I'm not sure if this is the best place for this vs other energy related threads, but this boils down to
"What a year of solar looks like". Something I wanted to do since I'm essentially at the anniversary of solar install + Octopus switchover.
I've included some actual numbers here, including what I've wound up being billed, and the picture is pretty rosy so far.
Spreadsheet looks OK to me but may not be 100% easy to read, hopefully it makes sense.
My consumption is fairly high as shown, with not much deviation between months, with 6329 kWh recorded across a year, that is an average of 17.33 kWh per day.
Generation at 4538 kWh came in a little higher than initial estimates (4.8kW system but imperfect placement and some shading). Pretty happy with the overall generation as my estimates were more like 4000 for the year.
Electric data is split between Go and Flux, and I've shown where I moved between them and the associated impact of doing so. I probably should still be on Flux a little longer to really maximise these figures.
Going to Flux from late April => late August earnt me £437 despite the challenging latter half of the summer in weather terms, which for 4 months was pretty good I thought (though I'm sure
@Ron-ski will laugh at my pathetic figures!
)
I was quite surprised that after all figures were accounted for, I wound up being charged more for Gas than Electric for the year.
These figures do not take into account any other benefits such as:
- Gov winter fuel payments (think that was a total of £400~?)
- Octopus Saving Sessions (my total for that was about £100 earnt as I recall)
- Octopus Referals (£50 a time, have had a few).
I'd be surprised if, on balance, I am not actually negative on this for the year, meaning Sep 2022 - 2023 has likely not cost me anything at all on billing. Ignoring incentives, £700 is still extremely competitive.
If I had paid for the 6329 kWh of electric I used at £0.30 that is £1898. With the gas at £421 that would be a grand total bill of £2319. £2319 - £694 = £1625 saved.
My 4.8kW system with 8.2 kWh battery cost me £8500, so I'm essentially down to a real term cost of £6975 left to go before it's returned the cost to me, not accounting for inflation.
According to Home Assistant I have cycled the battery 473 times, an average of 1.3 times per day.
)
