Earth Notes: Heat Battery Grid Top-up Maximum

(See the control parameters, logs, dataset and backstory.)

This page shows the maximum percent-full to top-up to from the grid, if any, for the DHW heat battery.

Diversion plus boost today: 0.021kWh (diversion now 0W, DHW h1d=0.0 h1b=0.0, heat battery h2d=0.0 h2b=0.0)

Heat battery control log entry: 2026-07-09T13:06Z MT 0 GI 178 IT 42 F FqpS2CN ES 6

Putative current raw top-up level (when allowed): 23% (normal min 0%, max 100%).

Eddi output priority 2: Thermino heat battery.

Eddi state 6: stopped (low grid frequency or diversion prevention) STOPPED 2026-07-09T13:06:02Z -2519W postponing Thermino until solar noon or grid 7d green

Flags/status:

[MT] 0% heat battery Maximum Top-up level: 0%
[GI] Grid Intensity gCO2/kWh: 178 (7d mean 126)
[IT] Grid gCO2/kWh Intensity Threshold below which discretionary top-up is allowed: 42.
[F ] expected grid demand from High (peak) / - (normal) / Low (off-peak).
[F S] grid response; Stopped boost/divert.
[F F] good Forecast PV generation tomorrow.
Recent (3/8) full days excluding today when heat battery did not fill [nFFFFFnn]: 37%
Recent DHW cylinder pasteurisation days including today, tank maximally Hot [--------H----H-H---].
Grid frequency response minutes today (~100% of active): 1

last 24/48h — Previous day and today: heat battery max % fill/target from grid, grid intensity, intensity threshold, eddi state (black=stopped=60, red=full=50, yellow=boost=40, green=divert=30).

External control tables:

Expected grid demand by local hour of day [CSV].
Grid intensity limit by demand level [CSV].
Minimum (low-carbon) top-up by day of week [CSV].