https://tradingeconomics.com/germany/electricity-price chart is extremely noisy, and is quoting wholesale rather than retail, but to my eyes that actually looks flat over the period from before the Ukraine war. It seems to have started that spike in late 2021, before the war in February 2022 (which of course shoots it upwards, that's the "doubling in late 2022" you mention).
> (which of course shoots it upwards, that's the "doubling in late 2022" you mention).
i guaranty you that my electricity costs were 22c in mid-2022, jumped to 47c in either late 2022 or January 2023, and just went up from 47c to i don't know what in February (i got the notification of an increase but didn't bother logging in to see the new prices).