The 5 Best Deep Cycle Batteries for Solar Energy Storage (2023)

The world has experienced numerous energy crises in the years since the industrial revolution. But it's never been as bad as it is now.

The main reason for our current predicament is over-reliance on fossil fuels. Global energy demand appears to be growing at an alarming rate, which is not surprising. What is surprising is the way we continue to hold on to fossil fuels and refuse to let go, despite knowing the negative consequences of our actions for more than half a century!

There have been some positive trends in the energy sector over the past decade or two. Solar energy is gaining a foothold in power generation, backed by all the financial incentives and rebates on offer. This is definitely a positive development, although solar energy has numerous challenges ahead.

One of the biggest challenges for solar energy is intermittency. Since solar energy is completely dependent on sunlight, it grinds to a halt during the night hours. This single setback adds a whole host of dimensions to the challenge.

All the problems of solar energy unreliability can be overcome like the wave of a magic wand with a solar battery. These are devices that store energy produced when the sun is shining, for use when it is not.

coupling aInstallation of solar panelsWith a solar battery or battery bank, you can get the freedom you want from fossil-based grid power.

Before you buy solar batteries, you need to understand them better in order to make an informed choice. This article examines the world of solar batteries, particularly deep-cycle batteries, and provides answers to your questions on the subject. Also, in this article, you will find a list of the 5 best deep cycle batteries for storing solar energy. The information here will help you find the best solar battery for your needs.

Solar batteries for the solar panel system

A battery is an electrical device used to store electricity. Just as a water tank stores water for later use, batteries store energy for later use. It should be noted that batteries themselves do not produce electricity.

When power is supplied to the battery, it converts the electrical energy into chemical energy and stores it. This process is called loading. When you want to draw power from the battery, it discharges the energy stored in it after converting the chemical energy back into electrical energy.

types of batteries

Batteries are classified according to both their application and their construction. Examples of batteries depending on the application are marine, automotive (starting), and deep cycle batteries. The main types of batteries are lithium-ion, flooded lead-acid, sealed lead-acid, gel and AGM (absorbed glass mat) batteries.

Any of the battery types listed above can be used as a solar battery. They differ in use, benefit, price, lifespan, features and more. There is no easy answer to the question, “Which of these are best for solar support?” You need to consider the various factors and your requirements to arrive at this answer.

Among application type batteries, car batteries are only used for starting and running engines. Deep cycle batteries are designed to discharge up to 80% of the stored energy and can be charged and discharged multiple times. A ship's battery is a hybrid of the two. Of these three, deep cycle batteries are best suited for interfacing with solar arrays.

Some More Things You Should Know About Deep Cycle Solar Batteries

When buying solar batteries, remember that the battery must match the solar panel. If you have a 12V solar panel, you should pair it with a 12V solar battery. Although 12V is the most common among solar panels and solar batteries, there are also 24V solar panels on the market.

Here are some more features to check in the battery before buying.

Rating: This is an indication of the amount of energy the battery can discharge at one time. It is given in kilowatts (kW). This will give you an idea of ​​how many devices you can use at the same time.

Capacity: The solar battery storage is the maximum amount of energy that the battery can store. This gives you an idea of ​​how long the stored energy will last.

Roundup Efficiency: This is an indication of the battery's conversion efficiency. For example, if 100 watts of energy are fed into the battery and the battery can output 80 watts, the battery's round-up efficiency is 80%. The higher the percentage, the better for you.

Lifetime: This is measured using three different criteria – years of operation, throughput and discharge cycles. Throughput is the total amount of energy that the battery can handle over its lifetime.

(Video) 10 Best Deep Cycle Solar Batteries 2020

Chemistry: This is an aspect of the battery that has a say in most of the factors above. The chemistry of a battery refers to the actual chemical compound used in the battery to store energy.

How do you choose the right battery for your solar system?

In addition to the technical aspects of the batteries listed above, you must also consider these points when choosing solar batteries.

  • Ease of installation
  • Time required to charge
  • your budget constraints
  • The duration of the warranty offered by the manufacturer

The 5 best batteries for storing solar power

1. Renogy 12 V 100 Ah LiFePO4 Deep Cycle Lithium-Batterie

The 5 Best Deep Cycle Batteries for Solar Energy Storage (1)

One of the most trusted battery manufacturers, Renogy presents this perfect companion for yousolar panels. As a lithium-ion battery, it has a long service life of more than 4000 charging and discharging cycles. That's a lot compared to flooded lead-acid batteries.

