9.5kw batteries without solar panels

3 Posts

Hi all, my roof is quite shaded and as a result I was wondering how cost affective it is to purchase 2 x 9.5kw batteries and store up energy at night.
What are the best companies that include installations and what kind of prices are we talking about ?
I am in Harrow, London
Thanks
What are the best companies that include installations and what kind of prices are we talking about ?
I am in Harrow, London
Thanks
0
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Replies
Otherwise, do you really need 19kW of power? Or is it 2 x 9.5kWh?
.withdrawal, NOT withdrawel ..bear with me, NOT bare with me
.definitely, NOT definately ......separate, NOT seperate
should have, NOT should of .....guaranteed, NOT guarenteed
Batteries have an average of 16 year payback, even poor performing solar would probably still payback faster.
Spend a day reading threads over on the green sub forum. https://forums.moneysavingexpert.com/categories/green-ethical-moneysaving
Battery losses - most batteries have a c.10% round trip loss.
VAT - batteries attract 20% VAT whereas solar and a battery do not.
Your import cost compared to what you actually save. There are more tariffs available for solar and batteries than just a battery.
19 kW of batteries will give you about 14 kW of usable storage - if you're lucky and charging that at 7.5 p/kWh each night (and you're using enough electricity to drain the batteries every day), then you might be able to save about £5/day, and get a payback in 7 years. However, if you can't get those rates, or if the rates change, or if your actual usage is less, then the payback period starts increasing beyond the life of the batteries.
To be honest, most installers won't think you're serious without PV as well, and will think it's a waste of their time to quote. It took me 10 months from quote to installation of our battery system, I know some people have been waiting for a year now.
Electricity: about 3kw south facing solar array, EV, Octopus intelligent, thinking about getting a battery...