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: 0.095kWh (diversion now 0W, DHW h1d=0.0 h1b=0.0, heat battery h2d=0.1 h2b=0.0)

Heat battery control log entry: 2026-07-29T15:51Z MT 0 GI 200 IT 0 F FHRS2CN ES 6

Putative current raw top-up level (when allowed): 39% (normal min 0%, max 100%).

Eddi output priority 2: Thermino heat battery.

Eddi state 6: stopped (low grid frequency or diversion prevention) STOPPED 2026-07-29T15:51:01Z -1039W grid 7d red carbon intensity

Flags/status:

• [MT] 0% heat battery Maximum Top-up level: 0%
• [GI] Grid Intensity gCO2/kWh: 200 (7d mean 122)
• [IT] Grid gCO2/kWh Intensity Threshold below which discretionary top-up is allowed: 0.
• [F H] expected grid demand from High (peak) / - (normal) / Low (off-peak).
• [F S] grid response; Stopped boost/divert.
• [F F] good Forecast PV generation tomorrow.
• [F R] grid is Red (high) intensity, or unknown [r].
• Recent (5/8) full days excluding today when heat battery did not fill [nnnnFFFn]: 62%
• Recent DHW cylinder pasteurisation days including today, tank maximally Hot [--HH----H-----HH---].

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].