If you do that, you'd then need to find a way to supply 98% of the power 2% of the time. It helps, but not much.

It would also be better if you ate only vegetables and drove an ultralight (ebike) good luck. I personally like being able to turn on my lights 100% of the time

The heck kind of lights are you running that won't go all night on a battery that fits in your palm?

The one in my oven.

It's not about lights, it's about electricity always being available. And well, always having power available (for domestic, but also for expensive production facilities that looses money while idle) using renewables is a lot more expensive than generating most of your power with renewables