Tesla has switched on Heat Pump Optimization for Powerwall owners in Europe. "Your heat pump is one of the biggest electrical loads in your home," Tesla Energy posted on X at 03:25 UTC on 30 October 2026. The feature "allows your Powerwall to boost heating when there's surplus solar or energy is inexpensive, helping you save money when rates are high". The post says it is available with the Powerwall 3 and the three-phase Powerwall 3P in Europe, and Elon Musk reposted it.
What it does
The Powerwall treats the heat pump as a load it can schedule. When the house has spare solar or the tariff is cheap, it tells the heat pump to heat more, storing that energy as warmth in the building. When rates are high, the home needs less from the grid.
Tesla's 30 October post names no protocol. Four days earlier, on 26 October, Tesla Energy wrote in Dutch that Powerwall 3P installations had begun in the Netherlands and could now be integrated "with your SG-Ready heat pump". SG Ready is a German label for a standard switching interface: two contacts let an outside controller block the heat pump, run it normally, recommend a boost or order one.
| Item | What Tesla has said |
|---|---|
| Feature | Heat Pump Optimization |
| Powerwall models | Powerwall 3 and Powerwall 3P |
| Region | Europe |
| Heat pumps | SG-Ready (Dutch post, 26 October) |
| Price, countries, setup | Not stated |
From app code to launch
TeslAnt first reported the feature as dormant code in Tesla app 4.57.5 in June. The code described the app running the heat pump to pre-condition the home beyond its normal limits when solar overproduces, then returning to its standard targets. In July, app 4.58.6 still listed heat pump control as coming. The 30 October post is the first time Tesla has said it is live.
It follows Wall Connector smart charging earlier this month, which lets a Powerwall system time a car's charging around solar or cheap power. The heat pump is the second large household load the system can now steer.
Who can use it
The Powerwall 3P is the three-phase version Tesla built for European homes. It went on sale in Germany on 23 April, the Netherlands on 12 August and Portugal on 4 September, as TeslAnt noted when Powerwall 2 and Powerwall 3 systems were allowed to share a house. The post names only the Powerwall 3 and 3P, so Powerwall 2 systems do not appear to be included.
Tesla has not said which heat-pump brands it has tested, whether a relay or an installer visit is needed, which European countries have the feature, or which Powerwall firmware and app versions carry it. Until it does, the only requirements Tesla has named are a Powerwall 3 or 3P and, in the Dutch post, an SG-Ready heat pump.