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What do you do with that much electricity? Was it necessary to over-dimension for winter?

by pingou 1y ago

yvan 1y ago
If you have an EV that can be charged only at night, a big battery is required.
- cyri 1y ago
  For solar excess charging I use evcc.io When I charge the car via battery then only down to ~75% for now. The remaining energy is needed by the house during winter months.
raphael_l 1y ago
I would also be interested in the reasoning here! Just for comparisons sake, our 8.6kwP setup with a 10kwH battery cost us (after subsidies from governemnt) appr. ~€11.5k. Haven't received all the subsidies yet, so the total will be lower by about 1.5k (I think). Everything was done through installers, we didn't lift a finger (also couldn't, because when it comes to electricity I have as much experience as the dog next door). If I had more due diligence before I would have scaled up the panels up to at least 10kwP, for future proofing probably to 12kwP. This is mostly just to make sure winter is covered better, as our production is really low as we have a 10° flat roof installation.
cyri 1y ago
Of course it is a bit oversized. We’re living in a big river valley where we have fog from October until March. On some days in November the fog is so dense that the whole system does not produce any kind of energy. On the other days the produced kWh are enough to charge the battery. We have a heat pump (extrem efficient), servers, one electric car, etc which consumes all together around 13MWh per year. The solar system produces around 27.5MWh. Most of the energy gets fed back into the grid. We’re currently investigating to connect the neighbour houses physically to us. But that takes even more time here :-(
- amenghra 1y ago
  FYI: Neighborhood-level connections are changing starting next January (look up RCP and CEL).
  - butshouldyou 1y ago
    They're in Switzerland.
    - amenghra 1y ago
      Yes, how neighborhood-level connections are setup in Switzerland is changing next year. See eg https://www.swissolar.ch/fr/connaissances/nouvelle-loi-sur-l-electricite https://www.swissolar.ch/fr/connaissances/nouvelle-loi-sur-l... (post written in French)

What do you do with that much electricity? Was it necessary to over-dimension for winter?

by pingou 1y ago

What do you do with that much electricity? Was it necessary to over-dimension for winter?

yvan 1y ago

If you have an EV that can be charged only at night, a big battery is required.

cyri 1y ago
For solar excess charging I use evcc.io When I charge the car via battery then only down to ~75% for now. The remaining energy is needed by the house during winter months.

raphael_l 1y ago

I would also be interested in the reasoning here! Just for comparisons sake, our 8.6kwP setup with a 10kwH battery cost us (after subsidies from governemnt) appr. ~€11.5k. Haven't received all the subsidies yet, so the total will be lower by about 1.5k (I think). Everything was done through installers, we didn't lift a finger (also couldn't, because when it comes to electricity I have as much experience as the dog next door). If I had more due diligence before I would have scaled up the panels up to at least 10kwP, for future proofing probably to 12kwP. This is mostly just to make sure winter is covered better, as our production is really low as we have a 10° flat roof installation.

cyri 1y ago

Of course it is a bit oversized. We’re living in a big river valley where we have fog from October until March. On some days in November the fog is so dense that the whole system does not produce any kind of energy. On the other days the produced kWh are enough to charge the battery. We have a heat pump (extrem efficient), servers, one electric car, etc which consumes all together around 13MWh per year. The solar system produces around 27.5MWh. Most of the energy gets fed back into the grid. We’re currently investigating to connect the neighbour houses physically to us. But that takes even more time here :-(

amenghra 1y ago
FYI: Neighborhood-level connections are changing starting next January (look up RCP and CEL).
- butshouldyou 1y ago
  They're in Switzerland.
  - amenghra 1y ago
    Yes, how neighborhood-level connections are setup in Switzerland is changing next year. See eg https://www.swissolar.ch/fr/connaissances/nouvelle-loi-sur-l-electricite https://www.swissolar.ch/fr/connaissances/nouvelle-loi-sur-l... (post written in French)