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: 2026-03-07T00:01Z MT 0 GI 166 IT 50 F bvx1N ES -

Putative current raw top-up level (when allowed): 75% (normal min 0%, max 100%).

Flags/status:

• [MT] 0% heat battery Maximum Top-up level: 0%
• [GI] Grid Intensity gCO2/kWh: 166 (7d mean 151)
• [IT] Grid gCO2/kWh Intensity Threshold below which discretionary top-up is allowed: 50.
• [F ] expected grid demand from High (peak) / - (normal) / Low (off-peak).
• [F B] Enphase AC Battery SoC too high to allow transfer to heat battery, or unknown [b].
• Recent (8/8) full days excluding today when heat battery did not fill [nnnnnnnn]: 100%
• Recent DHW cylinder pasteurisation days including today, tank maximally Hot [-H----------------].

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].