konibar
2021-08-17 14:31:02
- #1
3500kwh is already consumed by your air-to-water heat pump, depending on the size of the house.
Electric heating (even indirectly via heat pump) is the most unfavorable scenario imaginable.
Especially since you always need to heat more when it is dark outside.
The efficiency of good commercially available solar panels is currently about 25% max
(monocrystalline, better panels are in the lab stage).
But only with optimal orientation in summer and always free of dirt.
For solar heating, solar thermal (parallel to photovoltaics) would be much more efficient.
And possibly a 500-liter hot water tank for this purpose.