Will be great to hear how you go with a domestic install numbers...

I would be very interested once you get it sorted to see how the numbers work for you. Are you using on a industrial site or just time shifting at home and considering using off peak.

Will be great to hear how you go with a domestic install numbers so please keep us up tpo date and if there is a long lead time to get a battery.. In regards to inside the garage with the insurance companies ATM considering the fire factor with lithium batteries but will IMO group them all together you may be better to have a "outhouse" against the fence line IMO. Insurers are seeing some things like solar panels and batteries as a reason to add a premium to premiums and once one does it all will. So speak with insurer you are likely to use for finished house and see if they have any details regarding if a battery is installed.?

Good luck with the housebuild.