10 Best Solar Battery Maintainer in 2020 – Reviews and Buyer’s Guide

Best Choice

Sunway Solar Battery Charger and Maintainer

  • Trickle charging
  • Easy to install and use
  • Durable ABS plastic build
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Best Value

Nature Power Solar Battery Maintainer

  • Built-in barrier diode
  • Weather-resistant
  • Car adapter included in the set
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Premium

Schumacher SP-1500 Solar Battery Charger and Maintainer

  • Amorphous Solar Technology
  • Lead-acid battery
  • Water-resistant
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If you have a solar battery maintainer or charger already, then it may have helped keep your batteries topped up. The solar battery maintainers in this review represent a unique range of brands and features. However, based on reviews, we recommend the Sunway Solar Battery Charger and Maintainer. This device delivers just the right power for maintaining a full charge on your battery. Moreover, the splash-proof design, combined with the ABS plastic, makes this device durable, reliable, and weatherproof.

Well, that is its job!

They can be a valuable investment, but given the many misleading and often exaggerated advertisements in the market, people generally overlook its value and find it tasking to find the perfect choice.

You get different features with different battery maintainers, and to make your life easier, we have rounded up the 10 best solar maintainers in 2020 on the market.

Don’t worry, we’ve gone out and included a detailed buyer’s guide, so let’s begin with the review.

Our Top Pick

Sunway Solar Battery Charger and Maintainer

The solar battery maintainers in this review represent a unique range of brands and features. However, based on reviews, we recommend the Sunway Solar Battery Charger and Maintainer. This device delivers just the right power for maintaining a full charge on your battery. Moreover, the splash-proof design, combined with the ABS plastic, makes this device durable, reliable, and weatherproof.

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Quick Summary of 10 Best Solar Battery Maintainers in 2020

Product Image Product Name
Trickle Charger for Flat Battery Problem
Sunway Solar Car Battery Trickle Charger & Maintainer

Top-up your battery charge with the splash-proof solar battery maintainer. This battery has a built-in diode and an LED charge indicator.

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Carefree Maintainer for Both Indoor And Outdoor Use
POWOXI Solar Battery Charger and Maintainer

It is a CE and ROHS product that is easy to install and operate. The built-in barrier diode, color stabilization, and UV inhibitors make this product long-lasting and one of the best maintainers on the market.

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Super-Smart Charging For Long Lasting Battery
Battery Tender Solar Maintainer with Smart Charging Controller

It features reverse polarity protection, spark-proof built, and temperature compensation sensor for efficient charging of your battery, giving you a super-smart charging experience.

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Ultra-Light Weather Resistant Maintainer
ALLPOWERS Solar Trickle Battery Maintainer

Charge your battery wherever and whenever with the ultra-light, water-resistant, and heat dissipated AllPowers Solar Maintainer.

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Environment-Friendly Solar Panel for Longer Battery Life
Schumacher SP-200 Solar Battery Maintainer

The eco-friendly amorphous solar technology makes sure to store enough energy in your battery. It is water-resistant and features a lead-acid battery to trickle charge your device. This feature lengthens battery life by minimizing the drainage.

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All-Weather Battery Maintainer for Long Battery life
Schumacher SP-400 Solar Battery Charger and Maintainer

Amorphous solar technology, 12V lead-acid battery, water resistance, and durability make this device a decent solar maintainer on the market.

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Cost-Effective Solar Maintainer for Your Batteries
Nature Power Solar Battery Maintainer

Nature Power is an affordable and cost-effective device that is capable of maintaining the full charge in your battery. It has a built-in diode that prevents back discharge from your battery.

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Efficient Maintainer for Healthier Battery
Sunforce 52013 Solar Battery Maintainer

The Sunforce 52013 is a durable solar battery maintainer that has an ABS plastic shell with an amorphous solar that helps it overcome cloudy weather conditions as well as a blocking diode that prevents reverse charging.

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Convenient Power Supply for Your Batteries
Sunforce 50012 Solar Battery Maintainer

The Sunforce 50012 Solar is a practical and durable maintaining unit with a flexible working temperature range that works well in cloudy weather and prevents reverse charging, extending the battery life.

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Innovative Power Supply Long Performing Battery
Schumacher SP-1500 Solar Battery Charger and Maintainer

Environment-friendly and water-resistant, this is a useful device that gives you optimal performance with its amorphous solar technology.

