A report on our property's electrical system, which includes two solar arrays and a Tesla Powerwall 2 with Backup Gateway, for the month of October 2023.
The 3.92 kWp SW array was installed in October 2011 on the roof of the house which has a pitch of about 30° to the horizontal and azimuth 227° M.
The 3.05 kWp SE array was installed in January 2020 on the roof of the garage which has a pitch of about 60 degrees to the horizontal and azimuth 137° M.
The Tesla Powerwall, which has a nominal storage capacity of 13.5kWh and maximum continuous discharge rate of 5kW, and Gateway 2 were also installed in January 2020 in the garage.
The property is served by a three phase grid supply, rated at 100A on each phase, via an Economy7 phase netting meter which has cheap rate from midnight to 7am GMT (1am to 8am BST).
A zappi car charger was installed in the garage in April 2021 and a fully electric (BEV) car arrived, two months later than expected, on the 28th of May 2021.
The property consists of a detached house and an annexe (a Studio flat above the garage) and the figures shown cover the electrical activity in both residences. The usage is high in the winter due to the annexe being heated by two electric storage heaters, and this cost is covered by the rent paid by the tenant but is included in the figures in the video as it is not possible to exactly separate the electrical usage of the two residences. The main house is still centrally heated by an oil boiler.