This Renogy solar battery features 100Ah continuous discharge current, wide operating temperature range and auto-balancing function. It is equipped with an intelligent battery management system to prevent overcharging, overheating and short circuits, and monitors and manages the charging and discharging process.

Because it is a deep cycle lithium-ion battery, it is lighter and more portable than lead-acid batteries. With the activation switch, you can switch to shelf mode to lower the self-discharge rate. The real-time monitor helps to link different devices in the system and allows you to monitor the real-time charging status in the Renogy DC Home app.


  • Long lifespan
  • Great job
  • Geringe Selbstentladung
  • Protection against anomalies
  • Auto balancing function
  • real-time monitoring

2. Vmaxtanks VMAXSLR125 AGM 12V 125Ah SLA Rechargeable Deep Cycle Battery

(Video) Top 5 Best Batteries for Solar Power Storage Review in 2022

The 5 Best Deep Cycle Batteries for Solar Energy Storage (2)

This deep cycle 125 Ah battery is manufactured using AGM technology. This isn't as efficient, light or sophisticated as lithium batteries, but the main advantage is the price difference. But that's a step up from lead-acid batteries.

Vmaxtanks AGM battery features military grade and custom made plates for excellent cycle life. The high-performance plates offer additional service life and an extended range of performance. Whether for everyday use or as an emergency power supply, this battery is designed for high-performance applications.

This AGM battery is designed to withstand repeated charging/discharging and still remain charged. In standby mode, its self-discharge is minimal or negligible.

Because the battery is sealed, you don't have to worry about leakage. Unlike lead-acid batteries, no maintenance is required. There is no need to add water or check the specific gravity of the electrolyte.


  • Well built battery
  • Long lifespan
  • Maintenance free
  • Leak proof
  • 99% recombination to ensure no toxic fumes
  • Ideal for lateral or oblique positioning

3. WindyNation 100Ah 12V AGM Deep Cycle Solarbatterie

The 5 Best Deep Cycle Batteries for Solar Energy Storage (3)

(Video) The Best Solar Batteries: What You Need to Know Before You Buy // Off Grid Power Systems

A great product from one of the most trusted solar battery brands around. This AGM battery from WindyNation is the best AGM battery for solar and a perfect addition to your home solar system, especially if you want to avoid the maintenance hassle of lead-acid batteries and the exorbitant price of a lithium-ion battery.

This sealed lead-acid battery contains 99.995% pure lead to give you extra power and longer life. Specifically designed for use with solar systems, this AGM battery can be used in a variety of environments - off-grid, marine, RV and portable applications.

The high-performance plates in this battery are designed for deep discharge and repeated charging.

If your energy needs are low, this WindyNation model is a great option. Reliable brand name, affordability and low maintenance are the main selling points of this deep cycle AGM battery.


  • Affordable
  • Low maintenance
  • Low discharge
  • Lifespan of 10-12 years
  • Leakproof and non-spillable
  • 1 year warranty

4. Universal Power Group 12V 100Ah Solarwind AGM SLA Deep Cycle VRLA Batterie

The 5 Best Deep Cycle Batteries for Solar Energy Storage (4)

This sealed lead-acid battery is an excellent choice when you are looking for a battery that can be placed in any awkward position. Despite being a simple model, it offers the flexibility to even turn it upside down.

This almost maintenance-free battery is ideal for working with solar panels for 24×7 power supply even for off-grid users. The affordability of this battery is one of the main reasons for its immense popularity in solar homes.

Unlike most other AGM batteries, this one offers a range of voltage options - 12V, 24V and 48V. This would be helpful for at least some with unique setup needs.

This leak-proof battery is designed for intensive use. It is shock and vibration resistant.


  • budget friendly
  • Reliable and durable
  • Compatible with a wide range of devices
  • Easy to install
  • Ideal for continuous use
  • 1 year warranty
(Video) Best Batteries for Inverter in 2022 [Top 5 Review] - Deep Cycle 12V 100Ah Solar Gel Battery

5. Battle Born Batterien LiFePO4 Deep Cycle Batterie

The 5 Best Deep Cycle Batteries for Solar Energy Storage (5)

This lithium ion battery from Battle Born stables is the best deep cycle battery for solar, especially for those who want a safe and stable 12V cycle battery for solar system. The lithium-ion technology used in this battery gives it flexibility in positioning, exceptional durability and reliability. This inexpensive and lightweight battery is made from 100% non-toxic materials.

