this post was submitted on 30 Jun 2025
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[โ€“] unexposedhazard@discuss.tchncs.de 5 points 12 hours ago* (last edited 12 hours ago) (1 children)

Yes, its kinda complicated and there are lots of reasons. The solar advocacy groups fought a lot to make it so that you dont even have to ask/notify your landlord or energy provider for these <800W installations

  • Feeding in a lot of power (and especially quickly switching it on and off) can create grid instability (because the electricity grid is stupid and designed for large centralized powerplants)
  • At some point (really big commercial installations) you are even required to install a remote disconnect system that the provider can use to turn off your installation if the grid is overloaded
  • You dont get the same amount of money for selling energy then buying it, which means with high power installations the provider loses money if they dont install a smart meter (meter that keeps track of how much flows out and into the grid)
  • With <800W installations the provider can still install a smart meter if they want, but you dont have to notify them of your installation

I hope i didnt mix something up here. Obviously read about your local laws if you install anything.

[โ€“] MouldyCat@feddit.uk 1 points 7 hours ago

That's neat. Someone told me about inverters you could just plug into a wall socket and have it feed appliances in the house here in Spain, but I just thought they were crazy.

In Germany, can you use the solar panels to directly feed the grow-lamps for a couple of healthy cannabis plants? Is that also permitted?