We noticed recently (OK my wife noticed and now I am tracking the data to find the cause) that the total power generated to date reading on the Inverter (the bit that the data for the graphs comes from) is higher than on the Generation meter (the bit we get the feed in tariff paid base on). So assuming that this difference is the loss due to the long cable run (the inverter is in the loft/attic a good 5 meters up) I am now tracking the differences for analysis.
Inverter total power to date = 955.99 kWh
Generation meter power to date = 954.3 kWh
difference is 1.69 kWh or roughly 0.18%
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