Best Solar Battery Chargers Reviews for 2021(with trickle charger, boat, car and 12 volt)

See our picks for the best solar battery chargers on the market. Whether you are looking one for a car, RV, motorcycle, or boat battery, we have something for you. 

Keeping batteries fully charged is an effort we all make religiously. Sadly, when the rainy days knock, even a newly bought car, boat, RV, or motorcycle battery will drain out. Such moments can be challenging, especially if you have no backup solution. We understand the pains such moments can bring and that’s why we have brought to you the top 10 solar battery chargers to ensure your batteries don’t run out of juice.

Prepare for rainy days and avoid instances when you’ll be stuck in the middle of nowhere because your car or motorcycle battery can’t start the ignition. Check out our top ten solar battery chargers and select one that falls in line with your budget and performance specifications.

Product NamePanel Wattage Solar Panel typeCharging PortsDevice Compatibility Controller 
Eco-Worthy 12-Volt 10 Watt Solar Maintainer and Charger10WPolycrystalline Alligator clips/cigarette lighterCar/tractor/boat/snowmobile boatNo
Sunway 4W 12V Solar Car Battery Trickle Charger & Maintainer4Wpolycrystalline Crocodile clips/cigarette lighterMost 12-volt over 20Ah batteriesNo
SUNER POWER 6 Volt 12V Solar Car Battery Charger & Maintainer 6Wpolycrystalline battery clamps, cigarette lighter/one-way quick connectorMost types of 12-volt batteriesNo
Topsolar 10 Watt 12 Volt Solar Panel Battery Charger 10Wmonocrystalline alligator clips/cigarette lighter/DC plug connectorMost types of12V batteries for machines and equipment  Yes
SUNER POWER 30W 12V Solar Battery Charger & Maintainer 30WPolycrystalline SAE connectorSuitable for virtually all 12V batteriesYes
ALLPOWERS 18V 12V 10W Portable Solar Panel Trickle10WMonocrystallineAlligator clips/cigarette lighterPerfect for most types of 12V batteriesNo
SOLPERK 10W 12V Solar Panel Charger Kit 10Wpolycrystalline Alligator clipssuitable for most 12V batteriesYes
Topsolar Solar Panel Kit 30W 12V Monocrystalline Battery Charger 30WMonocrystallineBattery clipsPerfect for the majority of 12V batteries Yes
TogoPower 60W Portable Foldable Solar Panel Battery Charger with Dual USB Ports60Wmonocrystalline Battery clips/ cigarette lighterIdeal for most types of 12V batteriesYes 
POWISER 20W 12V Solar Panel Car Battery Charger Portable Waterproof Power Trickle Battery Charger20Wpolycrystallinealligator clips/cigarette lighter plugperfect for most types of 12V batteries Yes

1.   Eco-Worthy 12-Volt 10 Watt Solar Maintainer and Charger

Top up car, boat, motorcycle, and RV battery juice with the Eco-Worthy 10W solar battery charger. Outputting over 22 volts when absorbing maximum sunshine and approximately 17 volts on cloudy days, this charger is best suited for mid-sized cars and truck batteries. 

The 10W solar panel outputs a working current of 0.56A and a VOC of 22.41V. This solar charger comes with 4 PVC suckers, battery clips, a cigarette lighter adapter, and uniquely designed clips. The panel sits in a durable aluminum frame that’s IP65 waterproof rated. Telling when the battery is charging is made possible by the small LED indicators on the cigarette lighter.

If you intend to charge the battery of battery-powered equipment, boats, or automobiles you rarely use, install and leave it to do its work. You can mount the panel on the windshield or any other exterior part of your truck or car that receives optimal sunlight. If you live in an area with minimal sunshine, you would better connect it via the alligator clips as the output performance is better than when connected via the cigarette lighter adapter.

If you feel that your battery is too small to accommodate the power generated by the solar panel, you can use a solar controller to avoid overcharging. The unit doesn’t come with one, so you’ve to buy it separately. This solar battery charger kit is suitable for virtually all types of 12V batteries, especially deep-cycle batteries.

The charger has a built-in blocking diode that prevents your battery from draining off when not charging.

