Solar Deep Cycle Batteries

Best Solar Deep Cycle Batteries

Those of you who love to live off-grid or have the passion to drive around the country in an RV, you need to get yourself equipped with a reliable solar power system otherwise things will soon go haywire. Just having solar panels is not enough when you are living off the grid, you need to have deep cycle batteries to store that extra energy for future use unless you don’t mind living like a caveman without having any access to energy. Now, finding the right solar deep cycle battery is not that easy. To make your job easier here we have listed the best and the most popular deep cycle solar battery that money can buy –  

Solar Deep Cycle
Batteries Reviewed

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1. Renogy Deep Cycle AGM Battery

Using solar powered devices is a prudent idea. However, you need to pick the right type of battery for utilizing such devices and extracting the most out of them. This Deep Cycle AGM Battery suits daily power needs and backup power well. Renogy Deep Cycle AGM Battery is built rugged and it features a leak-proof and spill-proof design.

Renogy Deep Cycle AGM Battery has minimal maintenance needs and installation is not complicated either. It can be used with off-grid solar system as well as different types of solar powered vehicles. The monthly self-discharge rate of Renogy Deep Cycle AGM Battery is lower than that of competing products. Thanks to Improved electrolyte formula, Renogy Deep Cycle AGM Battery performs well even at low temperatures.

2.ExpertPower Rechargeable Deep Cycle Battery

The deep cycle batteries are ideal to run off grid solar devices and power solar powered vehicles of varying types. However, you need to pick the right battery. This efficient 12v 33ahSealed Lead Acid Battery is something you can rely upon. The non-conductive ABS plastic body ensures enhanced durability.

The material thwarts shock, vibration and heat well. ExpertPower Rechargeable Deep Cycle Battery can be used with Snowmobiles, All-terrain-vehicles etc. ExpertPower Rechargeable Deep Cycle Battery is mostly maintenance Free and one time installation is all you need to obtain the benefits. ExpertPower Rechargeable Deep Cycle Battery operates under a wide temperature range. You will get optimal performance owing to use of Absorbed Glass Mat technology.

3. Weize Rechargeable SLA Deep Cycle Battery

The deep cycle batteries are deemed ideal to power solar off grid systems as well as vehicles run by solar energy. This Weize Rechargeable SLA Deep Cycle Battery makes use of calcium-alloy grid. It’s advanced Absorbent Glass Mat technology and valve regulated design makes the battery well suited for use both outdoors and indoors.

You can use this Weize Rechargeable SLA Deep Cycle Battery with Kayak Trolling Motor, Electric Vehicles, Travel Trailer, Garden Tools and Emergency Lighting etc. It weighs 57 pounds and you get 1 year warranty on the product. Weize Rechargeable SLA Deep Cycle Battery needs minimal maintenance and longevity will not be an issue.

4. Universal Power Group Solar AGM SLA DEEP Cycle Battery

Solar devices require proper Deep Cycle Rechargeable Batteries for optimal performance. This is more applicable for running those off-grid solar powered applications. For a hassle free experience, choose this model. Universal Power Group Solar AGM SLA DEEP Cycle Battery can be used to operate a broad range of products and applications including Home Security Systems, Electric Scooters, Lighting Equipment, UPS, Home Alarm Systems, and Solar Collectors etc.

It is a high quality battery with an impact resistant ABS casing. Universal Power Group Solar AGM SLA DEEP Cycle Battery resists hazards like heat, shock, vibration. Owing to Absorbed Glass Mat Technology, it copes with wide temperature range. Universal Power Group Solar AGM SLA DEEP Cycle Battery does not need any such maintenance and that means, you will not have to shell out your hard-earned money on its maintenance.

5. Mighty Max Battery AGM DEEP-Cycle Rechargeable Battery

Are you in need of a heavy duty and reliable deep cycle rechargeable battery to power your solar powered cars or an off grid solar application? Then, look no further than this amazing battery. It is based on robust calcium-alloy grid. Mighty Max Battery AGM DEEP-Cycle Rechargeable Battery is built on Absorbent Glass Mat technology. Its valve regulated design is perfect for outdoor and indoor usage needs.

Mighty Max Battery AGM DEEP-Cycle Rechargeable Battery can be used to run a variety of applications and devices like Electric Vehicles, Motorcycles, Emergency Lighting devices and more. You need no mounting accessories.