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Best Solar Battery Maintainer in 2020 - Reviewed

Sunway Solar Car Battery Trickle Charger & Maintainer

Trickle Charger for Flat Battery Problem

Features Highlights

  • Trickle charging
  • Easy to install and use
  • Durable ABS plastic build
  • A built-in diode to prevent reverse charging
  • LED charge indicator
The Sunway Solar Charger and Maintainer uses solar power to top up your battery charge. The splash-proof design with a durable ABS plastic build makes the Sunway a suitable device for maintaining any solar equipment. Check Price on Amazon

Product Specification

  • Dimensions:

    13.9 x 0.5 x 5 inches

  • Weight:

    1.46 pounds

  • Power:

    4 watts

  • Battery Voltage:

    12 Volts

Pros

  • Quick and easy installation
  • Splashing proof design
  • Compact, lightweight, and durable design
  • Crystalline solar panel for higher efficiency
  • Maintenance-free
  • Blue LED light indicator
  • 12-month warranty

Cons

  • Not suitable during rainy weather conditions
  • The cigarette lighter may not operate when the ignition is turned off in some vehicles.

Our Verdict

The Sunway solar battery maintainer is one of the best devices to maintain and charge your battery. Its portable, compact, and durable design will serve efficiently, making this solar maintainer a great value-for-money product that you should get your hands on.

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POWOXI Solar Battery Charger and Maintainer

Carefree Maintainer for Both Indoor And Outdoor Use

Features Highlights

  • Built-in Barrier Diode
  • CE and ROHS Certified
  • UV Protection
  • Easy Installation
Enjoy powerful battery charging even in cloudy weather conditions with this ultra-convenient POWOXI solar battery charger and maintainer. Check Price on Amazon

Product Specification

  • Dimensions:

    14 x 8.5 x 0.8 inches

  • Weight:

    2.2 pounds

  • Power:

    3.3 Watt

  • Battery Voltage:

    12 Volt

Pros

  • Color stabilization and UV inhibitors
  • CE and ROHS certified product
  • Back discharge prevention
  • Durable and Waterproof

Cons

  • No charge profile controller

Our Verdict

Given that it overcomes the weather barriers of many solar devices, this portable, lightweight device might even exceed expectations. Besides needing to buy a charging controller separately, the durability and performance of this solar battery maintainer should bring this to your purchase list.

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Battery Tender 021-1163 Solar Maintainer with Smart Charging Controller

Super-Smart Charging For Long Lasting Battery

Features Highlights

  • Three-step microcontroller for smart charging
  • Weatherproof
  • CE certified
  • Easy installation
Reverse polarity protection, waterproof, spark-proof, built-in temperature compensation sensor, and CE certification make the Battery Tender Solar Maintainer a decent option for super-smart charging. Check Price on Amazon

Product Specification

  • Dimensions:

    17.8 x 17.8 x 3 inches

  • Weight:

    2.5 pounds

  • Power:

    5 Watt

  • Battery Voltage:

    12 Volt

Pros

  • CE approved and certified
  • Epoxy filled controller for protection against all weather conditions
  • Waterproof and spark-proof
  • Reverse Polarity Protection
  • Built-in temperature compensation sensor

Cons

  • An issue with amber LED indicator

Our Verdict

With a weather guard that helps it function in low sunlight hours and weathers, the Battery Tender 021-1163 Solar Maintainer should make its place in your list. However, you may find an issue with the amber charging LED indicator, in which case be sure to seek technical support.

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ALLPOWERS Solar Trickle Battery Maintainer

Ultra-Light Weather Resistant Maintainer

Features Highlights

  • ABS plastic casing
  • Built-in blocking diode
  • 23.5% more efficient than most monocrystalline panels
  • Durable
  • Easy to install
  • Weather Resistant
With the ultra-light, water-resistant, and heat dissipated AllPowers Solar Battery Maintainer, charge your battery wherever and whenever. Check Price on Amazon

Product Specification

  • Dimensions:

    16.7 x 11.2 x 1.2 inches

  • Weight:

    1.75 pounds

  • Power:

    18 Watt

  • Battery Voltage:

    12 Volt

Pros

  • Backed by 18 months of warranty
  • Easy to install
  • Durable ABS Plastic build
  • Maintenance-free

Cons

  • Short cable

Our Verdict

All Power Solar Battery Charger and Maintainer is an efficient next-generation device for any 12-volt batteries. It saves energy, reduces your bills, and increases battery life. You couldn’t look for reasons not to choose this device.

