Unless you're sure that your donations on will be used on-premise immediately, then you will actually cost whoever is your host. (It may even have to be on the

Unless you're sure that your donations on will be used on-premise immediately, then you will actually cost whoever is your host. (It may even have to be on the same 120V phase tap from the 240V coming off the street transformer, but I'm not sure.) Standard electric meters are not sensitive to power direction - power going into the residence or power going out. They only detect volume of power movement, but not direction. When you buy a grid-tie system, the power company has to come out and swap your power meter so that the new one will essentially run backwards if you happen to have net power going back into the grid. Anyways, fully solar systems are harder at our latitudes than if you live in California or closer to the equator without the strong winter demands. Maybe just fail-over to propane as needed. Power inverters need to be manufactured grid-tie style. They have a phase lock loop ( IIRC ) that ties into the phase of the grid and they need to not generate power if power is down on the grid in grid-mode, otherwise guys working on the lines can be electrocuted when they think they have turned off power lines. Also, if you're donating back, you need to be concerned about amperage on that circuit and it needs to be dedicated, in addition to following all your local power code. If you just so happen to generate 14Amps net and then a device on that same circuit consumes 28A, then the panel 15A breaker may not trip, but parts of your circuit have 28 Amps flowing: Load (28A) ^ <--- exceeding wire load | ratings | solar_current->---14A--->+<------14A--<--Breaker<--Panel ^ | Not tripping cause it only sees 14A