The built-in battery management system provides the battery with excellent protection against temperature fluctuations and ground faults. It also shuts off battery usage when the charge within it reaches unsafe levels.

Battle Born's LiFePO4 battery offers 100Ah of continuous output and can be used with 12V, 24V, 36V and 48V systems. This lightweight battery can be charged quickly and lasts for 3000-5000 cycles. This is a true deep cycle battery with 100% depth of discharge.


  • Lightweight and versatile
  • Fast charging
  • 100% depth of discharge
  • Can withstand temperature changes
  • 3000-5000 cycles
  • 8 year full replacement warranty

bottom line

Buying a solar battery is not like buying groceries at the supermarket. If you don't invest some time to understand your expectations and the system requirements of your solar array, you may end up with an unsuitable or unwanted battery.

(Video) Best Batteries for Solar Power System

All you have to do is check the basic specifications to make sure the battery fits your solar system and can meet your energy needs.

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Which battery is most suitable for solar energy storage? ›

What are the best batteries for solar? Batteries used in home energy storage typically are made with one of three chemical compositions: lead acid, lithium ion, and saltwater. In most cases, lithium ion batteries are the best option for a solar panel system, though other battery types can be more affordable.

Are deep cycle batteries good for solar? ›

If you want to access renewable energy after the sun goes down or during a power outage, you will need to invest in deep cycle batteries. Deep cycle batteries are specifically designed to provide reliable and efficient power in solar and other renewable energy systems, while car batteries are not.

What are 3 drawbacks to storing solar energy in batteries? ›

Disadvantages of A Solar Battery
  • Energy Storage is Expensive. The cost of energy storage is quite high and can quite easily increase the cost of your solar PV system substantially. ...
  • Increased Complexity of Your Solar System. ...
  • Increased Maintenance For Your Solar. ...
  • Lifespan of Home Battery.
May 3, 2018

What are the 4 types of solar batteries? ›

There are four main types of batteries used to store solar energy — lead-acid, lithium-ion, flow batteries, and nickel cadmium.

What to look for when buying a deep cycle battery? ›

What To Look For In A Deep Cycle Battery
  • Weight & Size. Weight and size are important considerations if you intend to use your deep cycle battery on a watercraft or RV, where you'll need to run several different electronic applications for extended periods of time. ...
  • Charging. ...
  • Life Span & Reliability.
Sep 28, 2015

Is there a difference between deep cycle and marine deep cycle battery? ›

Deep cycle batteries can be entirely drained and recharged many times over, where as cranking batteries can't. Deep cycle marine batteries are much less likely to overheat since their thicker plate construction can withstand high temperatures during heavy currents.

What is the most advanced battery? ›

Most Advanced Battery Technologies That Will Power the Future
  • New-Generation Lithium-Ion Battery.
  • Lithium-Sulfur Battery.
  • Saltwater Battery.
  • Solid State Battery.
  • Cobalt-Free Lithium-ion Battery.
Jan 22, 2023

How big of a solar panel Do I need to charge a deep cycle battery? ›

Based on the earlier calculation, a 100 watt panel will produce an average of about 30 amp-hours per day (based on an average sunny day). This means you would need three 100 watt solar panels or one 300 watt panel to fully recharge your battery on the average day.

How long do deep cycle solar batteries last? ›

How Long Does a Solar Battery Last? Home solar battery units last anywhere between 5 and 15 years. If you decide to install a solar battery today, it's almost certain you'll need a replacement in the future to match the 20- to 30-year lifespan of your solar power system.

How many deep cycle batteries does it take to power a house? ›

A 400 amp-hour 6 volt battery can provide around 2.4 kilowatt hours of power. A three-day battery bank planned to provide 90 kilowatt-hours of electricity to an average American household. The previous example battery can provide2,4 kilowatt hours, while 38 batteries would be needed.

How many batteries do I need for a 5000 watt solar system? ›

Most 5kw solar system off grid contains an inverter that runs from 96 to 120 volts. You need a 6 x 200ah battery bank if your system generates 20 kilowatts daily. The necessary battery bank will be less as your daily energy usage increases. There are batteries to store any excess power that is not being used.

