50 cubic metres out — and still counting correctly
My gas meter has two data sources: an accurate one days behind, and a current one with a wrong starting value. Only together are they worth anything.
Series
What lands on the bill?
Meters, standby load and forecasts made understandable.
6 articles
My flat tells me the electricity bill in advance
At 23:50 on the last day of the month a notification arrives with consumption, cost components and the expected bill. What the forecast can do and where it ends.
The power nets out, the energy does not
The house meter measures three phases. It nets the power against itself but adds the energy up — which makes its counters useless for the dashboard.
Measure fast, set slow
The solar battery offers nothing locally. The trigger arrives instantly from the house, the action travels halfway round the internet — that decides the design.
I checked 25 invoice lines — and my own device was wrong
Two years of gas bills recalculated line by line: largest deviation 0.016%. The number that was wrong came from my own meter reader.
The current clamp sat differently from the plan
One meter in the distribution box, two clamps — and the assignment was swapped. A lamp proved it, its own reading only 1.2 watts away.