Hello. Can you recommend specific devices for controlling and power monitoring 2,5kW water boiler please? As I understand from this video, I should use 3 devices. 1x relay to control 1x contactor and after that 1x some PM device?
When using a contactor with any Shelly PM, the power measurement is lost, I thought this is worth mentioning, it will measure the power drawn bij the contactor, not the actual load.
Also, you should use a snubber when pairing a contactor with a Shelly relay that has power measurement. I probably should have noted that it really only makes sense to use a contactor with a Shelly that has dry contacts. I'll include that in an upcoming video
Just need to give a follow up here. Starting with Gen3, shelly "PM" products no longer need a snubber. In addition to PCB and design changes, on the software side, the relays will switch when the sine wave is crossing zero. This is an underappreciated feature in the platform that I am head over heels about!
I’ve been waiting for this video! These videos are so helpful. Please keep them coming. Thank you from Australia.
You got it!
Hello. Can you recommend specific devices for controlling and power monitoring 2,5kW water boiler please? As I understand from this video, I should use 3 devices. 1x relay to control 1x contactor and after that 1x some PM device?
Ive got a 1PM, on the contactor, I see A1 goes to O on the shelly, would A2 goto the N on the shelly?
Yes that's correct. If the video was panned out you would see that white neutral wire coming from N on the Shelly and wired to A2 on the contactor.
Hey Doug!!!
Hello!
Cool video, keep them coming!
Will do!
When using a contactor with any Shelly PM, the power measurement is lost, I thought this is worth mentioning, it will measure the power drawn bij the contactor, not the actual load.
Also, you should use a snubber when pairing a contactor with a Shelly relay that has power measurement. I probably should have noted that it really only makes sense to use a contactor with a Shelly that has dry contacts. I'll include that in an upcoming video
Great work Doug!
Just need to give a follow up here. Starting with Gen3, shelly "PM" products no longer need a snubber. In addition to PCB and design changes, on the software side, the relays will switch when the sine wave is crossing zero. This is an underappreciated feature in the platform that I am head over heels about!