I have put a reservation in for Tesla solar roof to go on a remote building that is about 200 feet away from my main panel and existing powerwalls and other solar inverters. That circuit is currently fed by a 50 amp breaker and has almost no load on it. It's in a barn with a few non used power plugs and occasionally used lighting.
I am certain that the circuit will hold whatever PV output I am planning so that is not an issue. I also expect that they will have to put disconnects at the new inverter at the remote building but also at the main panel for safety protection. I think that is doable but may need to convince the building department that is OK. There already exists a separate 240V panel in that building so no problem with isolated circuits etc. It's the home run back to the main panel that is an issue.
But my real concern is how Tesla will be able to monitor the solar output to the PWs. It would be one thing if the circuit had no load on it at all. But there will be times, especially when there is no solar production and the lights are used, that their will be a load on that circuit. Hence Tesla would see a negative load. Not sure how that would work. Personally I would not care since it would be minimal and occasional, but it might be an issue for them.
The alternative would be to put loop inductors at the remote building on the solar panel circuit and then wire those back to the main panel. Since that load is so small I think I MIGHT be able to fish a couple of small wires into the existing conduit. Not sure what voltage those are though so if they are not at least 120v I know the building department will not allow that.
Has anyone else put solar in a remote building back to PWs as I have described above?
I am certain that the circuit will hold whatever PV output I am planning so that is not an issue. I also expect that they will have to put disconnects at the new inverter at the remote building but also at the main panel for safety protection. I think that is doable but may need to convince the building department that is OK. There already exists a separate 240V panel in that building so no problem with isolated circuits etc. It's the home run back to the main panel that is an issue.
But my real concern is how Tesla will be able to monitor the solar output to the PWs. It would be one thing if the circuit had no load on it at all. But there will be times, especially when there is no solar production and the lights are used, that their will be a load on that circuit. Hence Tesla would see a negative load. Not sure how that would work. Personally I would not care since it would be minimal and occasional, but it might be an issue for them.
The alternative would be to put loop inductors at the remote building on the solar panel circuit and then wire those back to the main panel. Since that load is so small I think I MIGHT be able to fish a couple of small wires into the existing conduit. Not sure what voltage those are though so if they are not at least 120v I know the building department will not allow that.
Has anyone else put solar in a remote building back to PWs as I have described above?