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The Best 12 Volt Solar Battery Chargers for 2023

Written by Eddie B. Robinson / Checked by Justin Tucker

It’s worthwhile having the best 12 volt solar battery charger because it helps charge our automotive gadgets. It doesn’t only charge our devices but also offers portability for modern users like us. We can carry these chargers anywhere to charge our batteries or devices.

best 12 volt solar battery charger

However, you might find it challenging to choose one because there are many of them on the market. For this reason, you might be feeling confused and stressed right now, especially without an idea on which among those kits are for you. Let us help! The following are our top suggestions for a solar battery charger that you might want to consider.

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Preview ECO-WORTHY Charger

Sunway Solar Charger


Dimensions 9.13 x 1.34 x 8.02 inches 0.5 x 13.98 x 5 inches 16.73 x 10.43 x 2.51
Output Voltage 12V 12V 12V
Power 5W 1.5W 6W
Max Voltage 17.9V 18V 18V
Details Details Details


 Best 12V Solar Charger for Battery Reviews

1. ECO-WORTHY Battery Charger

  • Completely weatherproof
  • Does not have reverse charging
  • Durable design
  • Easy to use
  • It comes with an adapter, enabling you to charge both the battery from the direct post clips or power outlet.
  • Unclear installation

One of the significant considerations in living off-grid is how you will power your home trailer. The main concern here is to have a portable solar power panel with a durable battery charger backup that will supply power. With the item, you don’t get to worry about running out of power in your RV trailer.

The package comes with a trickle charger that aims to maintain and prolong battery life. It does not overcharge your battery, so you can make sure that your battery units are in good condition and safe to use.

The solar battery charger with overcharge protection does not use reverse or discharging options. It is engineered with a blocking diode built inside the unit to keep reversing the power from your battery. It means that it is very safe to leave the unit plugged in 24/7 on the Cig connector.

It is made from durable and long-lasting polycarbonate, making it weatherproof. You can use it outdoor in any weather condition.

The battery that used this charger can last up to weeks or even a month while on standby mode. But if you use it daily, it daily, it can provide enough charge to power your room for a week. It also works perfectly in a trickling truck battery. It can also be used as s USB solar charger.

However, the package does not include any directions on how to install or use the portable charger. But you don’t need any manual or instructions in establishing this because it is easy to and simple device to use. You just have to peel off the plastic layer covering the device, plug it in and you’re good to go.

It is also great in maintaining the power charged. Although it not advised to use this in charging a dead or empty battery, it is merely useful in keeping the battery in a good state.

2. Sunway Solar Battery Charger

  • Amorphous solar panel charges even under dull weather
  • Easy to use and install
  • Durable construction
  • Built-in blocking diode prevents reverse charging
  • Eco-friendly
  • The charger is not fully waterproof

One of the best options for a 12 volt solar panel battery charger that I can recommend is the Sunway Solar battery charger. Solar Sunway is one of the leading brands you can trust to deliver you with a high-quality product that is guaranteed to perform. If you are looking for a charger for the battery maintenance of your vehicle, this product is for you.

The Sunway Solar battery charger has an amorphous solar panel. I find this kind of panel helpful and convenient. The charger works even if the weather outside is dull, and the sunlight is scarce. It makes this charger ideal for use in all seasons.

I also like how easy it is to use and install the12 volt solar charger. The Sunway Solar battery charger can be mounted on the windshield or dash of your vehicle. I also like how they included a suction cup so you can quickly put your charger anywhere you like with direct sunlight.

You can never go wrong with the durability of the Sunway Solar battery charger. Sunway Solar uses only high-grade materials for their product. As with this charger, it is made with durable ABS plastic housing. The charger is also covered with ultra-clear PV glass that is more efficient. You can count on your charger to last you for long time use.

The Sunway Solar battery charger is designed with a built-in blocking diode that ultimately prevents reverse charging. It is ideal for the optimal maintenance of your battery. The lightweight and compact design of this product is also a plus.

As for its downside, however, the Sunway Solar battery charger is not waterproof. It can only withstand splashing, but it can be damaged if submerged to water. Overall, I like and would highly recommend this product. It comes with great features at a reasonable price. It is well made, reliable, and durable. This product is guaranteed to charge and maintain your battery all in the most eco-friendly way.

