Solar, is it worth having a battery in my case scenario?

shamanicone

Hi, I have room for about 13 x 460w Aiko panels with a 10 Kwh inverter (and that's the plan), I've been allowed 3.9 Kwh export by my DNO and I use 3200 Kwh average electricity a year. 

I currently don't have a heat pump or EV.

Is it worth my while having a battery at this stage based on my usage please (I've been quoted approx £3k extra for a Tesla PW3 and backup gateway over the panels)

Thanks 

nakie999

Yes, based on your usage, a battery may not give you strong value right now. You use about 3200 kWh a year and you do not have a heat pump or EV that would increase your evening demand. Most of your solar generation would be during the day when usage is lower. In that case much of the stored energy might not be used fully.

A battery becomes more cost effective when you have higher evening use or when you plan to add an EV or heat pump in the future. If you think you will add either within the next few years, the battery could make sense later. For now, you can install the panels and monitor your actual export and usage patterns. This gives you real data so you can decide later with more confidence.

Screwdriva

Your usage is low but the Powerwall 3 has access to intelligent flux, which should hasten your payback window. 

Not sure what you've been quoted but a 6.5kWp (13 X 500W bifacial Eurener panels) paired to a PW3 should cost < £11.5K installed, with bird netting and 10 year workmanship warranty. 

shamanicone

Screwdriva said:

Your usage is low but the Powerwall 3 has access to intelligent flux, which should hasten your payback window. 

Not sure what you've been quoted but a 6.5kWp (13 X 500W bifacial Eurener panels) paired to a PW3 should cost < £11.5K installed, with bird netting and 10 year workmanship warranty. 

9.5k for 13 x aiko gen 3 panels, PW3 & gateway, bird netting

Screwdriva

I’d ask them to swap panels for Eurener and go for it! 

I’d check their workmanship warranty duration too.