Buyers Guide & Information

Battery Tender Solar Charger Reviewed

We have reviewed and compared the best battery solar chargers on the market. This includes the popular Deltran battery tender model.

Solar energy doesn’t just work well for your home or business but is also useful for keeping your batteries powered.

Deltran makes a Battery Tender Solar model that provides the power you need to keep moving. We will perform a complete Battery Tender solar charger review, so you know what to expect.

Smart Charger Technology

Deltran’s solar Battery Tender uses 3-stage charging technology. The first stage identifies what the battery needs and applies a high voltage to get the majority of the charging completed. The absorption charging occurs once the battery is at 80%. The final cycle is the maintenance charge, otherwise known as a trickle or float charge.

Built for a Variety of Uses

You can use the solar-powered Battery Tender to charge a multitude of batteries. Whether you are running 6V lawnmower batteries or need something for your pickup truck, this brand offers an option that fits your needs.

Reverse Polarity Protected

You can’t possibly hook up the solar panel Battery Tender the wrong way. The sophisticated equipment ensures that no voltage will be sent out if the system is hooked up incorrectly. This safety feature keeps everyone protected.

Spark Free Circuitry

The output clips ensure that there is never a spark when touched together. While you shouldn't touch these two together anyway, it can sometimes occur by accident or when being used by someone inexperienced.

Built-in Temperature Compensation Sensor

With temperature compensation, the Deltran solar Battery Tender can adjust the voltage based on what the readings are. This feature ensures the battery always gets the appropriate charge, no matter what the external conditions are.

Waterproof & Spark Proof

You can use the Battery Tender solar maintainer in any situation. Even if you need to use the charger outside, you won’t have trouble because of the waterproof design. Most other battery maintainers don’t offer this feature.

Battery Tender Solar Charger Reviewed

Battery Tender 5W Solar 12 Volt Battery...
1,827 Reviews
Battery Tender 5W Solar 12 Volt Battery...
  • Output: 12 VDC, 270 mAmp DC, 5W max for...
  • Worry free: Reverse polarity protection,...
  • Great for: Outdoor use, trickle charging, off...
  • Approximate dimensions: 14"W X 16"L X 1"H;...

You can now harness the power of the sun to charge your batteries. This Battery Tender 5-watt solar panel with built-in controller is completely portable and perfect for all battery charging applications.

You can even use it in a storage space that doesn’t have access to power. The built-in charge controller is the equipment needed if you want to prevent overcharging and protect your batteries.

Additional safety features include reverse polarity protection, spark-proof, and weatherproof capability. It also includes the temperature compensation sensor that automatically adjusts the voltage based on conditions. This Battery Tender solar car battery charger is also CE approved.

This 5-watt solar panel only measures three pounds. It is good for all outdoor charging, trickle charging, all-terrain vehicles, and motorcycle uses. You simply won't find a better solar motorcycle Battery Tender. If you require more power, consider looking at the Battery Tender 021 1164 10w solar charger instead.

If you require even more power, there is also a 15-watt solar powered car Battery Tender. This model works best on larger equipment, making it one of the best solar car battery maintainer models.

If money isn’t a concern, this would be the waterproof solar Battery Tender you want in your arsenal. Reading through the Battery Tender solar panel reviews, it’s simple to see what makes these products different than others.

As the best solar car Battery Tender, this model comes with a five-year warranty. However, this model won’t make a good 6 volt solar battery tender and can’t be used as a 24V solar battery tender either.

Product Specifications





Vehicle Service Type

Motorcycles, boats, cars, dirt bikes, lawnmowers, RVs, trucks, SUVs, etc.

Battery Types Supported

Lead-acid and sealed


2.5 pounds

Positives & Negatives of the Deltran Solar Battery Tender


  • Several options available
  • 3-stage charging technology
  • 5-year warranty
  • Temperature compensation sensor
  • Highly rated


  • Only 12-volt models
  • Can be expensive
  • Trouble figuring out which one to buy

Other Solar Battery Tenders to Consider

TP-solar 30W - best solar battery maintainer for RV

On Sale Today
Topsolar Solar Panel Kit 30W 12V...
1,164 Reviews
Topsolar Solar Panel Kit 30W 12V...
  • Perfect for off grid 12 volt batteries...
  • Solar panel kits, package included 30 watts...
  • With the 10A solar charger controller, it can...
  • Small in size and light to take, it is easy...

After you read the solar battery tender review, you want to know if you can save a little money with the TP-solar option instead. This battery charger maintainer features a 10A charge controller and an extension cable. It's a 12V system that's ideal for use with your RV, car, truck, boat, and other applications.

