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What are the expected payback periods for solar-only systems versus solar-plus-battery systems by region, based on the latest data available?

Answered Question 7144 (2026)
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Asked by

Megan Woods

Member for Wigram · Labour Party

Question

  • What are the expected payback periods for solar-only systems versus solar-plus-battery systems by region, based on the latest data available?

Answered by

Hon Simon Watts

Member for North Shore · National Party · Minister for Energy

Answer

EECA estimates payback period for solar systems can be from 7-12 years for the average household. As batteries are still relatively expensive, they can increase the payback period. This can vary by region based on factors such as sunshine hours and electricity usage.