Pros 

  • The panel is efficient enough to charge during overcast days 
  • Its long cable makes for easy panel positioning 
  • This solar battery charger comes with a lighter adapter 

Cons 

  • Only suited for topping up batteries

2.   Sunway 4W 12V Solar Car Battery Trickle Charger

Maintain an undisturbed recharge of your car, boat, truck, or bike battery to ensure it doesn’t drain out with this 12W 4W solar battery charger. Outputting approximately 15 volts and 0.286Ah current, the 4W high-efficiency polycrystalline solar panel is perfect for compensating for minor battery drains from alarm systems and vehicle clocks.

Mount the panel on your car’s windshield for optimal output or the dashboard for optimal security. You can quickly plug it into your car’s 12V cigarette lighter. However, for optimal charging efficiency, you would rather connect it via the alligator clips. Use the charger to trickle charge your deep cycle, wet, AGM, and Gel batteries, ensuring they don’t run out of juice.

This solar battery charger kit has built-in diodes that prevent discharge at night or during cloudy days. You can use the charger outdoors as it’s waterproof, but you shouldn’t submerge it in water as that could damage it. However, it should only be used while the vehicle or equipment battery is not in use; otherwise, it would obstruct the function of your vehicle.

You can use this solar battery charger for virtually any 12V volt but works fine with batteries rated over 20AH capacity, especially those found in watercraft, motorcycles, snowmobiles, tractors, and more. You can tell whether the charger is working by checking the LED charge indicator, which lights blue when the current is flowing. The panel’s high-efficiency level ensures it can trickle charge your battery even during dull and overcast weather. Your purchase is covered with a one-year warranty and guaranteed after-sales service.

Pros 

  • Waterproof and durable 
  • Highly efficient crystalline solar panel 
  • Maintenance-free and easy to install 
  • Comes with a cigarette lighter plug and battery clamps 
  • Has a blue charging indicator 

Cons 

  • Not quite reliable during cloudy days 

3.   SUNER POWER 6 Volt 12V Solar Car Battery Charger & Maintainer

Looking for an affordable yet reliable solar battery charger, consider the Suner Power 6W solar charger. This charger outputs 18V and a maximum current of 330mA. The 6W polycrystalline solar panel has a high-efficiency rating to maintain your battery juice within the standard voltage level. It comes with three connection options, bare wire, battery clamps and cigarette lighter, so you can choose the most convenient option for you.

The charger works fine with most wet, deep-cycle, and Gel batteries used in RV, motorcycles, snowmobiles, tractors, and boats. Your battery won’t discharge even if you leave it connected overnight since the built-in blocking diode prevents discharge. You can easily mount this solar battery charger to your dashboard or windshield.

The panel is cased in a durable upgraded ABS frame and high-grade solar glass, built to last for years. It’s low output means it’s only suitable for maintaining battery charge. You can’t rely on it to charge a dead battery. The charger comes with cables, crocodile clips, and a cigarette lighter adapter. Sadly, it doesn’t come with a controller. You may have to get one separately. However, considering the one-year warranty and lifetime technical support, your purchase is secured.

Pros 

  • Highly efficient solar panel
  • Quite affordable for the value delivered 
  • Durable and waterproof
  • Perfect for use with different types of batteries 

Cons

  • It doesn’t include a solar controller 
  • It does not have an indicator 

4.   Topsolar 10 Watt 12 Volt Solar Panel Battery Charger

Arm yourself ready for the unexpected with this top-rated solar battery trickle charger and avoid instances when you’ll be stuck between a rock and hard surface because your car, boat, snowmobile, or truck battery has discharged.  Designed to work with virtually all 12V batteries, this battery charger is easy to use. The charger includes a highly efficient 10A charge controller designed to offer optimal reverse polarity protection to connected batteries.

Engineered for durability, the solar panel sits in a hard-to-break aluminum and tempered glass frame, which is not only weather-resistant but also long-lasting. You can use this solar charger to trickle charge the batteries installed on your RV, trailer, ATVs, boat, car, motorcycle, and more.  You can install the solar panel on the top of your car, tractor, truck or boat top for optimal sunshine absorption.

The 10W monocrystalline solar panel outputs a charging voltage of 14.5V and 0.8333 amps current. It includes a built-in circuity to protect your battery from overcharging. Its indicate light gives details of the charging status, ensuring you can tell when to adjust the solar positioning. The charger works when you connect the clamps to the battery or when you connect it via the cigarette lighter adapter. You can as well connect the solar panel to your battery via the alligator clips.

