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I think the title is right in spirit. The law forbids you to use power from your own solar panels if the grid is offline. This is a nonsense requirement. Also

by sddfd 9y ago

I think the title is right in spirit. The law forbids you to use power from your own solar panels if the grid is offline. This is a nonsense requirement. Also the law requires you to use the same inhouse wiring as the grid for power from the solar panels. Why should anyone care about how you wire your own home, as long as your interface with the outside world is according to spec?

jimktrains2 9y ago
The future buyer of your home would like to ensure the safety and correctness of the wiring. The future buyer also needs to know what the limits of the system are, so that they don't accidentally overload it, and if it is overloaded that it performs appropriately (i.e. stop instead of catching fire). A future buyer may, thinking the house is to code, attempt to connect the house to the grid. If it is not wired appropriately that can also cause risks to the occupants. Future contractors also need to know the set up of the system. Being done differently could possibly very real safety risks. Neighbors would like to ensure that your house does not catch fire, risking their houses.
- JshWright 9y ago
  Firefighters would like to ensure that your house does not catch fire, risking their lives.
- sddfd 9y ago
  The requirement to use the same wiring precludes the home owner from having an additional low-volate wiring in the house. Most modern devices use low voltage nowadays, check what any of the power supply units for your laptop, phone, etc output to the device. Low-volate is less dangerous, and international regulations (IEC 60449) reflect that. I'm not an expert, but it is likely that besides the law discussed here, such wiring would be legal even without approval. It definitely is in Germany, and to say the least, we like regulations.
  - jimktrains2 9y ago
    I'd be surprised if it precluded the use of low voltage wiring because there are standards for it as well. The issue is that the law ends up with houses needing the 120VAC connection to the grid. I don't think that doesn't mean there can't be a secondary low voltage line, but ianal.
IshKebab 9y ago
It doesn't sound like nonsense to me. It could definitely be dangerous to feed high voltages back into the powered-down grid. And your home isn't your home forever. One day you will die and someone will inherit your shoddy home grid system. Electrical wiring regulations exist for a reason.
- sddfd 9y ago
  > It could definitely be dangerous to feed high voltages back into the powered-down grid. I said as long as the interface is according to spec. There are effective mechanisms to prevent this kind of feedback. > shoddy home grid system Then have an electrical engineer review and approve it. Still no reason to forbid it.

by sddfd 9y ago

jimktrains2 9y ago

The future buyer of your home would like to ensure the safety and correctness of the wiring. The future buyer also needs to know what the limits of the system are, so that they don't accidentally overload it, and if it is overloaded that it performs appropriately (i.e. stop instead of catching fire). A future buyer may, thinking the house is to code, attempt to connect the house to the grid. If it is not wired appropriately that can also cause risks to the occupants. Future contractors also need to know the set up of the system. Being done differently could possibly very real safety risks. Neighbors would like to ensure that your house does not catch fire, risking their houses.

JshWright 9y ago
Firefighters would like to ensure that your house does not catch fire, risking their lives.
sddfd 9y ago
The requirement to use the same wiring precludes the home owner from having an additional low-volate wiring in the house. Most modern devices use low voltage nowadays, check what any of the power supply units for your laptop, phone, etc output to the device. Low-volate is less dangerous, and international regulations (IEC 60449) reflect that. I'm not an expert, but it is likely that besides the law discussed here, such wiring would be legal even without approval. It definitely is in Germany, and to say the least, we like regulations.
- jimktrains2 9y ago
  I'd be surprised if it precluded the use of low voltage wiring because there are standards for it as well. The issue is that the law ends up with houses needing the 120VAC connection to the grid. I don't think that doesn't mean there can't be a secondary low voltage line, but ianal.

IshKebab 9y ago

It doesn't sound like nonsense to me. It could definitely be dangerous to feed high voltages back into the powered-down grid. And your home isn't your home forever. One day you will die and someone will inherit your shoddy home grid system. Electrical wiring regulations exist for a reason.

sddfd 9y ago
> It could definitely be dangerous to feed high voltages back into the powered-down grid. I said as long as the interface is according to spec. There are effective mechanisms to prevent this kind of feedback. > shoddy home grid system Then have an electrical engineer review and approve it. Still no reason to forbid it.