Mighty Max Battery AGM DEEP-Cycle Rechargeable Battery can withstand shocks and vibration well. It also operates in wide temperature range. You actually get a couple of batteries in this unit. The unit weighs only 8.38 pounds and so carrying it to many places will be easy. You get 1 Year warranty as well.

6. Vmaxtanks VMAXSLR125 AGM SLA Rechargeable Deep Cycle Battery

Vmaxtanks VMAXSLR125 AGM SLA Rechargeable Deep Cycle Battery has got amazing storage capacity and should last long. The plates are made from military-grade materials and should last at least 8 to 9 years without causing any trouble whatsoever. The best thing about this Vmaxtanks VMAXSLR125 AGM SLA Rechargeable Deep Cycle Battery is that it can be plugged into a solar system seamlessly and it also does not demand much maintenance from the users. It does not emit any poisonous gases or fumes and that means, it is incredibly safe to use.

7. ExpertPower 12 Volt 35AH Rechargeable Gel Type Deep Cycle Battery

ExpertPower 12 Volt 35AH Rechargeable Gel Type Deep Cycle Battery is basically a maintenance-free battery that can be hooked up to a solar panel and the system will be up and running in a few minutes. You can get it mounted in any position you like and it will still offer superior performance. It can easily absorb vibration and shocks. Regardless of the temperature fluctuations, ExpertPower 12 Volt 35AH Rechargeable Gel Type Deep Cycle Battery will continue to offer optimal performance. If you wish you can always add additional extra electrolytes to increase its lifespan. ExpertPower 12 Volt 35AH Rechargeable Gel Type Deep Cycle Battery does not leak and requires little to no maintenance.

ExpertPower 12 Volt 35AH Rechargeable Gel Type Deep Cycle Battery should last 10 years. After each deep cycle use, this battery recovers very fast. Compared to AGM sealed batteries, ExpertPower 12 Volt 35AH Rechargeable Gel Type Deep Cycle Battery can dissipate heat more efficiently and effectively.

Deep Cycle Batteries: What Are They?

Deep cycle solar batteries look very similar to that of car batteries but they function in a very different way. Car batteries are known to provide short bursts of energy whereas deep cycle batteries are known to provide steady energy for a longer period of time. Though you can discharge deep cycle batteries up to 80 percent, yet manufacturers advise not discharging lower than 45 percent. The lifespan of the solar deep cycle battery can get shortened if you continue to let it discharge it below the recommended 45% discharge level.

Solar Batteries: How Do They Work?

Solar batteries store all the extra energy that gets generated by the solar during the right. When the sun goes down, this stored energy is then utilized to power electrical appliances. If you want to store more solar energy to utilize it later, you have to opt for a solar battery that comes with high storage capacity. However, in order to get it to work, you will require some additional parts like – a solar inverter, a solar charge controller, and of course, some solar panels.

First, you have to connect the solar panels to the charge controller. By doing so, you can monitor the amount of energy that the battery is storing and avoid overcharging. Also, if the batteries deplete, the charge controllers will shut down the system. Plus, you have to connect the battery to the inverter for the conversion of the DC energy that the solar panels collect to AC energy for powering your appliances.

It makes no sense to send the extra energy back to the grid because the US government is not going to pay you for that. So, if you feel that the solar panels are producing more energy than what you would really need, you need to store that excess energy in solar batteries that can be utilized later. if your batteries are completely charged and the panels continue to produce energy, the electricity returns to the grid.

Types Of Batteries?

Here we are going to review four different types of solar batteries that you can be paired with a residential solar system –

Flow Batteries

Relatively new, Flow batteries are making a splash in the industry by allowing homeowners to reliably store solar power. These Flow Batteries contain two separate tanks through which the water-based electrolyte liquid flows. Once connected to the solar system, chemicals inside start reacting with one another and this is what helps the battery to store the energy for future use. However, there is a problem with this flow battery and that is, this type of battery tends to be bulky and they are a bit on the expensive side. Therefore, it is a wonder that Flow batteries are not that much popular among residential users as they are a bit pricy and take up a lot of space.

Designed for large-scale installations, Flow Batteries are ideal for large scale installations.