3. SUNER POWER Solar Car Battery Charger

  • Protected with tempered glasses for fast light transmittance and abs frame for durability
  • Low maintenance and easy to install
  • Portable and lightweight
  • Reverse protection, so it does not drain your battery
  • Comes with cigarette cables for more applications
  • Doesn’t have a USB port

The sun gives off a surmountable power that you can utilize in powering your home, trailer truck, RV, boat, even your truck. With the right device like SUNER POWER solar powered 12 volt battery charger, you can charge your battery anytime, anywhere – as long as there is sunlight. Built and designed by one of the most trusted solar power designers in the US, SUNER POWER, and this multi-functional charger will power up your homes.

Aside from the fact that it is designed by dependable solar technicians who aim to utilize sun power, this charger is packed with other features and benefits, especially from outdoor and off-grid living. So, whether you’re camping for the weekend or living tiny in a trailer truck, this charger is all you need to power up your place.

Batteries naturally lose power even without using it. If you let this happen frequently, you might never use the full power potential of your batter for life. This maintainer and charger device will help you prevent that from happening. It charges 12V batteries, helping you maintain them and keeping them from draining.

This charger transfers light energy to your deep cell batteries to power up your home. It is designed to withstand any weather, allowing it to last for a very long time. You can leave it outside or in your truck without wearing out.

It’s efficient and fuller solar panel absorbs a broader range of the sun, allowing you to get more solar energy for power conversion. The charger also can generate electrical current to trickle and charge the battery – even your truck battery.

The solar deep cycle battery charger has a blocking reverse diode that safeguards your battery from discharging or overcharging when plugged in for a long time. It is easy to install and comes with four suction cups for safe mounting and two interchangeable clamps.

However, it does not have a USB port for direct charging phones or other similar devices. It is still worth buying because you can always charge your phones and gadgets from the plugin port. With all its features and energy-saving benefits, you will truly maximize the solar power with this charger/maintainer device.

4. SOLPERK 10W Solar Panel Charger Kit

  • Easy to install and adjustable
  • Highly efficient controller
  • Charger and Maintenance Device
  • Fully-automatic charging and maintenance device
  • Weatherproof
  • 12 months warranty and lifetime technical assistance
  • An unstable bar that holds it to stand

Here comes the SOLPERK 12v solar charger kit from the company that brings you the solution to solar charging problems. Solar charging is one of the most efficient and pollution-free forms of energy. You can take full advantage of the solar power and use it at home with this solar panel charger kit.

Batteries are designed to discharge itself if stored and unused for a very long time. You can’t do anything about that except for a maintainer charger that helps your battery from being drained – giving it a longer life.

It uses polycrystalline solar cells, which is known to be more efficient than those of conventional models in the market are. It can also store higher power and use it efficiently. It is also designed with a controller, allowing you to take charge of how long you’d charge the battery and the amount of voltage to store. This will help you maintain and avoid any damage to your cells. You can leave it all day long under the sun. It charges as long as it can sense a ray of sun.

It is easy to install and connect. You don’t need to install extension cords as it comes with longer cables. It is also safe and cannot harm humans or animals that might come near the device.

The solar car battery charger with charge controller surface is made from durable fiberglass, making it easier to clean.

The solar panel is made from poly silicone that can produce up to 10 Watts, 556 mA, and OCV 21.3 V. It has 12V operating voltage. With the dimension of 13.4×9.8×0.7 inch and 2.4 lbs., this charger is lightweight and portable. The package comes with one solar panel, a Charge Controller, Battery cable, self-tapping screw, and two more expansion screws.

However, the bar that holding the panel to stand is not that stable, especially when the screw loosens up. Always check the screw of the bar that holds the panel to stand. It is a durable product, and the screw will hold the panel strongly unless it was shaken very hard for a long time.

5. POWOXI Solar Battery Charger

  • 20% conversion rate of solar panel
  • Durable construction
  • Easy to install and use
  • Lightweight and compact
  • 12-month warranty
  • Not suitable for places with extreme heats

For a 12v solar panel battery charger, you can choose the POWOXI solar battery charger. This battery charger comes with the necessary features for the maintenance of your battery.

The POWOXI solar battery charger ensures that your battery will not overcharge nor discharge. One of the reasons why I like this charger is because of its anti-reverse charging feature that is possible with its built-in blocking diode structure.

I also like that the POWOXI solar battery charger has Single Crystal Silicon Solar Panels. This panel is known for its high conversion rate. As for this particular model, its conversions rate is up to 20% for efficient charging.

The durable construction of the POWOXI solar battery charger is one you can trust. It is designed with ABS plastic housing. Its transparent and iron tempered glass only adds to its durability. It can withstand impacts and even wind and snow resistance for a long-lasting charger. It is also waterproof, which makes it ideal for outdoor use.

