What is your solution for high energy prices?

So, I was on holiday in January and returned 30/01. Started doing laundry, making some dinner at the same time, apparently was at 8000W at one point. Got the invoice. 35€ in electricity cost 40€ network cost because of ‘capaciteitstarief’. This is insane. Based on 1 day charge a surplus on all days usage …

So… been looking into batteries for a while but it doesn’t cover the cost, keeping in mind the lifespan of a battery.

Maybe there is some future in dynamic charging at night when electricity is cheaper and using it during the day. I think there are a lot of variables to take into account to have a positive case.

DIY batteries is also a thing, but don’t think they are allowed in Belgium.

What is or has been your solution (besides using less and watching simultaneous usage) to lowering your energy bill?