Australian households and businesses are installing solar and batteries in record numbers, with more than 500,000 tapping into the government’s Cheaper Home Batteries Program.
But even with a generous discount, batteries can be expensive to buy upfront.
Compare the Market crunched the numbers and found that while batteries can give households more control over when they use their power and what they save off their energy bill, they don’t necessarily put more money back in the monthly budget while the system is being paid off.
But despite batteries delivering additional value to a growing number of households over time, it’s solar that remains the champion of savings to household’s hip pocket when taking into account the cost and benefit.
Under the modelled assumptions, even a household financing a 13kW solar system with no battery could be around $41 a month better off from day one, because the estimated energy savings outweigh the monthly repayments. On an upfront-cost basis, the system would take around 4.1 years to pay for itself.
On the other hand, someone who installs solar and a 10kWh battery would pay $57 more a month under the financed model, while taking 5.8 years to see a payback on the investment.
The figures suggest batteries should be viewed as a long-game strategy, rather than a quick fix for bigger energy bills.
Solar pay-off schedule
|
Scenario |
Investment |
Annual Energy Cost Reduction |
Payback Period |
Monthly Household Budget Impact (Financed) |
|
Solar Only
(13kW) |
$12,500 |
$3,016 |
4.1 years |
+$41/month |
|
Solar + 10kWh
Battery |
$20,900 |
$3,574 |
5.8 years |
-$57/month |
|
Solar + 13kWh
Battery |
$23,000 |
$3,628 |
6.3 years |
-$88/month |