The biggest benefit of using Flow batteries is that you can use all the energy that it manages to store inside and that too without affecting the health of the battery adversely. Another major advantage of using Flow Battery is that they are fire-resistant and that means, you don’t have to deal with complex things like a thermal runaway. They don’t need much maintenance either and the biggest advantages of them all is the fact that they can last 30 YEARS. Yup, you have heard it right. No Typo here! However, the low charge and discharge rate is definitely an issue with these Flow Batteries.

Nickel Cadmium Batteries

Unlike other types of solar batteries, Nickel Cadmium Batteries are not being widely adopted so far by homeowners. They are considered to be old and obsolete but nothing can be farther from the truth.  Nickel Cadmium Batteries first made its public appearance in the late 1800s but they got a major facelift and technological, upgradation in the 1980s. Nickel Cadmium Batteries now can store more power than ever but they are still ignored by people for some unknown reasons. Widely used in the aircraft industry, Nickel Cadmium Batteries are extremely durable and withstand extreme changes in temperature. What is even more amazing is the fact that these batteries are basically maintenance-free. However, Nickel Cadmium Batteries do have some drawbacks as well and the chief among them is that it is not safe to use. It contains toxic chemicals and therefore, you have to be 100% certain that you can stay away from its toxic chemicals, then only you can think of installing Nickel Cadmium Batteries in your residence otherwise, you will be better off without it.

Lithium-ion Batteries

Lithium-ion batteries are relatively new and they are mainly used in the automobile industry but that does not mean that you can’t get them to attach to your home’s solar system. One of the biggest advantages of using Lithium-ion Batteries is that they don’t require any such maintenance. Unlike Lead Acid Batteries, Lithium-ion Batteries can store more energy per square inches. It boasts of a high battery energy density which is impressive. Another major advantage of using Lithium-ion Batteries is that they can last really long like 10 years. A higher depth of recharge makes it possible for users to extract all the stored energy from this battery without causing any damage to it.  However, Lithium-ion Batteries are a bit expensive and they are also not that much good at putting a stop to issues like a thermal runaway. Lithium-ion Batteries are widely popular of late as they are considered the best choice when it comes to residential solar installation.

Lead Acid Batteries

Lead Acid Batteries are probably the oldest form of solar batteries that have managed to remain relevant even today. They were invented in the early 1800s but managed to stick around because of their versatility and reliability.  Tried and tested, Lead Acid Batteries are available in two different variants – sealed lead-acid batteries and flooded lead-acid batteries. The biggest benefit of using Lead Acid Battery is that they are mostly available for the cheap and they can be recycled quite efficiently. However, Lead Acid Batteries demand regular maintenance and the absence of which might lead to poor performance or leakage. Moreover, they need to recharge every now and then which is a big problem and if that is not enough, these lead-acid batteries also have a low depth of discharge.

Deep Cycle Solar Battery Buying Guide

Here are some factors that you need to carefully consider before making the final decision when it comes to purchasing the right deep cycle solar battery for your energy requirements –  


Battery capacity determines the amount of energy that can be stored within. If you’re looking to power your electrical appliances for long durations, go with batteries with high energy storage capacity or simply large batteries. The unit of measurement of energy capacity is total amp-hours.


The voltage of the battery bank has to be compatible with the solar panels and the solar system already in place. Majority of solar panels come in either 24v or 12V models.

The 12v varieties are popular because most boats and RVs use 12v battery banks and that means if you go for 12v variant, you would not have to face any compatibility issue.  

With a higher voltage battery bank, you can save money in the long run because you would not need that many solar charge controllers and also you don’t have to use thick cables. If your energy requirements are beyond 3KW, then the 48-volt systems are advisable. The large-sized off-grid home ones work on 48v.

Life Cycle

The cycle life refers to the number of charge and discharge cycles of the battery before the capacity falls lower than the stipulated capacity. The capacity of different batteries tends to vary owing to the kind of technology that is used: the capacity of batteries is calculated in cycles.


The prices of batteries can vary – ranging from approximately $100 for the lead-acid battery to over $1500 for a lithium-ion battery. Also, you must take into account the lifetime costs and not only upfront expenses; lead-acid batteries need to be replaced before the lithium-ion ones. More so, you need to incur more on maintenance for the flooded lead-acid battery.

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