Australian Home Battery & Solar Statistics 2026

Home battery size statistics

Battery capacity as designed for the household, in nominal kWh. Sunnn designs for wholesale electricity plans, where a bigger battery has more to trade, so these sizes sit above a typical self-consumption battery.

34.8 kWh

The 2026 Sunnn Battery Index found the median home battery designed was 34.8 kWh, based on 462 Australian household designs.

98%

The 2026 Sunnn Battery Index found 98% of home battery designs were 20 kWh or larger (452 of 462 households).

59%

The 2026 Sunnn Battery Index found 59% of home battery designs were 30 kWh or larger (271 of 462 households).

39%

The 2026 Sunnn Battery Index found 39% of home battery designs were 40 kWh or larger (179 of 462 households).

Solar export and feed-in tariff statistics

Read from the electricity bills households uploaded. Feed-in tariffs carry no GST.

67%

The 2026 Sunnn Battery Index found 67% of households asking for a battery design already had solar exporting to the grid (281 of 417 bills).

4c per kWh

The 2026 Sunnn Battery Index found the median feed-in tariff paid to solar households was 4 cents per kWh, based on 282 electricity bills.

71%

The 2026 Sunnn Battery Index found 71% of solar households were paid 5 cents per kWh or less for their exports (199 of 282 bills).

38%

The 2026 Sunnn Battery Index found 38% of solar households were paid 3 cents per kWh or less for their exports (108 of 282 bills).

11.8 kWh a day

The 2026 Sunnn Battery Index found the median solar household exported 11.8 kWh a day to the grid, based on 281 electricity bills.

41%

The 2026 Sunnn Battery Index found 41% of solar households exported more electricity than they bought from the grid (114 of 281 bills).

Household electricity bill statistics

Bill totals as billed, for the billing period on the uploaded bill, converted to a daily figure.

$6.44 a day

The 2026 Sunnn Battery Index found the median household electricity bill was $6.44 a day, about $2,350 a year, based on 407 bills.

18.1 kWh a day

The 2026 Sunnn Battery Index found the median household bought 18.1 kWh a day from the grid, based on 417 electricity bills.

Solar and battery design statistics

65%

The 2026 Sunnn Battery Index found 65% of home battery designs also added new solar panels (301 of 462 households).

8.55 kW

The 2026 Sunnn Battery Index found the median new solar array designed alongside a battery was 8.55 kW, based on 301 household designs.

43% NSW and ACT

The 2026 Sunnn Battery Index sample is 43% New South Wales and ACT, 27% Queensland, 20% Victoria and 8% South Australia, by postcode, across 464 households.

Government and regulator statistics

Figures from other publishers, each credited to whoever did the original work.

• Since 1 May 2026 the federal Cheaper Home Batteries Program pays the full rebate rate on the first 14 kWh of usable battery capacity, 60% on the next 14 kWh and 15% on the next 22 kWh. Clean Energy Regulator, March 2026
• The New South Wales solar feed-in tariff benchmark for 2026-27 is 3.4 to 6.5 cents per kWh. IPART, 2026-27 benchmark
• The regulated solar feed-in tariff in regional Queensland for 2026-27 is about 6 cents per kWh. Queensland Competition Authority, 2026-27 fact sheet
• Victoria no longer sets a minimum solar feed-in tariff. Essential Services Commission (Victoria)

Method and limits

• Sample. 464 residential households that asked Sunnn for a solar or battery design from 20 May to 10 November 2026. One design per household (the latest saved). Business and commercial designs are excluded.
• Bills. 432 of those households uploaded an electricity bill. Bill figures come from the billing period on that bill. Each line states how many bills it rests on.
• Not a national sample. These are households already interested in solar or a battery, mostly in New South Wales, Queensland, Victoria and South Australia. Read the figures as a picture of that group, not of every Australian home.
• Designs, not installs. Battery and solar sizes are what was designed for the household, in nominal kWh and kW. A design is not a sale or an installation.
• Privacy. Only aggregates are published. No name, address, meter or bill is shown.

Questions

How to cite

Sunnn, 2026 Sunnn Battery Index, sunnn.co/statistics, updated 10 November 2026. For background on the numbers, see our guides to solar feed-in tariffs in 2026, how big a home battery you need and the 2026 home battery rebate.