We're talking to lots of 'experts' in relation our new house build and the raft of eco measures we HAVE to include as a condition of the planning consent.
Even though they're selling the technology not one of them is fully behind it.
We have to have an air source heat pump and an ev charger, it's logical to have PV panels and batteries.
Our neighbour's ashp routinely cuts out when the temperature drops to zero.
The PV panels are only fully efficient in the summer.
The battery seems like a good idea as long as you have a good off peak rate to charge it up when the panels aren't generating any electric.

With regard to EV crashes, it's the lithium that's the problem. It can be incredibly unstable, it seems to have a mind of its own...... it'll just decide it wants to burst into flames for no apparent reason.......🤷🏻‍♂️