Steve's Blog

Random musings

Solar - Year Three in Review

Published on: by Steve Scott

1 min read

System Design

  • 3.95kw array, southw-est facing, located in Surrey UK
  • 9.5kwh battery
  • GivEnergy G2 3.6kw Inverter

PV Production

  • MSC Prediction 3684 kWh
  • Real world production 3722.5 kWh

Grid

  • Grid Import 7939kWh, almost entirely during the 5.2p cheap window (Huge win), but it fell short on most days in Mid Nov - Mid Feb
  • Export 2240 kWh.

Financials

Ancillaries

Approx £31 extra made out of Octoplus payments (Mostly from Greener Nights) and £89 made from Axle

Bills

£250/month bill down to £64, another £2200 paid off the system - still looking good for a 6-7 year payback. This includes running 1 EV

Commentry

The system has continued to perform well, and Home Assistant / GivTCP do a great job of looking after it. Coming into the next year, there is more uncertainty. Right now I'm doing well out of Agile export, but static export rates are down and might slightly slow payback. GivEnergy has filed for administration, it's unclear what will happen with the 10 year warranty. That said, installers report the systems to be fairly reliable and warranty work uncommon. I'm also hoping that Octopus will honour the warranty (should it be required) as the warranty is provided on their paperwork.

In any case, in just 3 years I'm at 50% payback for the system. If additional work is required this would suck, but ultimately it would simply push by payback back a little

Registers

(Reference for me for next year) PV: 11,084 Grid In: 20,152 Grid Out: 4,824

Solar

Related Posts