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Schumacher SP-200 Solar Battery Maintainer

Environment-Friendly Solar Panel for Longer Battery Life

Features Highlights

  • Amorphous Solar Technology
  • Lead-acid battery
  • Water-resistant
Extend the battery life with the Schumacher SP-200. Its eco-friendly amorphous solar technology harnesses the power of the sun and stores the energy in your battery. Check Price on Amazon

Product Specification

  • Dimensions:

    11 x 2 x 20 inches

  • Weight:

    2.4 pounds

  • Power:

    2.4 Watt

  • Battery Voltage:

    12 Volt

Pros

  • Fully Water Resistant
  • Lead Acid Battery
  • Fit for all-weather conditions

Cons

  • Poor cord quality

Our Verdict

The Schumacher SP-200 is a useful solar battery maintainer that trickle charges any 12V battery and effectively charges your batteries without electricity and gives you an excellent all-weather performance.

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Schumacher SP-400 Solar Battery Charger and Maintainer

All-Weather Battery Maintainer for Long Battery life.

Features Highlights

  • Amorphous Solar Technology
  • Lead-acid battery
  • Water-resistant
Extend your battery life with the Schumacher SP-400 solar battery charger and maintainer. The amorphous solar technology and water-resistant panel makes it suitable for any solar device. Check Price on Amazon

Product Specification

  • Dimensions:

    14.4 x 13.6 x 0.5 inches

  • Weight:

    3.96 pounds

  • Power:

    4.8 Watt

  • Battery Voltage:

    12 Volt

Pros

  • Fully water-resistant
  • Lead-acid battery
  • Easy to use and install
  • Amorphous solar technology

Cons

  • Poor cord quality
  • Lack of controller

Our Verdict

The Schumacher SP-400 Solar Battery Charger and Maintainer is ideal for boats, cars, motorcycles, and more and is a convenient unit for both indoor and outdoor batteries. Requiring minimal maintenance, this solar maintainer is environmentally safe and effectively extends your battery life. While you might face issues with the cord, you should purchase a charge controller for extra overcharge protection.

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Nature Power Solar Battery Maintainer

Cost-Effective Solar Maintainer for Your Batteries

Features Highlights

  • Built-in barrier diode
  • Weather-resistant
  • Car adapter included in the set
  • Affordable
  • Easy to install
If you are looking for a cost-effective, affordable, and weather-resistant solar maintainer, the Nature Power Solar Battery Maintainer is the one for you. Check Price on Amazon

Product Specification

  • Dimensions:

    14.4 x 4.5 x 1.5 inches

  • Weight:

    1.5 pounds

  • Power:

    1.5 Watt

  • Battery Voltage:

    12 Volt

Pros

  • Fully weather-resistant
  • Affordable and cost-effective
  • Eco-friendly technology

Cons

  • Not a CE certified product
  • Weak plastic frame
  • Low wattage to maintain a decent level of charge

Our Verdict

Nature Power is an excellent solar battery maintainer at an affordable budget. What you’ll love about it is how easy it is to install. Even if the weak plastic casing and a low wattage are an issue, this unit is easy to use for anyone, especially with vehicles.

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Sunforce 52013 Solar Battery Maintainer

Efficient Maintainer for Healthier Battery

Features Highlights

  • Easy DIY installation
  • Fully weatherproof design
  • Amorphous Solar Technology
  • Built-in Blocking Diode
  • Wide working temperature range
This solar battery maintainer is an easy-to-install maintenance-free unit that includes twin maintainers. These twin maintainers make the Sunforce 52013 ideal for cars, boats, and more. Check Price on Amazon

Product Specification

  • Dimensions:

    20 x 7 x 4 inches

  • Weight:

    3 pounds

  • Power:

    1.8 Watt

  • Battery Voltage:

    12 Volt

Pros

  • Full weather-proof design
  • Easy to install and use
  • Prevents reverse charging
  • Durable and long-lasting build

Cons

  • Low-efficiency suction cups

Our Verdict

Boasting a weather-proof and durable build, the twin maintainers effectively charge your batteries as well as extend its operable time and lifespan. Despite being water-repellant, it is not fully water-resistant, so you might have to be careful while using it.

