Same experience here with my static. Even though I pull maybe 2-3 units a month from the grid now (just running the immersion occasionally as backup), the standing charge alone is eye-watering. I'm on Octopus and it's crept up to around 61p/day just to be connected. That's £220-odd a year for the privilege of barely using the thing.
The real kicker is that the standing charge has risen faster than the unit rate in recent years, which completely inverts the logic of going off-grid. Your reward for reducing consumption is... a higher effective cost-per-unit on the tiny amount you do use.
I've been seriously weighing up whether to disconnect entirely. My Victron Multiplus-II handles the heavy lifting, Fogstar batteries are holding up well after 18 months, and I've got enough solar capacity that grid dependency is basically psychological at this point rather than practical.
The counterargument I keep coming back to is grid export — if you're on something like SEG (Smart Export Guarantee), staying connected at least partially offsets the standing charge. Though the rates being offered are pretty laughable compared to what you're paying to import.
Has anyone here actually gone fully off-grid and cut the DNO connection entirely? Curious whether the disconnection/reconnection cost makes it a false economy if you ever need to hook back up. That's the thing stopping me from pulling the trigger — the reinstatement charges can be substantial depending on your DNO region.
Would be interested to know what others are paying in standing charges and whether the maths is starting to tip toward full disconnection.