I also like the smooth operation and installment process of this POWOXI solar battery charger. It has a quick one-way connector that is simple to recognize and use. Included in the package are also the alligator clamps and cables. It is to connect the charger directly to the battery when the cigarette lighter, in some vehicles, cannot operate when the ignition is turned off.

The lightweight and compact design of the POWOXI solar battery charger is another allowing you to bring along this charger on any trips you plan to have. With this product’s 12-month warranty, you can be confident that you will get the best out of the money you spent.

For its downside, this product might be incompatible in place with extreme heat exposure. Despite that, I can confidently recommend this product. It is well-made with its durable construction, lightweight and reliable. It is a solar battery charger of exceptional quality that is definitely worth your money’s value.

6. ECO-WORTHY 12V Portable Charger

  • The battery charger is waterproof
  • Durable construction with high-grade aluminum frame
  • Lightweight and compact design for easy transport
  • Charger controller offers overcharge and discharge protection
  • Excellent and reliable customer service
  • Some users ended up using the warranty

Another excellent option for a 12-volt solar battery charger is the ECO-WORTHY 12V Portable Waterproof Charger. Your satisfaction is guaranteed with this top-rated 12v solar battery charger. It comes with great features that ensure that it can do its job for the maintenance of your battery without harming the environment.

One of the best things about the ECO-WORTHY 12-volt solar battery charger and one of the main reasons why I prefer this charger is because it is waterproof. You don’t have to worry about some splashing on it panels while charging.

The quality and durability of this product are also guaranteed. ECO-WORTHY is committed to releasing a product with their customer’s satisfaction in mind. True enough, the ECO-WORTHY 12 volt solar battery charger is made of a durable corrosion-resistant aluminum frame. With its durability, this product is sure to last for many years without you having to buy new ones frequently.

I also like the lightweight and compact design of the ECO-WORTHY 12-volt solar charger. It makes it easier to carry it on road or camping trips. Included in the package are alligator clips and 78-inch cables. You can also power up to two devices at a time. Its charger controller also offers an overcharge or discharge protection.

Excellent customer service makes our lives easier. If you have any issues or questions regarding your battery charger, you can always call their reliable customer service. They are ready to answer all your queries and help in resolving any issues with your product.

However, for its downside, some user does end up using the warranty for this product. But overall, I still think the ECO-WORTHY battery charger is an excellent choice for a 12-volt solar battery charger that you should try out. It is waterproof and durable. You can rely on it efficiently do its job. It is a well-made and quality product at such a reasonable price.

8. MOOLSUN 12V Solar Battery Charger

  • 5% solar panel conversion rate
  • Prevents reverse charging
  • Slim and lightweight
  • Durable
  • 18-month warranty
  • Not fully waterproof

For a 12-volt solar battery charger, you can never go wrong with the MOOLSUN 12V solar battery charger. This charger is made for all kinds of battery maintenance. You can use this to charge your motorbike, tractors, or snowmobiles.

The MOOLSUN 12V solar battery charger is one of the most trusted out of all the others in the market because of its high conversion rate. This battery charger uses only high-efficiency solar cells with a conversion rate of 23.5%. This charger works well even under gloomy weather conditions.

I also prefer the MOOLSUN solar 12 volt battery charger because of its anti-reverse charging feature. This charger has a built-in blocking diode to ensure that your battery will not discharge.

The slim and lightweight design of the MOOLSUN solar battery charger is another feature that I find helpful and convenient. It is light enough to make transport easy. You can bring this charger anytime you go on a trip to use anytime you need it.

The MOOLSUN solar battery charger is also easy to use and install. This device is also a plug-and-play type that does not need any complicated steps in setting up.

You can easily plug and then play this charger. It even includes suction cups for secure mount. It also allows you to use an SAE connector, cigarette lighter, or the alligator clip adapter. All these great accessories are included in the package.

The durability of the battery charger is one you can count on to last for a long time. It is scratchproof, shockproof, and dustproof. It has a waterproof function ideal for outdoor use.

Its warranty is another advantage. The battery charger comes with an 18-month warranty for the customer’s satisfaction.

However, the MOOLSUN solar battery charger also has a downside. As mentioned, it has a waterproof function, but this product is not waterproof. It cannot be submerged into the water, so you need to be cautious. Still, I would recommend and suggest that you avail of this product. It offers an eco-friendly way of maintaining your battery with its great features at an affordable price.

9. TP-Solar 12 Volt Solar Battery Charger

  • High-efficiency solar panel
  • Prevents overcharging and reverse charging
  • Easy to use and operate
  • Durable construction
  • Portable and compact
  • Weather affects charging efficiency

You may also want to consider the TP-solar solar panel 12v battery charger if you are scouting for a good solar battery charger. You will not regret availing of this product because of the beautiful features and the performance it offers.

