Best Deep Cycle Battery for Solar 2021

Solar batteries are deep cycle batteries that provide energy storage for solar, wind, and other renewable energy systems. The major difference that a deep cycle battery for solar has from the normal car battery is that they are designed for repeated, prolonged and deep discharges. These kinds of discharges are common in off-grid renewable energy systems.

Deep cycle batteries are efficient energy storage units that effectively allow you to store and use power. These batteries work when a chemical reaction takes place. It leads to the development of a voltage that results in an electric current.

These batteries are made in a way that they can be discharged and recharged as many times as possible. This is the exact opposite of the typical car battery that aims to deliver a burst of energy for a short period. A deep cycle battery for solar can provide power at a steady rate for an extended period.

The 7 Best Deep Cycle Battery for Solar

1. 2 PCS 12V 200Ah LiFePO4 Deep Cycle Battery

Deep Cycle Battery

This deep cycle battery features a built-in BMS that guards the battery against over-discharging and overcharging. The battery is made of Lithium iron phosphate, which makes it eco-friendly. This means that it poses no risk of pollution.

This battery is made in a way that complies with the European RoHS regulations. It has also been certified by SDS and SGS. It has a stable output voltage platform that is 12V for 90% of its capacity usage. It supplies power for an extended period, something regular batteries cannot achieve.

The installation process of this battery is straightforward. This battery can last eight to ten times longer than standard lead-acid batteries. It supports solar panel charging and fast charging.

This deep cycle battery can be connected in either series or parallel and work perfectly. A series connection is ideal for larger capacity and voltage. You can connect about four identical batteries in series and get about 48V.

For parallel connection, you can connect multiple batteries but not exceeding ten of them. When connecting the batteries in the series, you must be keen on one thing. The capacity and voltage must be the same and be of equal or similar age.

The good thing about this deep cycle battery is that it is fifty percent lighter than a 200Ah lead-acid battery. It has no memory effect, no matter the state the battery is in and can be used right after being charged. This battery comes with a ten-year warranty.

Pros

  • It is Eco-friendly
  • It is easy to install this battery
  • It lasts about ten times longer than a standard lead-acid battery
  • It supports solar panel charging and fast charging
  • It is lightweight
  • It comes with a warranty that runs for a whole decade

Cons

  • No particular drawback

2. QTY 2: VMAX SLR125 AGM Sealed Deep Cycle 12V 125Ah batteries

Deep Cycle Battery

This deep cycle battery will offer superior performance for about a decade. It comes with a one-year warranty, which means you shouldn’t be worried about any defects within this period. This battery does not generate any dangerous gases or fumes and is made with 99% recombination capabilities.

Pros

  • It is eco-friendly
  • It is lightweight
  • it has a long life span
  • Easy to install
  • It comes with a one year warranty

Cons

  • After using them for a long time, they may no longer hold a charge.

3. Renogy 12V 200AH

Deep Cycle Battery

This deep cycle battery is made of high purity materials. It is designed in a way that it can reduce the monthly self-discharge rate by about three percent at 25 degrees Celsius. This is about five times lower than their flooded counterparts. It features a patented gel electrolyte and propriety plate.

These ensure excellent recovery capabilities in case there has been an excessive discharge that has happened. This battery features a corrosion-resistant grid that enables it to last in its good shape for about twelve years. It can handle over 750 discharge & charge cycles at fifty percent in cyclic applications.

This deep cycle battery also features an advanced regulator valve and a gel-suspended electrolyte. They ensure that there are no acid leakages. This saves you from additional expenses related to the maintenance of your battery.

Pros

  • It comes with corrosion-resistant grids
  • It features high purity materials
  • It is Eco-friendly
  • It comes with a twelve-year warranty
  • It is easy to install

Cons

  • Does not come with bolts for set up purposes

4. (AGM) Renogy Deep Cycle

Deep Cycle Battery

This deep cycle battery is made with separators that are of thick absorbent glass mat. It features advanced valve-regulated technology. They ensure that there is no acid leakage at all, hence reduces the maintenance cost.

This deep cycle battery also features plate grids that are specially treated and proprietary quinary. They allow plates that allow internal resistance of low intensity. They also help with high current discharge of up to ten times the rated battery capacity.

Besides this, the Renogy Deep Cycle AGM is made of high purity materials. This makes it reduce the monthly self-discharge rate to below three percent at around twenty-five degrees Celsius. This is an incredible fate as it is about five times lower than compared to their flooded counterparts.

This deep cycle battery features a wide temperature range. It can achieve all this because of its improved electrolyte formulae that ensures that battery capacity is stable. It can make an outstanding discharge of temperatures that are even below zero degrees Celsius. A critical thing that one needs to know is that the battery ought to be installed while upright.

Pros

  • It is made of sturdy materials hence will last long
  • It can operate on a wide range of temperatures
  • It has an incredible discharge performance
  • It is easy to install
  • It features advanced valve-regulated technology which prevents ant acid leakage making it maintenance-free.

Cons

  • You should only install this deep cycle battery in an upright position

5. Weize 12V 100AH

Deep Cycle Battery

This deep cycle battery measures 12.09 by 6.65 by 9.17 respectively. It is ideal for Off-grid applications and will do well in an electric mobility scooter wheelchair, Backup sump pump, mini cobra/Kota/Sevylor trolling motor, travel trailer, and RV House Van camping.

