Key takeaways
- Hardware costs are down ~30% in three years.
- Lower feed-in tariffs make self-consumption more valuable.
- Retrofitting later usually costs more than adding from day one.
Five years ago, batteries had a payback of well over a decade. In 2026, with lower hardware costs and lower feed-in tariffs, the maths has shifted significantly.
For a household exporting a lot during the day, a 10–13 kWh battery typically pays back in 7–9 years and provides blackout protection on top.
Pairing your install with a battery from day one usually costs less than retrofitting later.