How many batteries should I have for my solar system? ›

If you want to save the most money possible, you'll need enough battery storage to cover your energy usage when your solar panels aren't producing – somewhere around 2-3 batteries. If you want to keep the power on when the grid is down, you'll usually just need one solar battery.

What is the best solar battery for cold weather? ›

LiFePO4 or LFP batteries are suitable for almost all conditions(temperatures ranging from -4°F to 140°F(-20C to 60C)). Lithium batteries are an excellent alternative for continuous, dependable power for off-grid solar, RV, and Camper Van owners who live or travel in extremely cold climates.

What happens to solar power when batteries are full? ›

Should the battery bank become full, it will stop absorbing power from the solar system. The solar panels will continue to generate voltage, but that voltage will not be used or stored until there is available energy demand, or battery space.

Is it better to have more batteries or more solar panels? ›

By adding battery storage onto your Solar Panel system you will be able to use more of the energy your Solar Panels generate. Resulting in greater savings and less green energy waste. As a solar battery stores energy generated in peak sun-hours, you will have a continuous supply of renewable energy throughout the day.

What is the cheapest way to store solar energy? ›

Lead-acid batteries are currently the cheapest option for solar energy storage, but they're short-lived and not as efficient as other options. Lithium-ion batteries offer the best value in terms of cost, performance, lifespan, and availability.

How many batteries do you need for a 400-watt solar system? ›

How Many Batteries Do I Need for a 400-Watt Solar System? As long as your battery bank can store at least 200Ah (amp hours), you could utilize anywhere from one to four batteries. In other words, if you purchase a 1 kWh battery that can manage 200Ah, you'll just need that one battery.

Which lithium-ion battery is best for solar? ›

1. Battle Born LiFePO4. Battle Born LiFePO4 lithium-ion batteries are the top pick because each battery is versatile, cost-effective and easy to install. You can also use them for other off-grid or off-road applications, including powering campers, golf carts and boats.

What is the difference between a solar battery and a deep cycle battery? ›

The battery connected to your solar power system that works as a backup power supply is the Solar battery. It stores the excess energy of the system and gives it back when needed. Now, on the other hand, deep cycle batteries are particularly famous for providing a continuous power supply over a long period.

How much does a good deep cycle battery cost? ›

Deep Cycle Battery Price

Absorbent glass mat battery (AGM) can range anywhere from $80 to $1,000. The price varies, depending on the type, volt and amp-hour.

What is the difference between a 24 and 27 deep cycle battery? ›

Group 24 vs group 27 deep cycle batter over time

Both groups 24 and 27 are made up of an electrolyte solution with lead and anode plates. The only difference between them is that group 27 has thicker plates than group 24.

What is the average lifespan of a deep cycle battery? ›

Most deep cycle batteries can last up to six years with proper care and charging (depending on the frequency of use). It's up to you to make sure that your battery isn't being damaged by your charging routine.

Are lithium deep cycle batteries better? ›

They often have the best combination of performance, safety, cost, reliability and environmental characteristics for RV and marine applications. One of the key benefits of LiFePO4 batteries is the longer cycle and shelf life when compared to the current deep cycle lead acid batteries.

Are lithium batteries better than deep cycle batteries? ›

The superior depth of discharge possible with lithium-ion technology means that lithium-ion batteries have an even higher effective capacity than lead acid options, especially considering the higher energy density in lithium-ion technology mentioned above.

Which is better AGM or deep cycle battery? ›

The AGM battery has a better build quality and is more durable than the deep cycle battery. The fiberglass mats sandwiched in the lead plates are snugged in, making the battery shock and vibration-resistant. This durability and resistance make the AGM battery a top pick in motorsports.

What is the holy grail of batteries? ›

The new type of battery I am working on — the lithium metal battery — is the “holy grail” of battery technology because it could provide the highest possible energy density, potentially double that of lithium-ion batteries. This means we could get double the mileage of an EV on a single charge.

What company has the forever battery? ›

Forever batteries have arrived.

But believe it or not, QuantumScape stock is far from the only solid-state battery stock out there with millionaire-maker potential.

Can a solar battery be too big? ›

An oversized solar battery could also lead to chronic undercharging and poor performance and lifespan. Search tool allows you to specify exactly what elements of a home should be powered by the battery.

How many solar panels can charge a 12V 100Ah battery? ›

Summary. You need around 220 watts of solar panels to charge a 12V 100Ah lead acid battery from 50% depth of discharge in 5 peak sun hours with an MPPT charge controller.

