We installed roof solar (10kW panels + 8kW hybrid inverter + 32kWh battery + planning/execution) last October for 11k euro. After all the math, our "investment" would pay off in approx 8-10 years (at current electricity prices). That's without an electric car, which we plan to buy sometime in the next two years. All in all, pretty happy. Especially that we have frequent grid faults. Even my ISP has some beefy batteri…
Nice. In the US, it cost us $35k to install 7.6 kW panels + 13 kWh battery. But our PG&E electricity prices in the Bay Area are also several times more expensive than in Europe ($0.50 per kWh) so it will also pay off in 8-10 years.
We also did the math for ourselves with 8-10 years at current electricity prices: 30 eurocents/kWh (which got 3x more expensive in the last 10 years). So we might be lucky and break even even sooner.