I want to use the shelly em to measure the power of 2 heaters. I know it's not normally a problem.
But the heaters will be powered by off-grid photovoltaic panels through a special inverter.
And in the output first, I will have a modified sine wave. And the voltage will vary from 120V to 230V.
Everything will depend on the sun.
Can shelly measure such parameters for me?
