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Performance Self-Powered and Solar Offset graphs don't seem right?
New Solar and PW (2 PW) customer questioning the accuracy of the performance graphs. I am getting marginal Solar from my new installation because of winter conditions. In a 24 hour period, I am using PW and Solar approximately 13 hours. Solar from 8 am until 4 pm, and then PW's between 4 pm and 9pm. Nothing is returned to the grid, and the PW's are only getting charged to a 40% capacity during the day hence they stop producing at 9pm.
My graphs Self-powered shows 69%, and the offset shows 71% energy offset.
Based on the above those reports can not be right with 13 hours of Solar, and Battery, and 11 hours of Grid.
It is more like 50/50.
How does Tesla generate these numbers for these reports?