Got two Shelly 1PM, flashed with tasmota, calibrated on 60W bulb, everything works.
Week ago attached one to air conditioner which uses 1500W (7A):
when off shelly temperature is 50-60c at 25c room temp
when on shelly temperature gets to 75c after an hour and then heating cycle ends so shelly cools
seems bit high but as long as it gets to 75c max I’m ok with it.
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Now attached one to water heater which uses 2600W (12A):
when off shelly temperature is 50-60c at 25c room temp
when on shelly temperature gets to 90c after 20 minutes and turns off by itself.
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I’m using them only for monitoring power consumption not for controlling devices.
Wired them both according to shelly instruction like this:
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What could it be source heating problem? 12A should be ok on 16A switch