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Sunforce 50012 Solar Battery Maintainer

Convenient Power Supply for Your Batteries

Features Highlights

  • Suction cups and Alligator clips for easy installation
  • Fully Weatherproof built
  • Built-in blocking diode
  • Durable ABS plastic casing.
Bid farewell to the battery drainage issue with the 1.8 Watt Sunforce solar battery maintainer. Get it, install it, enjoy it. Check Price on Amazon

Product Specification

  • Dimensions:

    4.9 x 0.5 x 13.9 inches

  • Weight:

    1.35 pounds

  • Power:

    1.8 Watt

  • Battery Voltage:

    12 Volt

Pros

  • Varying operating temperature range
  • Easy installation and use
  • Prevents reverse charging
  • High durability

Cons

  • A flaw in reverse polarity design
  • The frame may get very hot in the direct sun

Our Verdict

The Sunforce 50012 is a fair quality maintainer that charges and maintains your battery. However, the reverse polarity design flaw makes the device problematic and can drain your battery instead of charging it. Since this information is not available in the instruction manual, you will need to find an alternative solution.

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Schumacher SP-1500 Solar Battery Charger and Maintainer

Innovative Power Supply Long Performing Battery
The Schumacher SP-1500 will serve your charging needs anywhere, anytime, with its innovative and water-resistant solar technology. Check Price on Amazon

Product Specification

  • Dimensions:

    36.4 x 12.4 x 0.9 inches

  • Weight:

    16 pounds

  • Power:

    15 Watt

  • Battery Voltage:

    12 Volt

Pros

  • Fully water-resistant
  • Lead-acid battery
  • Easy to use and install
  • Amorphous solar technology

Cons

  • The trouble with the reverse internal polarity
  • Lack of controller

Our Verdict

The Schumacher SP- 1500 is an excellent performing solar battery maintainer. However, it is more expensive than the SP- 200 and SP- 400 models despite all the Schumacher models performing the same. The only difference is that the SP- 1500 delivers more power than the other two models.

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Comparison Table for Best Solar Battery Maintainer

S.NSolar Battery MaintainerDimensions (inches)Weight (Pounds)Power (Watt)Battery Voltage (Volt)
1POWOXI Solar Battery Charger and Maintainer14 x 8.5 x 0.82.23.312
2Battery Tender Solar Maintainer with Smart Charging Controller17.8 x 17.8 x 32.5512
3ALLPOWERS Solar Trickle Battery Maintainer16.7 x 11.2 x 1.21.751812
4Schumacher SP-200 Solar Battery Maintainer11 x 2 x 202.42.412
5Sunway Solar Car Battery Trickle Charger & Maintainer13.9 x 0.5 x 51.46412
6Schumacher SP-400 Solar Battery Charger and Maintainer14.4 x 13.6 x 0.53.964.812
7Nature Power Solar Battery Maintainer14.5 x 4.5 x 1.51.51.512
8Sunforce 52013 Solar Battery Maintainer20 x 7 x 431.812
9Sunforce 50012 Solar Battery Maintainer4.9 x 0.5 x 13.91.351.812
10Schumacher SP-1500 Solar Battery Charger and Maintainer36.4 x 12.4 x 0.9161512

Benefits of Solar Battery Maintainers

Solar Battery Maintainers have been around for many years, but very few are aware of its utilities. They view these units as an additional investment. However, the truth is different. There are many benefits of having a solar battery maintainer. We have mentioned the main ones below: 

Fully Charged Battery

In many cases, the battery shows the surface charge to indicate a full charge while it is not actually, which usually happens when you use a high current or boost charge the batteries. Solar Battery Maintainer trickle charges your battery by releasing a small and consistent amount of current. Such charging may take a bit more time, but it will ensure that the battery fully charges.

Optimal Performance

A battery delivers optimal performance if the charge is at an optimum level. You can use the solar unit even if it drains up to 50%. Using a solar battery maintainer ensures the charge never drops below the minimum level; this maintains optimal performance and also extends the battery’s lifespan. 

Peace of Mind 

Battery Maintainer charges the battery when it is running low and maintains a floating status on a full charge. It regulates the charge of the battery even when you are not around to keep track of it. 

