u/Bikeything

I already have 11 solar panels, a GivEnergy inverter and 5Kw battery + GivEnergy EV charger. So Givenergy has gone bust. Not good but it is still all under the installer's warranty

I want to add another 10Kw battery and add a gateway in case of power cuts or the apocolypse (whichever comes first).

I've contacted the original installers for a quote and they've come up with 2 options with rough prices:

A) Fit an extra 10Kw GivEnergy battery (cheaper but obvious warranty problems)

B) Fit a Fox 11.5Kw battery which would also need a Fox inverter (costing £800-£1200 fitted).

Both batteries would be about £4500 fitted, the GE one being slightly cheaper.

A gateway would be about £1000 fitted.

My questions are:

Do the quotes seem reasonable?

Which option would you go for & why?

Any other thoughts such as whether Fox gear is good etc

Thanks folks