Daikin · Tesla Powerwall · Huawei Backup
Cool the villa. Power it from the roof. Keep the lights on.
Algarve summers hit 35–40°C, winter still needs heat, and the grid is not as quiet as the sea. This planner sizes your rooms the way we do on site, then shows the solar and battery that make the system pay for itself.
Lagos to Tavira · Mon–Sat 9:00–18:00
Daikin outdoor · PV on the roof · battery in the garage
Four seasons, one system
Design day 33–38°C. Correct BTU stops short-cycling, mould, and guest complaints.
Shoulder months. Dehumidify, service the outdoor unit before salt air settles in.
Mild, not tropical. A Daikin heat pump replaces electric heaters at 3–5× efficiency.
Solar install season. Roof still produces ~60% of summer yield — and AC is off.
The all-in-one stack we actually install
Daikin heat pump
Premium installer. Blue-fin coils for coastal salt. Cooling and heating from one indoor unit.
Solar PV
3,000+ sun hours. Summer AC is a daytime load — the panels run the comfort that used to wreck the bill.
Battery + backup
Tesla Powerwall 13.5 kWh, or Huawei LUNA with Backup Box. Outages under 3 seconds, not candles.
Why Algarve homes are not a UK sizing chart
- 01200–250 BTU per cubic metre — intense sun, west glass, and thin older envelopes.
- 02Salt air eats cheap condensers. Specify coastal-ready Daikin, then service every year.
- 03Portugal requires a certified fitter to charge refrigerant. The calculator is the start, not the sign-off.
- 04Holiday lets: guests run AC all afternoon. Size for occupancy, then solar for the bill.
Start with the room, finish with the roof
Use the BTU calculator (the same method as algarveseasons.com), add every room, and the plan will recommend a multi-split, a kWp of solar, and whether a Powerwall earns its keep.