Home battery storage

[fattony]

hi

I’m looking into the possibility of installing a battery storage unit, when the EV is not charging we used 15 - 20kw a day.

Electric tariff is Octopus intelligent, car charging is 7.5p per kw.

I know Octopus can integrate with the Tesla powerwall 3 but it references solar, we don’t have solar and not sure we want it, just looking to charge the batteries between 00:30 and 05:30 and then use this stored energy during peak times.

Is there a way to control this so if usage spikes it switches to batteries (like hot water, oven & hob) and can these be just used without solar?

Thanks

 

[StephenStephen]

Do you mean 15 - 20 kWh/ day?

Have a look here: https://www.speakev.com/forums/home-energy-generation-and-storage.419/

 

[fattony]

Yes sorry kwh/ day, I’ll have a look thanks

 

[ericmark]

I have looked at just batteries myself, I have solar and batteries, and the inverter does all, so not sure on costs without solar. The solar will not really work without the battery, but using the battery without solar so with my system I have 2 batteries 3.2 kWh each, without solar would need the maximum my inverter can have, which is 4, so around the £4k mark for batteries, my inverter is 5 kW, so it will not power the shower, but will power nearly everything else. The charge/discharge would be limited by the inverter, so 5 kW in my case.

Looking at internet I would say looking at around the £6k mark for inverter and battery.