While customers have a lot of positive things to say about this model, the comments can’t compare to the Battery Tender 5-watt solar charger reviews. Plus, there is no information about a warranty, which leads us to believe it might not have one. Still, it’s a great budget-friendly option considering the power.

Schumacher SP-200 - best small budget solar battery tender

On Sale Today
Schumacher SP-200 Solar Battery Charger and...
1,221 Reviews
Schumacher SP-200 Solar Battery Charger and...
  • TRICKLE CHARGE: Delivers 2.4-watt trickle...
  • EXTEND BATTERY LIFE: Maintaining your 12V...
  • SOLAR-POWERED: Solar panel battery maintainer...
  • NO ELECTRICITY NEEDED: Charge the maintainer...

If you want the best solar battery maintainer, you might also consider Schumacher. This is a top brand among battery technology. Most people feel that the price is unbeatable, plus there are tons of options to choose from. This model is a 2.4W charger, but you can also pick a 4.8W, 5.5W, 6W, and 10W model, all at reasonable prices.

The most significant difference with this model is that it's not waterproof, but only water-resistant. If you want to use your solar battery tender for RV in any weather situation, this might not be the best option. Additionally, it only comes with a one-year warranty.

Sunway - Top 5 watt solar tender battery charger

On Sale Today
Sunway Solar Car Battery Trickle Charger &...
5,166 Reviews
Sunway Solar Car Battery Trickle Charger &...
  • [Solar Panel Power Up To 5W]--Keep your 12V...
  • [Pug And Play,Simple And Very Easy to...
  • [Stronger and Durable]--This solar powered...
  • [Charger & Maintainer For Any Rechargeable 12...

There is no comparison between this Sunway model and the Battery Tender solar controller review. While this is a low-price option with reasonably-good reviews, the durability and functionality can't compare with the Battery Tender models. This particular option is rated at 5W, but you can also choose the 1.5W, 4W, and 8W battery maintainers.

This charger works on a variety of battery types and can be plugged into a 12V outlet. Plus, the company offers a one-year warranty. However, the company doesn’t compare to the Deltran brand, which is reputable and has been in business for decades. However, this model comes as a complete kit.

KINGSOLAR 10W 12v - best marine solar battery tender for boats

KINGSOLAR 10W 12V Solar Car Battery Charger,...
204 Reviews
KINGSOLAR 10W 12V Solar Car Battery Charger,...
  • HIGH EFFICIENCY:Chosen High Effficiency Solar...
  • PORTABLE:The Solar Panel Very Thin and...
  • FRIENDLY CHARGING:The Solar Panel Voltage is...
  • WIDELY APPLICATION:Can Charge For All Kinds...

For more functionality over the 5 watt solar battery tender charger for boat, consider the KINGSOLAR option. As with the last option, this one includes a complete kit for more versatility. You can use this on a variety of vehicle types, even your golf cart. Additionally, the price is exceptionally low, but there is only a 10W option.

The customers feel just as strongly about this model as the Battery Tender 5W solar review. Plus, the company offers an 18-month warranty, which is more than some of the others but less than the Battery Tender models. It might also be thinner than most options, making it more portable.

Paladin - best solar motorcycle battery tender

No products found.

This isn't just an excellent option for your motorcycle, but it's also considered a top model as a 12 volt solar battery tender marine battery charger.

The 5W battery trickle charger is weather-resistant, which is not as functional as the waterproof Battery Tender. However, it works on most vehicles, including your RV, trailer, car, truck, motorcycle, and boat.

This also comes as a complete kit, ensuring you get every accessory that you need. However, this 12V solar panel Battery Tender trickle charger alternative doesn’t seem to have a warranty. While you can buy it for a reasonable cost, not having a warranty leaves you unprotected if something were to break early.

Sun Energise - best solar-powered car battery tender

Sun Energise Waterproof 12V 20W Solar Battery...
350 Reviews
Sun Energise Waterproof 12V 20W Solar Battery...
  • [Intelligent Charge] Innovatively built-in...
  • [Full Protections] Prevent battery from over...
  • [Durable & Strong] Made of durable and strong...
  • [Easy to Monitor] The LED indicator clearly...

If you want maximum versatility, this 20W battery charger might be the best option. It does have a slightly higher price, but the reviews prove that it’s worth the expense.

Not only do you get a smart charger that won’t hurt the battery, but it’s also waterproof. Plus, there’s an easy to understand LED indicator that shows you the charging status at all times.