Its 10w crystalline battery is efficient enough to maintain the charge of your wet, deep cycle, and gel battery even during cloudy days. The charger contains four suction cups to ease mounting on any surface. The manufacturer offers a one-year warranty along with lifelong technical support.

Pros 

  • Waterproof and durable construction 
  • Highly efficient solar panel 
  • Easy to install and use 
  • Lightweight and easy to carry around 

Cons 

  • Short controller wire
  • It can get extremely hot 

5.   SUNER POWER 30W 12V Solar Battery Charger & Maintainer

Intelligently keep your battery charger under control, ensuring it never drains out with this Suner Power 30w 12v battery charger. This solar charger runs on the super-intelligent MPPT technology, known for its high power conversion efficiency of more than 30%. Running on a super-efficient 30W polycrystalline solar panel, the charger outputs 1.67A peak charging current and over 13V charging voltage. The unit employs the smart three-stage charging algorithm to deliver a better level of charge and battery maintenance.

The Led work status indicator updates you on connection errors, current battery voltage and charge status.  The 30W solar is housed in an IP65 waterproof tempered solar glass and reinforced ABS framing, so the charger is perfect for outdoor use. The charger has an internal charger controller that protects against over-discharge, short circuiting, reverse polarity, and discharge.

You can easily mount the solar bracket on a vertical wall or the ground on virtually any surface with quality sunshine. The adjustable mount brackets make that possible along with ensuring for easy angling of the solar panel position. You can clamp this solar battery charger to your battery terminals through the alligator clips or battery clamps. You can as well connect it to the battery via your car’s cigarette lighter. The Suner power 30w 12v solar charger is offered with a one year warranty and lifelong technical support.

Pros 

  • Highly efficient 30W poly solar panel 
  • Strong and solid construction 
  • Ease of maintenance and installation 
  • Quite affordable for the value delivered 

Cons 

  • The framing is not made of aluminum 
  • Not suitable for low-capacity batteries 

6.   ALLPOWERS 18V 12V 10W Portable Solar Panel Trickle

Solve the puzzle of drained batteries before the actual occurrence by investing in the ALLPOWERS 10W panel charger perfect for 12V and 18V rated batteries. It’s a highly efficient solar charger with an incredible output of approximately higher than 18 volts. When connected to direct sunlight, the panel generates slightly higher than 0.5 AMP, which is enough to trickle charger and keep batteries in shape.

The charger is made of mon-crystalline silicon solar cells, designed to be efficient enough to keep virtually any type of battery in shape. You don’t have to unplug the solar charger at night as the built blocking dioxide prevents reverse polarity and discharge. Quickly plug the charger into your car’s 12-volt lighter socket to sustain it with more juices or connect the solar panel directly to the battery terms with alligator clips. Car owners can easily mount the solar panel on their windshield via the two suction cups or mount it on the sun visor using the back strips.

The solar panel is weatherproof and can stand up to the harshest of weather conditions, so you can install it outdoors.  You can buy this solar battery charger to maintain the battery in a truck, car, equipment, boat or ATV you rarely use. You just need to mount the panel where it taps enough sunshine and leave it to supply your battery with adequate juices every day the sun shines.  As with its warranty, you’re getting 18 months and excellent customer service

Pros 

  • Runs on an efficient solar panel
  • High power output 
  • Easy to maintain and fun to use 
  • Portable and versatile design 

Cons 

  • Not quite durable 

7.   SOLPERK 10W 12V Solar Panel Charger Kit

Keep your car, snowmobile, boat, or marine battery charged and extend its life with the Solperk 10W solar panel charger. The charger keeps your battery charged while preventing reverse discharge to optimize its useful life. The 10W high-efficiency polycrystalline solar panel generates a charging current of 555MA and roughly over 13.7 volts, which is enough to trickle charge any size of 12V battery. 

Its covering is created of durable and easy to clean glass. You can use this charger to maintain a wide range of battery types including AGM, wet, EFB, and MF batteries. You would find it a great solution for use on charging and maintaining batteries used in trucks, gate openers, tractors, Powersports, snowmobiles, cabins, and RV.

