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Is solar battery storage worth the cost?

Solar batteries are becoming more popular, but how much does one cost and are they worth it? Learn more about solar batteries in Australia, solar battery storage costs, and the benefits of installing one.
Fact Checked

Updated: 13 May 2024

This article is aimed at helping solar power users understand the ins and outs of solar batteries for home purposes. We underline the solar battery storage costs, how long a solar panel storage battery lasts, and why new solar batteries are worth it.

Key facts

What solar battery systems are available in Australia?

How much solar battery storage do I need?

While it depends on how much power you produce and need to save, there is a typical rule of thumb for each size. A ‘large’ solar battery system has a usable energy storage capacity of 13.5 kWh. A ‘medium’ solar battery system has a usable energy storage capacity of 6.5 kWh. Finally, a ‘small’ solar battery system has a usable storage capacity of 3.5 kWh.

The lifespan of battery storage systems

The lifespan of a solar battery is usually around ten years, but it all depends on how you use your device. If temperatures remain normal and there are no extreme changes in weather conditions for this period, then most likely, the batteries will last longer than their warranty does, which means owners can enjoy savings by not having to buy new ones as often. However, most recent generations have only been around since a few years ago, so this may change with time as more research gets done.

Should I invest in a battery storage system?

Batteries may not always make economic sense for most homes yet. They’re still relatively expensive, and the payback time will often be longer than ten years (typically) of warranty on your battery. The cost of solar panels has been dropping over the last few years, but there’s still a while before they become affordable enough for most people with many rebate programs available throughout the country.
In two or three decades from now, though, it may make good economic sense because batteries will likely improve in price as well. Batteries can be an economical choice for some homeowners. Ultra-low-cost, high power consuming homes that are savvy about using their solar-generated and stored energy may make the battery pay off in less than ten years. Many people see batteries not just through economic lenses but also because they want to live as independent from utility companies as possible – which is why we’re seeing such rapid growth of residential storage today.

Benefits of installing a battery system

The importance of battery storage for solar panels cannot be overstated. With a battery, the energy that your plant generates but doesn’t use at its time can get stored, so you don’t have to rely on power from an external source. Most on-the-grid energy and electricity is generated through coal plants and other fossil fuels. Storing your energy provides you with the ability to use the most environmentally friendly energy available.

Although the cost of your system may vary, you can reduce your electric bill by storing excess solar energy because when there’s more than enough sun shining down on us to power our homes and businesses through batteries.

Frequently Asked Questions and Answers

Theoretically, a solar battery should last as long and retain its charge. However, there is always energy lost in any transfer, which means that even when stored electronically or mechanically, the release will occur after some time has passed since being charged up initially. A standard cell typically lasts for 1-5 days, but this can vary depending on temperature changes outside.

The most important thing to consider when storing your batteries is the temperature. Keep them cool and dry, with a good amount of insulation around it, so that they can maintain their charge without getting too hot or losing power quickly from neglectful caretakers who don’t take time out for themselves.

The total energy output within the warranty is limited to 27.4 MWh, but batteries can last anywhere between five and 15 years with proper maintenance! That means you’ll likely need a replacement during your system’s 20-30 year life span – not bad for an investment that pays off many times over in lower monthly bills at no cost or reduced rate electricity costs through solar power systems.

When you use a battery, it loses its charge over time. By estimating when your batteries will expire and keeping them stored appropriately while not using their power for long periods (this includes turning off electronics), they can last five or six years before needing replacement. The shelf life depends on what type we’re talking about here – AA-size alkaline lasts ten full Years without charging; Ni-MH cells have three active year spans but need recharging at least once per month to keep things running smoothly.

Keep the number of batteries in your bank at once because each connection can cause uneven charging. If you have 16 or fewer battery connections, it’s best for efficiency. If you have a large bank of batteries, rotate the batteries within the bank periodically. Using large battery interconnect cables reduces resistance and allows for even charging. Use only distilled water.



Megan has extensive experience writing about health and life insurance in Australia. Megan has a special interest in health and wellness. She relies on her background in counselling psychology to convey the latest findings in a manner that is most beneficial to ComparingExperts readers. In every article she writes, Megan aims to uphold the standards of the Private Health Insurance Intermediaries Association (PHIAA) which ComparingExpert is part of.

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