Talk Morgan Forums Community The Malvern Arms Off grid and power walls etc

On Monday we finally got the solar batteries installed. The kit consist of an AC to DC & vice versa inverter plus two li Iron batteries giving 2.4 kWh each so 4.8 kWh as installed with 4.2kWh being useable. If we modified the PV array inverter we would lose our Feed In Tarriff which is roughly £350 pa & remember we get that automatically even if we consume all we generate. If you don't have a FIT one common inverter for the array & batteries might be more sensible.

This November to before the install we bought & used 6.8 kWh / day and last November with poorer weather 8.9 kWh. The difference might also be that in 2021 my MIL would spend the weekend in our conservatory watching the birds in the garden & we heat that electrically underfloor. Now she is basically bed ridden so not coming at weekends.

Tues we generated 6.5kWh. We consumed 8.66 kWh. The batteries stored & delivered 5 kWh & the pv array 1.5kWh so we bought in 2.16 kWh.

Wed despite very poor weather till noon we generated 4.8kWh, we consumed 6.6kWh (the difference was no laundry was done on Wed). The pv array supplied 1.8kWh and the batteries 3 kWh. We bought in 1.8 kWh.

The cost was £3.3k but I undertand that has increased as ours took 14 mnoths to deliver from order due to COVID etc.
Payback I'm expecting to be under 5 years. Based on 2 days it is already looking promising.

So not off grid but in May to Oct we buy 4kwh/ day so we will be.