If this model doesn’t work for you, consider one of the company’s other options. You can choose the 5W or 10W solar battery maintainer instead. While these other models will provide plenty of functionality, you can actually save a little money by downgrading.

ALLPOWERS - most portable solar panel battery tender

ALLPOWERS 18V 12V 5W Portable Solar Panel Car...
2,283 Reviews
ALLPOWERS 18V 12V 5W Portable Solar Panel Car...
  • ☀️ ALLPOWERS trickle battery charger...
  • ☀️ Mono-crystalline silicon panel works...
  • ☀️ Works with automotive, motorcycle,...
  • ☀️ Built-in blocking diode to prevent...

One of the cheapest models is this 12V/18V charger from ALLPOWERS. It is durable and ready to power up your batteries, whether for your ATV, lawnmower, truck, car, motorcycle, or RV. It is also a complete kit, supplying everything you need to get reliable power.

There are additional charging options if you want a 7.5W or 10W solar battery charger. Not only does this reputable company supply an 18-month warranty, but there is exceptional customer service offered if you need help. The current reviews prove that customers are satisfied with both the charging capability and the company itself.

Renogy - best cheap solar trickle charger

Renogy 5W Solar Trickle Charger Portable...
1,143 Reviews
Renogy 5W Solar Trickle Charger Portable...
  • 【Plug & play, work with diverse...
  • 【Charge & maintain all kinds of 12...
  • 【High efficiency, long service...
  • 【Portable design, easy to install】Small...

Renogy is a top brand in the charging sphere. This particular trickle charger comes in a variety of options, perfect for many applications. This model is rated at 5W, but you can also choose the 8W, 10W, and 16W chargers. No matter which one you pick, you won't have to pay a high price.

This maintenance-free charger is simple to use and doesn’t take a lot of effort to connect. It’s also a durable charger but doesn’t provide the waterproof protection of the Battery Tender. Plus, the company only provides an 18-month warranty, which is good but can’t compete against Deltran.

Solar Battery Charger Applications & Uses Supported

When you purchase a solar battery charger, there are endless ways to use it. These models are ideal for outdoor use, trickle charging, off-road motorcycles, and all-terrain vehicles. You don't need to be near a power source to get your batteries charged. Instead, simply harness the power of the sun, which is almost always available.

Deltran provides a variety of solar panel options geared toward different applications. You can choose from the 5 watt solar panel, 10 watt solar panel, or 15 watt solar panel. All of these are rated for the 12V batteries, whether they are AGM sealed or lead-acid.

Tips for Using Solar Battery Maintainers Effectively

If you plan to use a solar battery charger with alligator clips, here are a few tips.

  • Choose a ground location that is free from dirt and debris.
  • Connect the red clip to the battery’s positive terminal.
  • Connect the black clip to the ground you choose.
  • Position the charger so it faces the sun.
  • Keep it connected until the battery is completely charged.

You may also have to rearrange the charger panels as the sun moves.

People Also Ask (FAQs)

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

One solar panel is able to charge your 12V battery, but you might require other accessories to distribute the power to the cells.

How long does it take for a Battery Tender Solar charger to charge a car battery?

It depends on the size Battery Tender you choose and how much of a charge your car battery requires. You should set aside a couple of hours at a minimum.

Can I use a Battery Tender solar charger to charge a dead battery?

If there is no charge at all in the battery, you might need a replacement, or you can attempt to recondition batteries. However, the sun’s energy is ideal for keeping the battery charged and keep it from discharging while in storage.

Can a solar charger overcharge a battery?

If it contains smart charging technology, like the Battery Tender, it will automatically switch to a maintenance mode when the battery is fully charged. This technology prevents the battery from becoming overcharged.

How should one take care of a solar battery charger?

When you aren’t using the battery charger, you should store it in a dry location. You can also keep the equipment free of debris and dirt. Plus, before using any charger, you need to inspect the equipment first and replace it whenever something looks worn or torn.

What is the difference between the cheap and more expensive models on our list?

The more expensive solar battery chargers often come with more accessories or have more power capability. However, there are plenty of cheap solar battery chargers that do a great job. Just purchase yours from a reputable manufacturer that offers a decent warranty.

Where is a good place to purchase a solar charger?

We recommend purchasing all battery chargers, including the solar-powered options, from Amazon. This site offers the largest selection at some of the lowest prices. Plus, you can easily read through the customer reviews to see which ones are the best. If you can’t find the model you want on Amazon, consider looking at the Battery Tender website instead as it another reliable source for finding these products. 


If you are in need of a solar battery charger, you want to consider the options from Battery Tender. This company is a top-rated option with a variety of models to choose from.