I mean, we have batteries. Having enough storage to get through the night is basically solved.
The bigger issue is a several day stretch of no solar where your batteries can't support. This would basically solve that allowing homes to effectively built to be off grid to begin with.
Hydrogen...? Gonna have to live real energy-cheap though. Not much heating/cooling, good insulation, less bathwater, less appliance use, as little driving as possible. Honestly relieved that computer and internet use is lower on the list, but eventually that too.