Want to know the ins and outs of home solar battery storage? Keep reading to find out.

Solar batteries defined

A solar battery is a storage unit that stores energy generated by rooftop solar panels. Solar batteries allow homeowners to store their excess energy rather than send it to the grid.

The benefit of solar batteries

When solar panels produce energy and homeowners don’t use it straight away, it’s exported to the grid, where the homeowner receives a feed-in tariff, shown as credit on their energy bill.

Most South Australians aren’t home during the day; therefore, their solar energy is exported to the grid. Then, at night, homeowners need to purchase energy back from the grid to power their home at a higher price.

This is where solar batteries come in. Homeowners who aren’t home during the day, can use a solar battery to store their solar energy. That way, they can comfortably consume energy at night, reducing their dependence on the grid.

Because solar batteries allow homeowners to use power generated from their own system rather than depending on the grid, it leads to lowered energy bills, and ultimately, increased savings.

Solar battery sizing

Solar batteries come in varying sizes and brands, it is always recommended to discuss your options with a reputable solar company before purchasing. A good solar company can analyse your energy bills to determine your average energy consumption and solar export, to suggest the right solar battery for your personal energy requirements.

Solar battery terms

Depth of Discharge

It’s damaging for a solar battery to completely discharge. Solar batteries always require a small charge in them, to prevent them from fully discharging. The ‘depth of discharge’ refers to the percent of energy that can safely discharge without damaging the battery, for example, 90 percent.

Kilowatt (kW)

A kilowatt is a measure of power. 1 kW = 1000 watts. We use kW to define the size of a solar system and its peak power efficiency. For example, a 3kW system could produce 3kW of power on a sunny day. 

Kilowatt hours (kWh)

A Kilowatt hour is a unit of energy that measures how much electricity your home has used. For example, if your system outputs 3kW of power continuously for an hour you would have made 3kWh of energy. The average television uses 1kW of power per hour = 1kWh. 


The discharge and recharge of a solar battery is known as a cycle. It can be used to measure the lifespan of a solar battery.

Charge/discharge rate

The rate a solar battery can charge and discharge. The higher the charge rate, the faster it can recharge.

Solar battery incentives

The South Australian Government provides a subsidy of up to $6,000 towards the cost of installing a solar battery. The subsidy amount is taken off the upfront cost, saving homeowners money. The South Australian Government has announced the subsidy is reducing to $4,000 on April 15, 2020. If you are looking to purchase a solar battery, now would be the best time before the subsidy decreases.

Finding a good deal on a solar battery

The right solar battery capacity will help you get a return on your investment sooner. It’s important to carefully choose a solar company who can professionally recommend the right solar battery for your personal energy requirements.

We have a range of solar battery packages available, to suit our diverse customers. If you would like a solar battery package tailored to your needs, call now for a free consultation on 1300 70 71 72.