The inverter I'm using actually claims to not back feed to the grid but
only to supply power that one is using personally. In the ad they describe
the meter running backwards and people getting charged for giving
electricity so they understand the situation . I'm not sure I believe
this claim because detecting what the house is using and what's going to
the grid does not seem easy without something monitoring the power going
out of the house. I can turn everything off in the house and see. The grid
tie inverter that I'm using can run on batteries and I'm using it in the 96
volt mode which goes up to about a hundred and thirty volts. In maximum
power point tracking mode it goes up to 180 volts. I have three cars wired
up with 30 cells leaf and Tesla batteries. They all plug-in together in
parallel , solar panels , tie inverter and three cars. The BMS of each car
will shut off if the voltage gets too low or high and take that one car out
of line. In general I use about 10% of a car's charge at night. It's been
running about a year now but it constantly changes. At one time I talked to
the utilities about getting a different meter but it was a little expensive
and it's how I came up with this idea that I'm using now.
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