One of the beautiful features the TP-solar battery charger has is its high-efficiency monocrystalline solar panel. It has a high conversion rate and efficiently converts sunlight to electric energy for the optimal charging of your battery.

The TP-solar battery charger is even made better with its built-in circuit board. This feature not only prevents your battery from overcharging but also protects it from discharging, especially at night, when the charger has a lower voltage.

You can use the TP-solar battery charger for charging not only your cars but other vehicles as well. Included in the package are clamps, cigarette lighter plug and O-ring terminal for broader applications. You can use this to charge motorcycles or motorboats.

I also like how easy it is to operate and install the TP-solar battery charger. It requires no professional knowledge. The connections and plugs are easy to figure out. I also like that they included suctions cups and carabiner clips to make mounting and installation easier.

You can count on the durability and quality of the TP-solar battery charger for long-term use. This battery charger is made of premium-grade materials that are waterproof and long lasting.

The portable and compact design of the TP-solar battery charger is another advantage to consider. I like how light it is that you can easily carry it along whenever you go on trips for when you need it.

However, for its downside, the weather condition can affect charging efficiency. Charging may be a little difficult for dull weather conditions. Overall, I would highly recommend this product. It does its job well as intended and has excellent durability for a long-lasting charger. It is a reliable product and definitely, worth the money you spent.

10. SUAOKI Solar Battery Charger

  • 5% conversion rate
  • Durable construction
  • Lightweight and compact
  • Prevents reverse charging
  • 18-month warranty
  • Some users ended up using the warranty

If you are looking for a 12-volt solar battery charger, one of the highly recommend is the SUAOKI solar battery charger. This charge is designed for the maintenance of your car battery and other smaller vehicles.

One of the reasons why I think this is an excellent option for a solar battery charger is because of its high conversion rate. This battery charger has a premium quality solar panel with high solar efficiency of up to 22.5%. It effectively converts sunlight into electric energy for the maintenance and charging of your battery.

I also like the broad application of the SUAOKI solar battery charger. You can use this battery charger, not only for your car but also for maintaining the batteries of your motorcycle or tractors.

Of course, for more efficient charging, the SUAOKI solar battery charger also has a built-in blocking diode. This feature prevents your battery from discharging. It is always nice to have that assurance that your battery will not go discharged, especially at night, when the charger’s voltage is lower.

I find the compact and lightweight design of the SUAOKI solar battery charger convenient. This charger is light enough to bring along to your ventures.

The durability of the SUAOKI solar battery charger is also guaranteed. This battery charger is made of water-resistant and heat-resistant material making it ideal for outdoor and, of course, long-term use. You can save some money from buying frequent replacements.

You might also want to consider the SUAOKI solar battery charger on its excellent warranty. I am more confident with this product because of the 18-month warranty it offers. Their reliable customer service is also always there to help with any issues with this product.

However, on the downside of the SUAOKI solar battery charger, some customers do end up using the warranty for their product. Still, I suggest that you avail of the SUAOKI solar battery charger if you are looking for a reliable charger for your vehicle. It is an excellent product with all its beautiful features, all at a reasonable price.

 Battery Tender Solar Battery Charger (Outdated)

  • Built with durable battery tender 3-step microcontroller for safe charging
  • Reverse charge protected
  • Waterproof, spark-proof, and weatherproof
  • With temperature compensation sensor
  • Built for outdoor use and trickle charging
  • Easy to install, lightweight, and slimmer in design
  • Shorter cord

What could be better solar power 12 volt battery charger than a 5-Watt Solar Panel that is built with battery tender and 3-step automatic microprocessor controller? This battery charger is designed to maintain and keep your solar batteries in good shape and better use over time. As long as the sun shines, you have your power at home, boat, RV, or trailer house.

It has a total capacity output of 12V nominal voltage, 270 m Amp DC, from its 5W battery. It’s slim and space saver design measures approximately 14″W X 16″L X 1″H in dimension and weighs only 3 pounds – making it perfect for small space home.

This is a great charger for charging outdoor devices you might have on your boat, trailer, or RV since this is completely spark-proof and weather resistant. It can resist extreme weather conditions – from 120 degrees Fahrenheit down to negative 20 Fahrenheit.

You don’t have to worry about water splashing over it when it rains or when you’re maneuvering your boat.

It is reverse polarity protected, so you don’t get to worry about overcharging and breaking your batteries after charging them for more than 24 hours. It maintains the battery’s good condition.

