I have a water heat pump on phase 3. It consumes 500W with power factor of 0.8 inductive. A 1uf capacitor over phase3 should correct the power factor. I can switch the cap in with the em3 relay.
There is no message "power factor bad" from the shelly, so i might use "power over 400W" to switch the relay since there is not other big load on the phase.
Good idea or not?
