Can someone recomend a high Amp, energy monitor?

Hardware
1

Just watched a great video from Rob on the hookup about how to save energy on water heaters. I don’t live in the US, but we have a “boiling water tap” and I’m wondering how much energy it uses and if it’s a lot, use a similar setup to what Rob recommends to switch it off and on.

But given that the specification reads “220—240 volts, 1300 watts, 5.7 amps” I don’t believe a standard ZigBee plug (I have a few Innr ones) should be used.

How would this forum go about monitoring the energy consumption of this water heater over time (day, week, month)? I would like to keep it simple as whatever I build or buy may be moved to other devices in the house to check out what they use.

2

keep in mind the energy needed to heat up the boiler content. For example, Quooker says to only turn it off if it’s for more then 2 days.

3

I would suggest either Sonoff POW R2 (15A) or Sonoff POW R3 (25A). I have both, flushed with Tasmota 11, and looking at using one to control the hot water immersion. Just sourcing some thermostats to have extra inputs to optimse the untilistation.

4

Thanks both and @niro1987 - that’s a good point.
@RZIRE - I would like to figure out first how much it uses to see if it’s worth it but then the Sonoff is obviously a good option

5

I use wifi ShellyEM, it a clamp meter. (incidentally same integration as the Shelly power switch wifi modules that shown in Rob’s video, i also have a few of those, all work flawless for years). It also have a built in contact 2A switch to use for switching a relay to turn on and off your water heater.

6

That clamp looks cool but seems out of stock :frowning: Any other suggestions?