It does not only charge your batteries but also maintains it for good. The built-in microprocessor controls the voltage that flows to the cells. It helps avoid over-charging and keeps the batteries at an adequate voltage level, thus lengthening their shelf life.

However, it has a shorter cord. Still, the item is worthy of a device for its durability, power charging capacity, and power efficiency. Besides, you can always use or purchase a longer cord for the 12v solar battery charger if you need a longer one.

What Is A 12V Solar Battery Charger And Who This Is For At Least


With the advancement in technology also comes all great inventions that ultimately make our lives easier. One of these fantastic innovations is the solar battery chargers. It has gained momentum and popularity among consumers these past years because not only does it help reduce carbon footprint, but it is also more economical for the buyers.

A 12v solar battery charger is manufactured to charge and maintain your batteries. It works for various kinds of vehicles such as cars, tractors, and snowmobiles. Generally, this solves your worries of drained batteries, especially when you go on a trip.

Generally, a 12 volt solar battery charger kit works with just the energy from the sun so you can charge your batteries whenever needed. It is a handy device to have whenever you decide to go on the road or camping trips. Imagine having to deal with a dead battery while you are traveling on a trip. It ruins all the fun for you and your companions.

It does not only that a 12v solar battery charger can maintain your battery, but also extend the life of your vehicle’s battery. Battery life is shortened if you do not keep your batteries charged. It is important to stress; however, this type of charger works only to top-up a working battery that was drained not to power up a battery that has completely discharge.

The 12v solar battery charger is ideal for those who are looking for an environment-friendly way to charge their batteries. It is effective in reducing your carbon footprint even in your little ways. Also, if you want to have a reliable charger to have on the go without spending too much, this type of charger is your way to go. Overall, it is a good investment and at the same time, an eco-friendly way to maintain your batteries.

How Does It Work

A solar battery charger for RV is designed for the maintenance of the batteries in vehicles such as cars, RVs or motorcycles, and other smaller vehicles. Portable solar chargers are generally used for trickle charging, providing your batteries with low-level current continuously. But how exactly does a solar battery charger do this?

Solar battery chargers are suitable for the off-the-grid type of living as it uses energy from the sun to charge your batteries. You don’t need other energy sources, only the sunlight. Your solar battery chargers harness energy from the sun and convert it into DC electricity through a photovoltaic array. It is then stored in your battery and used to power it up.

Charging your battery with a 12v solar battery charger is made easy. You don’t have to possess the professional knowledge to figure out which goes where. You can easily plug in the charger to your vehicle’s cigarette lighter.

But there are other vehicles that their cigarette lighter won’t work if the ignition is turned off. Conveniently, in this case, solar battery chargers also come with alligator battery clamps and extension cables so you can connect to the battery directly.

Solar battery chargers are portable and compact. You can quickly bring them along whenever you decide to go on adventures or outdoor trips. They can be mounted easily on your windshield or dashboard, or whichever area has access to sunlight. Some solar battery charges come with suction cups or clippers for easier installation.

With all that said, it is essential to note that a solar battery charger performs best with optimal sunlight exposure. It is then vital to make sure that your solar battery charger is receiving a right amount of sunlight to charge your batteries. A shady area and dull weather conditions can affect the efficiency of your solar battery charger.

What Are The Different Types Of 12 Volt Solar Chargers For Battery


There is a long list of available options for a 12-volt solar battery charger in the market today. Every year, manufacturers manage to come out with new and improved models for their customers. To aid you in choosing one the most suited for you and to help you understand your equipment, it is essential to know the different types of solar battery chargers.

Generally, they are classified according to the solar panels they sport. The panels are the ones responsible for harnessing energy from the sun for charging your batteries. It is a more efficient panel, the better.

Concentrated PV Cell (CVP)

This type uses optical concentration to collect light. It is ideally intended for large collectors. It tends to run hot and would consistent solar tracking.

Those are the types of solar panels you can mostly see on a 12v solar battery charger. You can choose one that you think is more fitting to your intended use and need.

Polycrystalline Solar Panels (p-SI)

The second type is the polycrystalline solar panels. This type is the product of newer technology. Although regarded as inferior compared to its monocrystalline counterpart, with the recent advancements in technology, it manages to be almost on par with regards to its efficiency with the monocrystalline one.

They are a more economical option and are also more durable than monocrystalline panels. However, they tend to be more sensitive when exposed to high temperatures. They also have shorter life spans.

Thin-Film Amorphous Silicon Solar Panels (A-SI)

A relatively newer technology compared to the previous two. It is more affordable because of the low-cost manufacturing process. It is not as developed as the monocrystalline and polycrystalline ones, but it has potential, especially in the coming years.