It will work well when installed industrial and medical equipment, portable tools, lawn and garden tools, hunting, golf carts, and electric vehicles. It also features advanced valve-regulated technology. This ensures that there is no acid leakage at all, hence reduces the maintenance cost.

This deep cycle battery can offer high performance. It is designed in a way that it can recharge and discharge multiple times and still maintain an extended period of power supply. It comes with a one-month refund policy and a twelve-month warranty. This battery will last for a long time with no alarming issues.

Pros

  • It is long-lasting
  • It is lightweight
  • It is a high-performance battery
  • It is eco-friendly
  • It comes with a one year warranty

Cons

  • No alarming drawback

6. Mighty Max Battery 12v

Deep Cycle Battery

This deep cycle battery is rechargeable and can be mounted at any position. It has the capability of resisting shocks and vibrations impressively. This battery is long-lasting and can perform at both high and low temperatures.

This deep cycle battery can deliver power when you need it. It uses a state-of-the-art calcium-alloy grid that is heavy-duty that enhances its incredible performance.

It features the AGM (Absorbent Glass Mat) technology that has a valve-regulated design. This makes it ideal for use, both indoor and enclosed areas with no leakage risk reducing the maintenance cost. 

The Mighty Max Battery 12V can fit in a variety of applications. They include motorcycles, Medical Mobility, Lawn and Gardening tools, Hunting, Golf carts, Engine starters, Electric Vehicles, consumer electronics, and many more.

Pros

  • It is eco-friendly
  • It is long-lasting
  • It is a high performing battery
  • Will function in both low and high temperatures and be effective

Cons

  • It does not come with mounting accessories

7. Universal Power Group 12V

Deep Cycle Battery

This deep cycle battery is impressive. It can be mounted in any position. This is because it will resist vibrations and shocks. It features thick absorbent glass mat separators. It also features advanced regulated valve technology.

This ensures there is no acid leakage at all, hence reduces the maintenance cost. This battery measures 12.17 by 6.61 by 9.16 inches and weighs around 64 Lbs. Buyers should not be worried about defects once they gain this battery.

This is because it comes with a twelve-month warranty. This means that any defective product will get fixed or the complete unit replaced as well.

Pros

  • It is Eco-friendly
  • It is easy to install
  • Made with sturdy materials that make it resist vibrations and shocks hence durable.
  • It comes with a one year warranty

Cons

  • It may not be able to hold a charge after an extended period of use

8. ExpertPower 12V 20Ah

Deep Cycle Battery

This battery takes pride in maintaining and using your power needs. We know batteries are not used continuously. However, if the need becomes continuous, then the lead-acid gets to be too exhausting and its efficiency gets reduced significantly.

The lithium chemistry of this battery cuts down the weight significantly. It also massively boosts its capacity and performance. This battery does more than just store power. It does more by ensuring the supply of stable power for a long time.

This battery is durable and lightweight, making it ideal for use at home, or outdoors. It can discharge and recharged very many times and still work to its optimum capacity.

Pros

  • It is long-lasting
  • It is a high performing battering
  • It can work at both high and low temperatures
  • It is Eco-friendly
  • It is portable
  • It is durable

Cons

  • This deep cycle solar battery does not have any particular drawback.

Things to Consider When Buying a Deep Cycle Battery for Solar

Size & Weight

The size and weight are important factors to consider when choosing a deep cycle battery. This is especially if you are intending to use the battery on an RV or a watercraft. In such applications, the battery will run different electronic applications for a long.

A lithium-ion deep cycle battery can generate more power and is lightweight when compared to lead-acid batteries. If you get a smaller, lighter battery, you will enjoy more flexibility.

Charging

Deep cycle batteries are made of lithium and iron. This makes them take less time to get charged in full when compared to a lead-acid battery. Some applications require batteries that can charge quickly. For such applications, the use of lithium batteries is recommended. This is because they can charge three times faster than their lead-acid counterparts.

They effectively charge fully in just one session, making the charging process easy. Lead-acid batteries must be charged multiple times to reach full capacity and require close attention and maintenance.

Reliability and Life Span

The greatest benefit of lithium-iron deep cycle batteries is that they are long lasting and require little or no maintenance. A quality lithium-ion battery will seldom need a water refill and will last for over a decade.

They can also self-discharge when put in storage, and even after retrieving them, they will still function properly with no problem. If you need a solid backup battery to power your electronics and light in case of power failure, a lithium-ion battery is an ideal choice.

Final Verdict

From this discussion, we can see the benefits of using a lithium-ion deep cycle battery. They can be recharged hundreds of times and remain stable. These deep cycle batteries have a high voltage capacity, higher energy density, and a very low self-discharge rate when compared to other rechargeable batteries. If you are looking for a deep cycle battery for solar, consider any of those discussed above.

Our top pick however is the 2PCS 12V 200Ah LiFePO4 Deep Cycle Battery. It is a safe and eco-friendly battery that comes with a decade-long warranty. This battery is efficient and can last ten times longer than standard lead-acid batteries. It is lightweight and durable. Having this piece will mean that your power needs are covered.

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