Evolving this line of thought further, if you do not want to disconnect from the grid, there's also an option to participate in the electricity market. Someone

Evolving this line of thought further, if you do not want to disconnect from the grid, there's also an option to participate in the electricity market. Someone with a battery can buy up cheap electricity at night or whenever their electricity supplier deems it off-peak and thus cheap, so a battery can heavily influence the average price of energy as calculated here by Michael de Podesta: https://protonsforbreakfast.wordpress.com/2025/02/16/the-most-expensive-month-of-the-year/ https://protonsforbreakfast.wordpress.com/2025/02/16/the-mos... The other way to participate in the electricity market is that in EU the end users can access a plan that in some way reflects day-ahead market prices. If you have a battery, you can now buy the midday solar dip around 0 eur/mwh energy plus network charges and sell at the evening price of 300 eur/mwh.