Monocrystalline Solar Panels (Mono-SI)

This type of panel on solar devices, such as the solar battery charger for the boat, is the oldest one. But this does not mean that it is outdated and less relevant. On the contrary, monocrystalline solar panels are efficient among all the other solar panels. Because it is the oldest, it is also the most advanced technology. They are more common for commercial purposes. Relative to other models, they also have a high lifetime value.

But because it has higher efficiency, it tends to be costlier than the other types. However, it is guaranteed that a solar battery charger with this type of solar panel performs well and definitely worth your money’s value.

Advantages And Disadvantages Of Using A 12v Solar Charger

Now you may be considering owning a solar battery charger for a car for yourself. That would be the right choice. Now to help you make up your mind, here are some of the advantages that a 12-volt solar charger has to offer.


Let’s start with the fact that a 12v solar battery charger is the most suited way of maintaining your battery is an eco-friendly way. This portable device utilizes energy from the sun to top-up your batteries.

Now, not only is this good for the environment but ultimately advantageous for you, especially when you are on a trip or outdoors with no other electrical source. You can now do away with your worries of dealing with a dead battery on your trip.

Portable and compact for easy transport

As mentioned, you never have to worry about a dead battery on a trip. Solar chargers usually have a compact and lightweight design allowing you to easily carry and bring along this charger every time you go on trips or camps.

Easy to use and install

What makes the best 12 volt solar battery charger more appealing is its simplicity in operation and installation. Conveniently portable, this charger can be installed on your windshield or dashboard. Usually, they also come with suction cups for easy mounting.

The plug and play design of solar battery chargers also make life generally easier. Everything is simple and easy to figure out. You just connect the charger, and then with enough sunlight, your battery will now charge.

Reverse charging protection

Solar battery chargers have a built-in blocking diode. Your solar battery charger can provide your batteries with just the needed energy without overcharging, but with this feature, it also makes sure that your battery will not be drained by reverse charging, especially during the nights when there is no sunlight.

Extends battery life

If you keep having a dead battery and it is drained for an extended period, this can damage your cells and will shorten its life. A solar battery charger makes sure that your battery has the needed energy without overpowering it. It effectively maintains your battery for longer battery life.

Saves money in the long run

Since you don’t need to plug them in electric grids, having a solar battery charger helps you save from electricity bills. And with its availability in the market, you are sure to find a charger that fits your budget, one that has the same features and functions with the more expensive ones.

However, a 12v solar battery charger also has a disadvantage. We have mentioned that the primary power source of solar battery chargers is the sunlight. Naturally, if you are in a shady area with no access to direct sunlight, your charger may not work its best. Extreme weather conditions affect it the same way. Charging may not be as efficient as it is on a sunny day.

Overall, a 12v solar charger is a convenient and useful device to have. It maintains your battery in an eco-friendly way without denting your savings.

How We Picked And Tested


A 12V battery is a common choice among individuals trying to be eco-friendly. It is very easy to source and requires minimal maintenance, too. An essential component of any battery is the charger. One needs to have an efficient system to bring power to the battery. Choosing an excellent solar battery charger, such as a harbor freight solar battery charger, can be tricky, though. Here’s how you can pick the right one for your needs.

Consider What You are Going to Use it For

Always consider how you intend to use the solar battery charger. If your only aim is to provide a power source for your battery, you will have to choose a device that has the correct amperage and wattage relative to your existing battery’s power. This works for people who may have a difficult time starting or operating their electrical devices after a freezing night.

It would also be wise to pick a gadget with a higher wattage or amperage if you decide to use it for powering up other items. The modern technologies present in many devices are very sophisticated. Unfortunately, they are also power-hungry. You can have two identical battery chargers.

However, using one of these chargers on a power-hungry technology can translate to a faster battery drain. The faster the charger loses its charge, the more frequently you will have to recharge it.

Look at the Power Ratings of the Device

A 12V solar battery charger will often have power ratings in both amperes and watts. A 5-watt device should be great for powering your small handheld gadgets. Unfortunately, it may not have enough juice to supply the energy requirements of more significant and power-hungrier electronics.

Picking a 10-watt charger should be excellent for trickle-charging a few devices. However, if you also intend to power up the different 12-volt electrical items, then you will need a solar battery charger that has a higher wattage.

Check the Efficiency Rating of the Charger

These chargers depend on solar energy. Some products take almost the whole day of exposure in the sun for them to “recharge.” While they can still recharge even in an overcast sky, the rate of recharging can be prolonged. The recharging of the device can also cease altogether at night, or there is no more sun in the sky.

