Home battery payback times: they are a’changin’ thanks to the upcoming government rebate. Simple payback is a common method in determining if installing a solar battery is worth it for you.
Home battery simple payback (how long it takes for electricity bill savings/credits to total the installed cost) within a system’s warranty period could only be achieved under certain circumstances to this point. The federal government battery rebate — officially known as the Cheaper Home Batteries Program — will be a game-changer in most scenarios, particularly in SA.
Our estimate on annual savings and simple payback for a 10 kilowatt-hour (kWh) battery in SA at Australia installed cost of $8,500 that takes into account the federal rebate only. This is also based on having a solar power system of more than 6.6 kilowatts (6.6 kW) and overnight electricity consumption of 6.6 kWh, which is what approximately 60% of Australian households consume between sunset and sunrise.
Note that these figures were also based on May 2025 electricity prices, and from July 1 this year electricity prices will increase for most Australians, improving battery payback times.
Annual Savings $1,350 | Simple Payback Period 6.3 years
Things are looking pretty good in Adelaide achieving simple payback just with the federal rebate in well under 10 years, which is usually the warranty period of a solar battery system these days.
Simply put home batteries will easily provide a sub-10-year payback with typical overnight consumption in the South Australia.
The scenario in SA is a simple yes. What about payback times in situations such as:
How do these aspects impact simple payback? All this is covered by one of our highly skilled technicians assessing your home.
If you’re wondering about costs of popular market leading solar batteries from these brands, here’s a rough price guide using the
Tesla Powerwall 3 as a benchmark for capacity. But note these prices are before the rebate do not include installation.
Among the other handy tools En3rgy Solutions offers is our Genie, which uses your home data to accurately calculate savings and payback, to quickly see estimated savings and payback when you combine a battery with solar power. Genie now factors in the federal rebate.
