Building thermal model
Daily pump consumption versus degree-days, fitted from at least 10 full days. You see the fit quality (R²) in the panel.
A heat pump is often the largest load in the home. HEMS learns how much energy your building needs at a given temperature and shifts the pump’s work to sunny or cheap hours.
Daily pump consumption versus degree-days, fitted from at least 10 full days. You see the fit quality (R²) in the panel.
Blocking in expensive hours and recommended switch-on with PV surplus. Forced switch-on is never used automatically.
Viessmann ViCare (DHW temperature and one-time DHW heating), Mitsubishi MELCloud and MELCloud Home (on/off, DHW) and Tuya devices with a code map.
The pump’s own protections — minimum temperatures, compressor protection — work independently of HEMS.
Connect the pump: Modbus (e.g. NIBE S1155/S1255), two SG Ready contacts or the manufacturer cloud integration.
HEMS measures power draw and builds the thermal model from weather data.
The plan for the next hours takes prices, PV forecast and weather into account.
Mode changes go through the Command Gateway and are recorded.
The pump keeps its own protections and minimum temperature settings — they work independently of HEMS. Forced switch-on is never used automatically, and you can turn automation off with one button.
If the manufacturer offers a cloud supported by HEMS (ViCare, MELCloud, Tuya), control goes through it. Check the list of supported devices.
It depends on the data: it needs at least 10 full days with the pump’s consumption measured. The R² value in the panel shows how well the model fits your building.
Nearest IMGW station, warnings with battery reserve and trips from an iCal calendar.
More →From recommendations to full battery automation — with a simulation mode and a one-click emergency stop.
More →Return on investment from measurements: daily savings, NPV, IRR and forecast payback period.
More →Create an account, connect your inverter or the manufacturer cloud and see your data. You switch on automation only when you want to.