Rahul Somvanshi
If you have a Tesla Powerwall 3 or 3P and a heat pump in Europe, a new software feature may change how it runs. Tesla Powerwall heat pump optimization is live in Europe only. It needs a Tesla-certified installer to wire the battery to the heat pump.
The feature needs Tesla app version 4.59.1 or later and firmware 26.26 or later. It works on the Powerwall 3 and Powerwall 3P. The Powerwall sends the heat pump one of two instructions: run normally, or boost. It uses two relay contacts on the heat pump to communicate four operating states. Heat is typically stored in a domestic hot water or buffer tank. Heat pumps move heat from outside air into a home using electricity.
Homeowners in Europe with a compatible heat pump should check the app and firmware requirements before expecting any change to heating running costs. Ask your installer which heat pump settings the system will change. Check that the heat pump supports SG Ready, a label the German Heat Pump Association introduced in 2012 with 17 manufacturers.
Tesla Powerwall heat pump optimization: how the system works
The Powerwall asks the heat pump to boost heating, and the heat goes into a hot water or buffer tank. That is the storage the source describes. It is not the building’s structure. Owners outside Europe, including in North America, should check whether the feature has reached their market.
Heating is one of the biggest energy costs in many homes. Electrek’s worked example gives an illustration only: a 300-litre tank heated by 30°C holds about 10.5 kWh of heat. It needs roughly 3.5 kWh of electricity at a coefficient of performance of 3.
Does the feature need an installer? Yes. The Powerwall connects to the heat pump by physical wiring, which a Tesla-certified installer must install and commission.
Check the Tesla app for version 4.59.1 or later and firmware 26.26 or later. Ask your installer about the wiring before the cold weather starts.
