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: 0kWh (diversion now 0W, ...)

Heat battery control log entry: 2026-05-16T07:31Z MT 0 GI 164 IT 35 F RS2CN ES 6

Putative current raw top-up level (when allowed): 56% (normal min 0%, max 100%).

Eddi output priority 2: Thermino heat battery.

Eddi state 6: stopped (low grid frequency or diversion prevention) STOPPED 2026-05-16T07:31:01Z 123W frequency low at 49.89Hz

Flags/status:

• [MT] 0% heat battery Maximum Top-up level: 0%
• [GI] Grid Intensity gCO2/kWh: 164 (7d mean 118)
• [IT] Grid gCO2/kWh Intensity Threshold below which discretionary top-up is allowed: 35.
• [F ] expected grid demand from High (peak) / - (normal) / Low (off-peak).
• [F S] grid response; Stopped boost/divert.
• [F R] grid is Red (high) intensity, or unknown [r].
• Recent (6/8) full days excluding today when heat battery did not fill [nFnnnnFn]: 75%
• Recent DHW cylinder pasteurisation days including today, tank maximally Hot [--H-----------H----].
• Grid frequency response minutes today (~100% of active): 1

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].