This charger has full-automatic intelligent maintenance and charging controller and intelligent 3-level charging mode.  The highly intelligent and energy-efficient solar controller protects your battery against overload, overcharge, and short-circuiting. 

With the convenient and easy to adjust mounting angle, you can angle position the solar panel to absorb more sunlight. You can hook up the charger to your battery via the alligator clips, cigarette lighter adaptor, or the SAE wires. It comes with enough mounting accessories to allow for easy installation on the wall, vehicle rooftop or tractor rooftop.  This solar charger kit is waterproof and durable and can be installed outdoors. The charger manufacturer offers one year warranty and lifelong technical support.

Pros 

  • Excellent power capacity 
  • Easy-to-understand user manual 
  • Durable and affordable solar charger 
  • Portable and highly versatile design 
  • Long-standing performance 

Cons 

  • Not suitable for use with high capacity batteries  
  • The controller doesn’t work for lithium batteries

8.   Topsolar Solar Panel Kit 30W 12V Monocrystalline Battery Charger

Trickle charge 12V batteries made for cars, battery-operated gates, dry camping, boats, cars, cabin and gate openers with ease when you purchase the TopSolar solar battery charger kit. The solar kit comprises a highly efficient 30W monocrystalline solar panel housed in a heavy-duty anodized aluminum frame. Added with a solid tempered glass coating, the aluminum frame effectively protects the solar panel against wear and weathering.

This solar battery charger kit from TopSolar has a 10A solar controller ideal for preventing battery overcharge, discharge and overvoltage. Its 30W solar panel generates peak charging voltage of 18V and peak current of 1.4A. It boasts an incredible cell efficiency rating of 19.5%.

You can connect the charger to your battery using the alligator clips or the O-ring terminal cables.  It doesn’t come with the cigarette lighter adapter, so you’ve to get one separately.

You can install the charger anywhere in your greenhouse, garden, camping tent, vehicle, boat, or RVs to keep the batteries charged. You can also use the charger to power LED lights, garden lights, street lights, linear actuators, and fans.

You can mount the panel in any horizontal or vertical angle, thanks to the adjustable mounting brackets and pre-drilled holes. You’re at liberty to twist the solar panel to any angle of liking to optimize energy absorption.

Pros 

  • Easy to use and install 
  • Quite affordable and efficient 
  • It has reverse charge protection 
  • It’s highly durable
  • The charger is quite easy to carry around 

Cons 

  • Doesn’t have a warranty period 

9.   TogoPower 60W Portable Foldable Solar Panel Battery Charger with Dual USB Ports

Keep your off-grid batteries fully charged with this TogoPower 60W portable foldable solar panel battery charger. The highly efficient 60W polycrystalline solar panels are foldable and portable. This off-grid solar power station generates an optimal charging voltage of 18V and a current of 3.3A. It boasts a high conversion efficiency of 23%, so your battery will be charged even during cloudy days.

It’s a foldable solar charger offered with a kickstand that is splash-proof, stylish, and portable. You can use the charger to charge your phone or laptop when it runs out of juice thanks to the two USB ports.  The charger is perfect for use outdoors and during unexpected power outages.

The smart USB charging technology characterized by a QC3.0 and USB-C USB ports makes for efficient charging of devices.  Its UBS built-in smart IC chip is intelligent enough to recognize any device so that it can charge it more efficiently and without causing overloading or overcharging issues. Its four foldable legs at the back allow you to easily set up the panels to any angle of choice for optimal sunshine absorption. You can mount the four solar panels to any sport of choice on your car, greenhouse, tractor, truck, boat, or RVs.

You can connect the solar panels to your battery via the Anderson 30A cable or the various power cables.  As for charging devices, you can connect them to dual USB ports.  ToGoPower gives you 12 months of warranty and lifelong technical support as an assurance of value for money.

Pros 

  • Highly functional and efficient design 
  • Convenient carry handle and built-in mounting holes 
  • Weather-resistant and durable construction 
  • Smart USB charging technology 
  • Highly efficient polycrystalline solar panel 

Cons 

  • You may have to buy the cables for connecting devices separately 

10.                 POWISER 20W 12V Solar Panel Car Battery Charger Portable Waterproof Power Trickle Battery Charger

The last solar battery charger in our today’s post is PROWISE 20W 12V. It’s designed to be user-friendly and efficient. This solar battery charger includes indicator lights intended to keep you updated on the battery charging status. The green light indicates full charge, blue indicates a connection to the sun while red indicates charging. 

