Noticed exactly this on the shepherd's hut meter over winter. Barely pulled anything from the grid — the Victron MPPT and Fogstar lithium bank were handling the bulk of it — but the standing charge alone was quietly eating £35+ a month before a single watt crossed the meter.
That's the bit nobody talks about enough. Standing charges have crept up something extraordinary over the last couple of years. Ofgem keeps adjusting the unit rates and everyone watches those like a hawk, but the daily standing charge is where they're quietly getting you regardless of consumption.
On the boat it's even more pronounced. Shore power connection at the marina has its own tariff structure, and again — minimum spend just to stay connected is brutal.
My honest take after years of building out off-grid systems: the economics have fundamentally shifted. It used to be that reducing consumption was enough. Now you almost need to question whether grid connection itself is worth the cost if you've got decent generation and storage capacity.
Anyone else running the numbers on what actual grid independence would look like versus just grid reduction? I've been modelling it for the hut — the DNO disconnection process is more straightforward than people assume.
Curious whether others are finding the same across different setups.