What you want is a gadget that can recharge very fast. You also want a system that can continue charging itself up even when there is no sun. As long as there are UV rays, regardless of how minute they are, then the device should be able to pick them up and harness their energy.

It is also worth mentioning that the unit should also be efficient during extreme weather conditions. You would want to be able to start your car in the middle of a winter storm. A capable 12V solar battery charger can deliver the power that your solar power battery needs to crank the engine or operate a device.

Always go for devices that are at least 20 percent efficient. The higher the rating, the better you will be in the most extreme of circumstances.

Check the Size of the Device

Manufacturers of solar 12V battery chargers make their gadgets smaller every year. What used to be an issue of space in the trunk is now academic. It is the same as the weight of the devices. It used to be big and hefty. Now, they are lightweight and very compact.

However, there are still those that are wide or tall or both. These units can again take up plenty of space in your trunk. That is why it would be best to check the dimensions of the product that you wish to buy. Also, consider the activities that you will be using it. If you intend to bring it in your outdoor activities, then it is best to pick one that you can slip in your pocket or stash in your backpack.

Look for an Energy-retaining Feature

Battery drain is a given. You can always pick a gadget that has a higher wattage or amperage rating to address this issue. However, it does not address the leaking of stored solar energy in the device. What you want is a system that has a feature called reverse charge-blocking diode or RCBD. This technology lets the charging system to retain the solar energy that it collects. It prevents the leakage of this energy when there is no sun to recharge the unit.

The good thing about such a feature is that you can find it in almost every other solar 12V battery charger in the market. However, it would still be wise to make sure that the unit you want to buy has this feature.

Keep these things in mind whenever shopping for the right 12V solar battery charger. It should always answer your specific needs.

Frequently Asked Questions


What are the materials that make a solar charger more durable?

Amorphous silicon makes a solar battery charger 12V unit more durable than products with crystalline silicon wafers. Hence, to gauge the durability of a solar powered 12V battery charger, you can take a look at the built-in solar panel to see what it’s made of.

Most solar panels feature silicon semiconductors, which are available in two options—amorphous and crystalline.

However, most photovoltaic cell manufacturers use crystalline silicon because it is cheaper to manufacture, allowing them to market and sell the products at a more affordable price.

In contrast, leading solar technology brands prefer amorphous silicon because it has a higher temperature tolerance and greater flexibility than crystalline photovoltaic cells.

Plus, amorphous silicon never suffers from low-light-related energy efficiency reductions, making it the ideal choice for solar power users in areas with limited sunlight exposure.

Hence, an amorphous silicon-embedded solar panel 12 volt battery charger is your most suited option if you require longevity, lightweight construction, flexibility, customization, indoor performance, and outstanding shade tolerance.

However, amorphous silicon technology might not be the top-tier choice if you are budget conscious.

Can you use all solar chargers for camping purposes?

No, not every solar charger is suitable for camping purposes. Considering that camping is a brief outdoor activity and only requires a handful of electrical appliances, it’s not necessary to prepare a particularly large solar charger to power these devices.

Hence, you only need a portable solar battery charger, not a power-generating device that is more suitable for RVing or boondocking. Seasoned campers recommend a solar battery charger with at least 15 watts power output but not exceeding 100 watts.

A solar battery charger with more than 100 watts is more suitable for RVs and camper life because it is bulkier than a 15- to 100-watt device. It would be challenging to carry such a gadget from the parking area to the campsite, especially when traversing hazardous terrain.

Solar battery chargers with a power output of fewer than 15 watts will prove useless at the campsite. You can recharge your GPS device and smartphone, but a 15-watt charger won’t provide sufficient energy to power other camping essentials.

Of course, you can always top up the solar battery charger, but nighttime will limit its use.

How to make sure if a solar charger is waterproof?

Checking if a waterproof 12V solar battery charger is indeed waterproof can be a hit or miss, especially if the product does not have reliable and valid documentation.

However, you can observe the following steps to ensure that a solar charger is waterproof.

  • Read the solar charger’s product specifications. Most solar battery chargers have an IP65 rating, although some might have a lower ingress protection (IP) value.
  • Check online documentation for the solar charger’s IP rating or waterproofing attributes if you cannot find the information from the user guide.

You can also post queries on internet community forums for help. For instance, r/preppers, r/CampingGear, and r/Survival are three communities that will be eager to help.

  • Learn what the IP ratings indicate once you know its rating. Focus on the IP value’s second digit, which shows its ingress protection against water. The first number, on the other hand, shows the device’s resistance against solid particles like dust.

