I have a few Sonoff basic and just bought a new Sonof POW. There is no power on state select for Sonoff POW as there is for Sonoff basic. I want to make sure that my Sonoff POW is always on when it is powered again after a power cut. Any idea what should I do?
New firmware release for Pow R2 but it fails all the time to upgrade after downloading until 90%
Please return the modes of controlling the state of the load-sensing relay to the old behavior:
Previously stored status (when the power is applied to the device, the relay must be in the state that was before the power loss)
In general, for such devices it is desirable to make a galvanic isolation to measure the power consumption through the current transformer. Then you can not be afraid that the device will burn .... This also applies to the built-in relay, large currents DANGER to commute those relays that are installed. Example see in my photos ....
Hello , Bert !
A'm owner of EV CAR ( Nissan Leaf ) and use POW as charging meter & control . Last device (POW) burned while charge car ...... At this time use DIY control box (ESP32 + GSM modem) .... & write software for it
Best regards !
I'm thinking of using just a normal Sonoff (not POW) which then switches a proper 20A industrial contactor. In this case the Sonoff has no load other than the contactor (<1W). I can still read the kWh at the charging station, so not too much of a loss.
I usually top up the car with 6A over night which is fine for the Sonoff POW and use the 15A charging only when I'm around. The Sonoff gets pretty warm especially here in Australian summer with max load on it, so not a big fan of that...
I'm use at 10A max power for charging .
Does the device measure the power if an external contactor is used? In theory, it measures only the current passing through it. In your case, all the load goes through an external relay ....
Bert , please for contact email : firstname.lastname@example.org . More info about EV car/charger/ets
(I'm from Belarus . Minsk city )
Yes, you're right, the Sonoff will not show the charging power anymore. At least it is safe to operate and won't start a fire eventually. That's why I will replace it with a non-POW Sonoff.
Got a YouTube Channel about the EV, its problems, challenges and fun: https://youtube.com/unpluggedev
I'll text you soon. Cheers.
Also need the Power State ON option. I have POW R2, but the firmware 1.1.0