Ultimate Buyer’s Guide - Solar Battery Maintainer

Steps of Battery Charging and Maintenance

Solar Battery Maintainer charges and maintains battery charge on eight steps mentioned below: 

  1. Desulphation - It reconditions batteries that have lost power due to long-time non-use.
  2. Soft Start - Charging of the battery until the terminal voltage rises to a preset level.
  3. Bulk - The primary charging step charges the battery below full charge. 
  4. Absorption - This final charging state keeps battery voltage at a preset level. 
  5. Analysis - It suspends the charging phase and measures the voltage.
  6. Recondition - Maintainer feeds a constant current to the battery to ensure maximum voltage.
  7. Float - Maintains a constant voltage level of the battery.
  8. Pulse/Maintenance - Sends a pulse of electricity to the battery when the charge falls below a preset limit, so the battery retains its condition for longer life.

Things To Consider When Buying A Solar Battery Maintainer

Now that we have mentioned the benefits of a solar battery maintainer, you might want to know about the things you must consider when you pick one for your house:

Automatic

Manual settings are challenging to maintain and can be operated only by professionals, so make sure that the maintainer you purchase has an automatic setting. An automatic maintainer charges your battery in fast mode, and then it switches to the top-off mode that slowly brings the battery up to its maximum level. Finally, this setting enables the maintenance mode that keeps your battery at full capacity for an extended time. 

Charge controller

All solar panels need a charge controller between its panel and the battery to prevent overcharging. Some solar panels have built-in charge controllers for battery charging and maintenance. If the unit does not have one, you can buy a kit that includes both the solar charge controller and solar panel.  

Deep-cycle battery maintenance

You must purchase deep-cycle battery maintenance for your solar battery maintainer. It can induce the Equalization and Desulphation phase. This property of the Deep cycle battery maintenance helps to prolong the battery life of your audio equipment, motorized scooter, RV, or even floor sweeper. 

Load Testing

Whenever you have a battery-related issue, it may not be immediately apparent whether the battery is faulty or if it is a problem with the charging system. Choosing a solar battery maintainer with a Load Testing capability helps to identify whether there is an issue with the battery or the charging system.

Mounting

Make sure the maintainer you choose has complete flexibility in angle and azimuth, which allows the solar panel to move automatically in the direction of the sun to produce the most power. 

Single-frequency vs. multiple frequencies

Single-frequency maintainer removes only the newly formed sulfate deposits from the solar panels but fails to recover a heavily sulfated battery. Only a multiple frequency maintainer can remove both old and newly formed sulfate crystals in the shortest time possible. 

Start Assist

This feature in a solar battery maintainer helps you to utilize the dead batteries even if the power has dropped below the starting threshold. 

Spark proof

Spark proof is the connection in a maintainer designed not to produce a current unless it detects a proper connection. Such a smart feature prevents sparks when you connect a charger, thus avoiding fumes and explosions.

Warranty

A solar cell is not a perfect unit, and it might come with one or more damaged cells. To avoid the hassle of replacing the panel frequently, we recommend you pick the solar battery maintainer with the most extended warranty available. 

Waterproof and weatherproof

Solar battery maintainers also need to be robust enough to withstand the harsh off-grid environment such as rain, heat, dirt, and dust. So pick the one that is portable, tough, and IP65-rated for water, dust, and impact resistant.

Frequently Asked Questions

It is a device that induces optimal battery performance. A solar battery maintainer prevents batteries from overcharging and complete discharge. It also improves the charge quality giving you the liberty to run your devices at any time.

A solar battery maintainer, like any other solar device, converts the energy from the sun into electricity. Then it supplies the necessary power to the batteries, and if fully charged, cuts off the power to prevent damages due to overcharging.

Given that solar devices work best during day-time, you don’t necessarily have to put the units under direct sunlight. Unlike low-quality panels, high-quality panels will overcome weather conditions and work well even in cloudy, humid conditions.

Closing Words

Investing in a solar battery maintainer is a smart and easy way to solve your battery-related issues. Before you purchase one, make sure to check its details and features, and refer to the buyer's guide.

Don't forget to check for any extra costs before you plan to make a purchase. This guide to the 10 best solar battery maintainers will also act as your guide, now that you know that getting yourself such decent technological units is a smart choice in itself.

In Hurry? Editor's Choice
Sunway Solar Battery Charger and Maintainer