The charger has an intelligent built-in charging microprocessor and advanced charging algorithm, two systems responsible for ensuring optimal protection against short circuit, overvoltage, and overcharge. The charger is suited for charging and maintaining batteries found in snowmobiles, automobiles, ships, motorcycles, and RV.

With this solar charger, you’re getting a high level of solar power conversion efficiency. Provided the solar panel is positioned in open spaces to absorb enough sunshine, it discharges as much as 13 volts and 1.11A current. Its 3-piece SAE cable kit is user-friendly and easy to connect for instant use. It can be plugged into car cigarette lighters and 12V batteries in different machines and systems.

The panel in this solar charger is housed in a dustproof and waterproof ETFT casing that’s sturdy and long-lasting. The additional epoxy board layering on top of the ETFT adds to the charger’s durability. The charger can be connected to a battery via the SAE cable, cigarette lighter adapter, O-ring terminal, and alligator clips. You can as well connect it via the carabiner clips. The charger does not have USB ports, so you can’t use it to charge cell phones.

Pros 

  • Intelligent technology and efficient performance 
  • Easy and simple to use design
  • Durable and long-lasting 
  • Quite affordable and reliable 

Cons 

  • Comes with no warranty 
  • Limited charging power

Buying Guide for the Best Solar Battery Charger: 

Our top ten best solar charger reviews have shed some light on the features and qualities of the best chargers for outdoor and household use. These solar chargers are engineered for optimal performance, efficiency, and reliability. However, they are all different. Created by different manufacturers, carrying different features, and with different outputs. Before you finally bow your head for any of these chargers, here are some things to consider.

Consider the Load Power 

The load power of a solar battery charger tells the optimal power output of the charger. Solar chargers with more powerful solar panels deliver faster charge with fewer control issues. Different 12V batteries would require different levels of load power. Batteries with higher AH capacities require more solar power capacity to charge. 

Whether you’re buying the solar charger to trickle charge your boat, car, truck, snowmobile, or any other battery type, you’ve to check the battery capacity in question. You don’t want to buy a solar charging system that would add no value to your life. If you want to charge batteries with a capacity of 50AH and above, you would rather go for TogoPower 60W portable foldable solar charger as it outputs enough power to conveniently and quickly charge such battery sizes. It would as well be the best solar battery charger for small capacity batteries because it has a solar controller which reduces issues with overcharging or overloading.

Check The Construction and Durability 

You don’t want a situation when you’ll buy the best solar charger only for it to give up a few months of use. Different solar charger systems are created differently and can stand up to different environmental conditions. The construction and durability rating of any solar charger would ultimately determine how long it will serve you. Consider solar charger systems made of high-grade aluminum materials coupled with hardened glass for outstanding durability.

Look for chargers with waterproof and weatherproof coating as that would tell you how well the charger will stand up to extreme conditions. Check out customer reviews of each of the solar charger systems to know how customers feel about the charger’s ability to resist extreme water, wind, and UV conditions.

Solar Charger Versatility And Reliability 

Not many solar chargers can do more than just charging batteries. Some solar chargers are created specially to be used for charging batteries. They can’t be used to power devices and keep trickle charge common household electronics. Fortunately, at least five of the chargers we reviewed above can do more than just trickle charging batteries.

They can be used to charge laptops and smartphones as well. They are designed versatile enough to trickle charge a variety of different types of batteries. They can be used to trickle car batteries, ship and boat engines, snowmobile engines, and lots more. They’re simply fitted for use in a variety of everyday applications, including gardening and lighting.

Solar Panel Capacity and Efficiency 

Several factors affect the capacity and efficiency of any solar panel charger. They include but are not limited to the total solar panel wattage, solar panel type, and solar panel size. According to experts, polycrystalline solar panels are more efficient and reliable compared to monocrystalline panels. The best polycrystalline solar charger panels can convert approximately 14% of solar energy absorbed by the cells. There are more advanced solar panels packed with intelligent features that enable them to convert up to 24% of sunlight.

