1. Reduce heat entering the building
Assess shading, glazing, ventilation and measured temperatures. Ask which measures can improve comfort without additional equipment. Specify the rooms and occupancy hours. Size the system for the building and its occupants rather than available photovoltaic capacity alone.
2. Distinguish active and passive cooling
Active cooling uses the compressor in a system designed for that function. Passive cooling can use a suitable underground source with water circulation; its auxiliaries also consume electricity. Confirm the exact function, additional components and model limits. An air-to-water unit does not gain passive cooling through a simple setting.
3. Check distribution and humidity
Have underfloor circuits, radiators or fan coils assessed for cooling suitability. Ask how controls monitor humidity and the dew point to limit condensation and damage. One fixed temperature for every building is insufficient. Specify maintenance, condensate drainage and comfort limits for each room.
4. Compare demand with solar generation
Use generation and demand at matching hours, then check control of the actual installed model. Include circulation, ventilation and consumption when sunshine is insufficient. Confirm a compatible interface and settings; a protocol name does not establish that two devices work together. Preserve comfort and building protection before seeking more self-consumption.
5. Request a complete quotation
Include design, distribution, controls, works, maintenance and expected consumption. Check procedures for the cooling function with the competent authorities. Supplying the device with solar does not replace that check. Compare options using the same comfort requirements and an annual estimate of residual electricity purchases.