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tim 
tim
Shit you forget: WIth 2.000kWh/year of power usage (a lot for a single household) you'd need ca 2kW of peak PV, 3kWh of battery storage to reach 63% self-sufficiency. Double it: 80%
2kW peak PV is easily below 2.000€, including an inverter. The batteries are roughly 1.5k€ - this could be easily combined into a hybrid system, add some current monitoring to not feed in, ever (it's not a lot of left-over energy anyway, so can also dump it / signal to the resident it's time to run the dishwasher and stuff).
With my current provider 2.000kWh is 1400€/year. 740kWh (the estimated usage with such a system) would be 608€ -> saving 800€/year. Even with expensive install and mounting hardware, let's say 5k€ for the whole system, it pays back in a little more than 6 years. The panels make it to 25 years easily, the battery is rated for 6.000 cycles with 80% capacity remaining, so also no worries. This is literally the license to print money - if you have the place to install it.
2kW peak PV is easily below 2.000€, including an inverter. The batteries are roughly 1.5k€ - this could be easily combined into a hybrid system, add some current monitoring to not feed in, ever (it's not a lot of left-over energy anyway, so can also dump it / signal to the resident it's time to run the dishwasher and stuff).
With my current provider 2.000kWh is 1400€/year. 740kWh (the estimated usage with such a system) would be 608€ -> saving 800€/year. Even with expensive install and mounting hardware, let's say 5k€ for the whole system, it pays back in a little more than 6 years. The panels make it to 25 years easily, the battery is rated for 6.000 cycles with 80% capacity remaining, so also no worries. This is literally the license to print money - if you have the place to install it.
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