For example, an IP65-rated solar charger can withstand low-pressure water jets, such as occasional rain showers. An IP67-rated solar battery charger can withstand water immersions between 5.9 inches and 39.4 inches deep.

The higher the IP rating’s second number, the more waterproof the solar charger is.

How can you charge a boat battery with a solar car battery charger?

Although you can charge a marine battery with a solar car charger, experts recommend such measures only in dire circumstances or emergencies. Note that charging your boat battery with a car charger might damage your battery.

A marine battery requires a slower recharging rate than a car starter battery, and the voltage output needs to be similar. For example, only a solar charger for 12V deep cycle battery will suffice for a 12V marine battery.

In addition, deep-cycle batteries have a larger capacity than traditional car batteries, averaging about 3,600 watts and 200 amps.

On the other hand, car batteries average about 1,200 watts and 100 amps. This, combined with the fact that the charger needs to be on the slowest charge rate, means it’ll take a longer time for your boat battery to be full.

It’s also important to avoid overcharging the boat battery because it can shorten its operational lifespan. Unfortunately, it can be challenging to estimate how long it’ll take, given the charging time variation between a boat and a car battery.

How long does a fully charged solar battery last?

A fully charged solar battery can power devices from as short as a day to as long as five or seven days. Everything depends on solar battery capacity, solar battery temperature, energy consumption, and the construction of the solar battery itself.

For example, you can expect a 200-amp solar battery to hold its charge longer than a 100-amp power cell, with similar energy consumption. On the other hand, using the 200-amp solar battery to operate four to six devices simultaneously will require more frequent charging than a 100-amp solar battery running a single energy-efficient gadget.

Like any battery, solar power cells require optimum operating temperatures for maximum performance. In other words, using the solar battery in extreme temperatures can affect its charge for the worse.

What are the most trusted 12 volt solar charger brands?

If you’re thinking about installing a solar charger and using it to charge your batteries, you might also want to check its brand to ensure you’re dealing with those that commit to the satisfaction of their customers. A few trusted ones are ECO-WORTHY, SUNER POWER, Battery Tender, and SOLPERK.

Will a 12 volt solar panel charge a 12 volt battery?

The 12V model can give an output that will be enough in charging a 12V battery under conditions like high temperature and low light level. But remember, a 12V battery will need at least 13.6V. It also means that the solar panel will have an output of 17V or above under perfect conditions.

So without even saying, it will cause damage to your battery if you would charge it with a solar panel that’s generating 17 volts. That is why a solar regular is used to accept the coming voltage using a solar panel. It will help in outputting a voltage that’s usable to charge the battery.

What size solar panel do I need to charge a 12v battery?

Some sources suggest finding a solar panel that’s with specifications of 30W and 12V. They are easy to find in RV stores, online marketplaces and auto parts stores. However, you also need a solar charge controller that should be rated for the same power with your solar panel. But if you want to add another solar panel, you might want to get one with double the size.

Nevertheless, it is common to use a 12V solar panel to charge a deep cycle battery. For additional tips, you can also calculate the panel’s powering load. With a 12V panel, 3AMPS is common, and then multiply it with the time amount that the panel will get most sun exposure that can be four or six hours on a sunny day. In this case, the panel can deliver up to 18 amps to the deep cycle battery. It will just mean using a 350AH battery for up to five hours with good solar energy supplied.

What is the warranty?

There is no one answer to this question. Manufacturers do not back their products with the same warranty amount. For example, some manufacturers give 12-month and the others 18-month warranty. There are different warranties, nonetheless. When shopping around, compare the warranty for added peace of mind.

How to install and use? 

You can refer to the instruction manual to install and for the proper use of the solar battery charger. But in most cases, you don’t have to follow any complicated steps in installing your solar charger.

How to care & clean?

You just wipe the panel dry with clean and non-abrasive cloth from time to time to keep the integrity of the solar panel.

Where to buy?

You can find these solar battery chargers in RV supplies stores, online stores, solar supplies shops, and other sources. Also, you can find these items on where to choose from a wide range of chargers by different brands and of different models. You can also find great deals from the manufacturer.


Referring to this buying guide, we’re hoping that you’ll be able to choose and buy the best 12 volt solar battery charger that you can rely on for a long time for its heavy-duty and reliable performance. Compare the items featured above and take a look at their unique qualities, pros, and cons to pick the right one for your needs. Also, think about specific considerations or features that you want your solar battery charger to have. Nevertheless, making an informed decision is just a step away with the ideas presented here. Buy a solar battery charger for your needs today!

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