Larger solar panels with high wattage levels will always output more charge compared to low wattage panels. You don’t expect a solar panel rated at 60W to produce the same power amount as a panel rated at 20W. Therefore, when you’re shopping, look for solar chargers that run on higher wattage solar panels. That way, you will be able to keep your batteries full of juice even the sunlight is not bright.

Weight and Portability 

You shouldn’t forget to check the weight and portability of the solar charger you want to buy. Check out the details of each of the products we reviewed above comparing the total weight with the power out to know which ones to consider. You want to settle for a solar panel charger that’s not easy to handle and carry around but also powerful enough to keep your battery filled with juice. Don’t overemphasize weight and portability to neglect the value you’re getting.

●             Frequently Asked Questions About the Best Solar Battery Charger {FAQs}

Despite the many sources of information in the modern era, clients want to hear from you regarding the best solar battery chargers. To answer your questions, here we outline a section of questions and answers to help you better understand solar battery chargers before buying.

1.     What are solar battery chargers?

Solar battery chargers are simply solar panel-infused power stations that trickle charge batteries, enabling them to stay at top performance. These chargers are uniquely designed to control the juice entering and leaving your battery, preventing issues with discharge or overcharge. Solar battery chargers can be used for stored and active batteries alike.

2.     How do solar battery chargers work?

Solar battery chargers rely on the principle of converting sunlight into electricity, which is stored in a battery pack. They comprise a panel and controllers, which work closely to trickle charger different types and sizes of 12V batteries, optimizing battery performance and efficiency. Solar chargers may not give your flat batteries enough juice to make them useful, but they keep them active.

3.     Should I Place the Solar Charger Panel Directly Sunlight?

The answer to this question is a big Yes. If the charger has to keep your battery working and reduce instances when it will run flat, the solar panel should be able to supply enough charge. And for the solar panel to convert more juice, it has to absorb enough sunlight. Therefore, you must keep the solar battery charger panel in direct sunlight for convenient charging.

4.     How Can I select the best solar battery charger?

There are hundreds of known brands and models of solar battery chargers available for sale today. They vary in wattage, efficiency, and performance. It’s up to you to decide which of the solar chargers to choose, depending on the size of your battery and how often the battery is used. Evaluate each of the solar battery chargers we reviewed above and settle for ones that meet your quality and performance expectations.

5.     Is more wattage better in the best solar battery chargers?

More solar panel wattage translates to more power out. Simply said, solar chargers with better-rated panels will always convert more sunlight into electricity. They are more efficient and reliable, as well. You can count on them even during dull days with little to no sunlight.

6.     How do you know that it’s charging to battery because it’s doesn’t have an indicator led lights to show it’s working?

Simple. Once the conversion of solar energy into electricity begins, the cigarette lighter indicator will light up. When the light is on, it shows that the panel is converting sunlight into power, and the battery is being charged. If you’ve no cigarette lighter, you can use a voltmeter.

7.     Is the solar panel weatherproof?

Solar panels have a waterproof coating. Rains can’t damage solar panels. Rains wash off any dirt attached to the panels, ensuring more sunlight is absorbed by the solar panels.

8.     Can I keep it connected for over a month to maintain my battery? Can overcharge the battery

No.  When a battery charger stays connected to a car for months, it will overcharge. Yes, battery chargers high voltage that can charge rather than trickle the battery. However, if the battery charger has a controller, it won’t overcharge as it will stop charging once the battery is full.

9.     Can I link four 10W solar panels to create a 48-volt charger?

Connecting four 10W solar panels won’t create a 48-volt charger. Four 10W panels will output 40 watts, but that doesn’t mean you’ll have a 40-volt charger. You have to connect four 12 volt batteries to get a 48volt charger.

●    Conclusion

Don’t let the battery in your car or battery-powered system to drain out or get damaged while you can trickle charge and extend its life with a highly efficient solar battery charger. There are many solar battery chargers for sale, but choosing the best one shouldn’t be a problem as we just outlined some of the top-rated and frequently bought battery chargers with solar panels rated as low as 4 watts to as high as 60 watts. Regardless of your preferences, you can quickly settle for the one that suits your battery capacity and budget.

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