Solar Batteries

You can buy Solar Batteries for your Solar Power System, a fundamental part of any Off-Grid or Hybrid solar system that requires backup power. Solar Batteries can store electricity for immediate use in the home or business.

The Main Solar Battery Types


The oldest option available the Lead-Acid battery has been in solar system for many years, there are variations under the Lead-Acid family.

AGM (Absorbent Glass Mat) is the latest Lead-Acid technology available, they are better than the traditional Flood Lead-Acid option.

They are maintenance free,  they don’t leak acid or fumes because they are completely sealed  making them very stable.

The low discharge rate means they lose less power, ideal for regular or semi-regular use.

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A far more efficient battery the Lithium-ion technology is cleaner, lasts longer and wastes less compared to Lead-Acid Batteries.

Completely maintenance free and with a greater DOD (Depth Of Discharge) you will get  up to 80%  compared to Lead-Acid which is 50%.

 Their lifespan is around 10 – 12 years with around 5000 – 7000 cycles , this makes Lithium-ion a better investment long term.

We highly recommend Lithium-ion, the Fusion range is great value.

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Deep Cycle Solar Batteries

Solar Batteries are a key component when looking to go Off-Grid. They will help power your home during periods where there is no solar available.

Not sure where to start, let’s begin with the basics.

Deep Cycle Solar Batteries

What does this mean, deep-cycle batteries are different to your normal batteries you have in your household devices. These batteries discharge power slowly, this is ideal for the household due to the large appliances it needs to run.

Depth-Of-Discharge (DOD), in the early days there was only one type of battery available, AGM or Lead-Acid. These were essentially car batteries re-purposed and used in off-grid solar systems.

The Lead-Acid battery had a limit however, this was the amount of DC electricity you could discharge from it, the Depth-Of-Discharge (DOD) was 50% of the total battery capacity.

The issue was and still is with Lead-Acid is that if you go beyond that limit it would severely diminish the lifespan of the battery.

For this reason you needed other components like the Charge Controller, these are now typically integrated into the modern inverters of today.

Types of Solar Batteries

As mentioned above there are 2 main types that are sold on the market today, this is AGM (Lead-Acid) and Lithium-ion.

Lithium-ion now being the most popular due to it’s advantages over Lead-Acid, these include:

  • Longer lifespan
  • Deeper Depth-Of-Discharge
  • Integrated BMS (Battery Management System)
  • Faster & Larger Discharge Limit
  • Smaller & Compact size
  • Rack-Mounted & Wall-Mounted options
  • Aesthetically better

So as you can see there are far more benefits to Lithium-ion, however, they are more expensive. But in the long term they are cheaper due to their longer lifespan.

Adding Batteries to your Solar System

There are various approaches we recommend to adding solar batteries to your system.


Many Lithium-ion batteries come with a BMS, this communicates with your inverter to optimise the use of the battery. It monitors closely how much capacity it left, what the rate of charge and discharge is and things like voltage.

Make sure that your inverter has “Comms” or Communication with your chosen battery, however, this isn’t a make or break as you can set your inverter to “User-Defined” mode, this is available on almost all new Off-Grid and Hybrid inverters.

Battery Capacity

Another important factor is the size of the battery, too small and you’ll be running out very quickly, too big and you’ll waste money.

Finding the sweet spot is relatively easy, you simply add the appliances (watts or kilowatts) that you need to run during the evening, overnight and morning. Simply add these together with the number of hours they will be running for to get an idea.

You don’t need to be spot on, life changes and so will your need. We recommend a battery that you can scale over time. All of our batteries can be extended, choose a rack-mounted or wall-mounted battery and simply buy another until you aren’t using grid power.

Connecting your batteries to your system is easy enough, we always recommend getting an solar installer to assist, they will also set the inverter so things run smoothly.

Quality Vs Affordable Solar Batteries

As the saying goes “cheap can be expensive”, you can get AGM batteries, but the lifespan is around 4 years. You can also get cheap second-life lithium-ion batteries too which are used batteries, these also have half the lifespan of new ones.

We always source the best quality at the best price possible, we’ve been through all the cheap variations and our advice is to invest in your battery bank. The lifespan will be over 10 years and you won’t have to keep going through the expense and hassle of replacing.

Quality Range of Brands

Investing in a quality brand solar battery also means getting a warranty for 10 years. This shows the company has confidence in the products they put on the market, and solar storage solutions are not excluded from the rule. At SolarAdvice, we only source batteries from industry leaders such as:

– Fusion

Fusion is an innovative and affordable lithium-ion battery brand.

With every new model that gets released, the batteries get smarter and more efficient. Plus, the sleek designs make the batteries presentable in any room, a strong alternative to the Telsa Powerwall.

– PylonTech

Pylon Tech batteries enjoy a reputation for out-selling the rest. The company was established in 2009 and continues to develop better technology for increased storage options. Also, considered one of the most stable and efficient battery brands on the market, we are happy to make them available directly to our clients at the most competitive price on the market.

– Dyness

Dyness is a relatively new kid on the block, their Owner was once the Chief Engineer at PylonTech and so the Dyness shares a lot of similarities of that of the PylonTech stackable batteries. With a 10-year warranty, fantastic performance and features the Dyness range is very competitive.

– BlueNova

Even though Blue Nova is relatively new to the market (established 2015), it does not mean the company lacks the ability to set quality standards. After partnering with Reutech, BlueNova has been made available in South African markets. You can look at our range of BlueNova batteries right here.

In Conclusion

Whatever your requirement we are here to help, take advantage of that. We want you to walk away with something long-lasting and something you will be very happy with, chat to us!

Learn more about Solar Batteries by reading our full guide here.