Articles

With a prediction horizon of 24 hours, EMHASS plans an export every evening. Why I moved to 36 hours, how the prices are filled in and why 48 hours failed.

Shelly Pro 3EM showing negative power under load, but a normal value in standby? The current clamps are on the wrong phase. Here is how to check.

An LG Therma V reports 1200 °C via Modbus when the outdoor unit is not communicating. This is how you keep that error value out of your graphs and COP…

For three days the Modbus values of my heat pump in Home Assistant stood still, without a clear error. How to recognise and monitor frozen values.

My Deye home battery exported itself from 81 to 25%. The cause: Allow Export on every discharge and two automations writing to one inverter.

Errno 11 exclusively lock port in Home Assistant: two integrations share one USB-RS485 adapter. The fix: give each bus its own adapter, on a fixed path.

The LG Therma V R290 reports hot water, heating element and cooling via Modbus. Three of those status bits turned out to be unreliable. This is how I detect the…

After a Home Assistant restart, EMHASS calculated with a SoC of 50 % instead of 57 %. The lesson: no optimisation without a real battery level.

An EMHASS deferrable load for hot water that plans a full hour on every run keeps shifting all day. The fix: send the remaining hours in the payload.

With a horizon longer than 96 steps, the naive load forecast in EMHASS shifts by exactly the number of extra steps. This is how I built my own load forecast.

Since a Kia update, around July, the e-Niro falls asleep when charging stops for a moment, and after that it no longer accepts power. This is how I let evcc…