Shelly EM power spikes

Hello

I have 10 tasmota plugs and one boiler switch to measure consumption of everything, now bought Shelly EM with two clamps and measures are same: connected one clamp before main breaker and one clamp after main breaker

Shelly shows power spikes of 1-2 kW but none of tasmota or boiler switch see those spikes

Shelly shows power spikes on original firmware so I tried tasmota and still spikes present so I reverted to original firmware

Top is shelly bottom are tasmota plugs and boiler switch

power.PNG

I wonder if those spikes are real or shelly misreads and if they are real where is this going to?

Thanks

Zitat

According to the attached graph, it appears that the device connected to the "Plug Kitchen 5 ENERGY Power" causes jumps that are seen in the upper graph, they have the same pattern.

Yes I see it now

Plug kitchen 5 is refrigirator, when cooling it draws about 80-100 watt

Meaning every time cooling cycle starts it spikes to 1-2kW and tasmota plugs doesn't see it

Thank you