The first difference was the billing period. In 2022, it was from 20 April to 26 June (67 days) and in 2023 it was from 30 April to 16 June (48 days). I therefore used a multiplier of 0.72 on the 2022 figures so that the period was effectively the same. Obviously the weather has been very different this year so are talking of an approximation of probably ± 20% (positive, more sun; negative, higher temperature et cetera, last year). So, my total consumption last year was 945×0.72 effectively about 680 kWh.
This year, the EAC billed me for 589 kWh and the PV system generated an approximate 546 kWh for the last 32 days of the period. By my reckoning, the total input to the system during the whole of the last period was 589+546 = 1135 kilowatt hours, which seems plain ridiculous.
I'm obviously misinterpreting something and it's driving me bonkers. Can anyone help an ancient idiot to understand what is happening, please?