How many batteries do I need for a 200 amp solar system? ›

Depending on the battery type and capacity, a 200-watt solar panel can charge 100Ah of battery capacity every 2.5 hours. On a sunny summer day with 7.5 hours of direct sunshine, a 200-watt solar panel can charge three 100Ah batteries, two 150Ah batteries, or one 300Ah battery.

How long does a 200Ah deep cycle battery last? ›

200Ah batteries will last from anywhere below 1 hour (running 2000W devices) to over 200 hours (running 10W devices).

Can a completely dead deep cycle battery be recharged? ›

Deep cycle batteries are unique power sources for marine applications. They're designed to be discharged down to practically no power at all, and then you can charge them back up to a brand-new state.

Can a deep cycle battery be fully discharged? ›

BATTERY TIP 4 - Never fully discharge a deep cycle lead acid battery! The deeper you discharge the battery the more it will reduce the battery's total cycle life. We recommend discharging a battery to no lower than 50% DOD, with a maximum of 80%.

How many 200Ah lithium battery can power a home? ›

Total number of batteries

Divide the total energy of the battery (Assuming you're using a 200Ah battery for your design. It could 150AH) by the Battery Voltage x Capacity. Approximately, that will be 2 batteries. Therefore, you will need two, 12V 200Ah batteries to power your load for 7 hours.

How long can a deep cycle battery power a fridge? ›

How long will a 12 volt battery run a 12V refrigerator. If you're using a Lead Acid battery, you can only discharge to about 50% without causing damage and shortening battery life, so with Lead Acid batteries, you'll get about half that run time, or 12 to 25 hours.

What batteries are used for solar? ›

There are two major types of batteries that can be used to store energy from the sun namely: Lead-Acid and Lithium-Ion batteries.

Is Lithium Battery better for solar? ›

Yes, lithium solar batteries outperform the competition when it comes to storing energy for a solar system. They're more efficient, charge faster, require no maintenance, and last substantially longer. The efficiency comes from the very low internal resistance that allows the batteries to charge with minimal loss.

What are the types of battery which type of battery are used in solar? ›

Solar Battery Types

The four main types of batteries used in the world of solar power are lead-acid, lithium ion, nickel cadmium and flow batteries.

Can I use a marine battery for solar? ›

If you're looking to add solar to your boat, it's important to purchase the right battery for your system. While you may be tempted to just purchase a marine battery and assume you're safe, many marine batteries, in reality, aren't suitable for solar installations.

What are the best solar batteries for cold weather? ›

LiFePO4 or LFP batteries are suitable for almost all conditions(temperatures ranging from -4°F to 140°F(-20C to 60C)). Lithium batteries are an excellent alternative for continuous, dependable power for off-grid solar, RV, and Camper Van owners who live or travel in extremely cold climates.

What is the biggest disadvantage of a lithium-ion battery? ›

Despite its overall advantages, lithium-ion has its drawbacks. It is fragile and requires a protection circuit to maintain safe operation. Built into each pack, the protection circuit limits the peak voltage of each cell during charge and prevents the cell voltage from dropping too low on discharge.

Which battery is more powerful than lithium-ion? ›

Sodium-ion batteries are an emerging technology with promising cost, safety, sustainability and performance advantages over commercialised lithium-ion batteries.

Should I get AGM or lithium? ›

Which Battery to Choose? As is quite evident, Lithium-ion batteries are considerably better than AGM gel flooded batteries in every key aspect. While the initial cost of buying a battery can be high in the case of lithium batteries, they make up for it by their considerably longer lifespan and greater capacity.

What type of battery is Tesla using? ›

LFP: Lithium-iron-phosphate, aka “the new guy”

Tesla announced in fall 2021 that they would be switching to LFP batteries in all standard range Model 3 and Model Ys. By Q1 of 2022, half of the vehicles delivered worldwide were equipped with these new batteries.

What can damage solar battery? ›

Heat is the enemy of batteries,” Rowe said. “While a battery in warmer temperatures can produce more energy in the short term, the degradation of the internal components is accelerated.” It is important to note that even short periods at high temperatures can have an impact on battery life, McDowall added.

What is the cheapest battery type with solar? ›

Nickel-Cadmium (NiCd)

NiCd has the lowest cost per cycle in comparison to the 3 other types of battery presented.


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