Same experience here. Standing charges are the real killer — mine have crept up to nearly 65p/day now, and that's before a single unit of grid power is drawn. When you're pulling maybe 2-3 kWh a month from the grid (mostly cloudy winter weeks when the narrowboat solar just can't keep up), the standing charge represents the vast majority of the bill. It's almost comedically disproportionate.
The cynical reading is that network operators are recovering fixed infrastructure costs from a shrinking pool of high-consumption customers, because the rest of us have fled to solar, batteries, or both. So the more people go off-grid, the higher the standing charges climb for everyone remaining partially connected. It's a bit of a death spiral for the grid-dependent.
I've seriously considered dropping to the lowest available tariff and just accepting the occasional grid top-up, but even then the maths barely shifts.
Worth noting — anyone running a Victron MultiPlus setup with a proper ESS configuration might want to revisit their grid connection settings. I've found tightening the feed-in/draw thresholds means I'm genuinely touching the grid far less than my meter suggests, which raises questions about standby draw from the inverter-charger itself.
Has anyone actually gone full DNO disconnection? Curious whether the admin burden and potential reconnection costs are as bad as people suggest, or whether it's actually viable if you've got solid battery backup (running Fogstar lithium here, no complaints).
Would be interested to know what regions people are in — standing charges seem to vary quite a bit by distribution network operator.