In answer to your question, yes, it would save electricity as some of it is being produced from the panel. You would not need a feed in tariff meter, just a net meter so you can spin the meter backwards or forwards and pay the "net" at the end of the month. Before you hook it up you need to get approval from your utility. They will almost always grant this, and they you can hook it up.
There is no relay needed since the inverter will automatically shut down in the event of a power outage. Otherwise, it is not designed to hook up to the grid.
And of course, don't forget, in most places in the US today, solar is one of today's greatest investments!
· 7 years ago