Battery installed excluding VAT £8700. It is expensive. I am in discussion to include solar to benefit from the VAT reduction. Neverless, even with the VAT reduction, solar takes a very long time ROI. At todays rates for battery and solar from other brands are not cheaper. Unless you go complete DIY, then there is a saving to be made.
Vs the suggested Oct price cap based on my useage, it could save me up to £2160 a year. Everyones mileage will vary. For some, its completely not worth it.
How have you calculated that?
I found the maximum realistic return to be about £1600 per year, assuming 100% capacity used every day, the 90% conversion efficiency they quote, a unit price of £0.42 (Oct rate assumption), and only paying £0.045 to charge it
If you move to £0.075 incoming per unit it drops to £1400 per year.
When I played with ROI I found panels to be pretty similar to batteries in reality, certainly with reasonable assumptions, being made.
Im in the process of trying to spec a system design before asking installers to quote/advise, I want to achieve a reasonably consistent quote in order to be able to compare.
What makes it tricky is they become complimentary at times. Excess solar in say May-Aug will charge batteries for free, to use off peak.
Batteries to be charged from the grid in the low generation months on a reduced tariff.
Have you actually found a tariff you can move to, when I looked a month or so ago the only variable priced ones (cheap overnight units) were no where close to the 4.5/7.5 rate.
BG was 20p but more for day units. You also lost your cap protection in effect.
Have you looked into the Octopus Tesla only tariff? If its still available thats really good.
