I just enabled Home Assistant to interogate the devices and I am finding calcaultion errors for Watts.

Home assistant can interrogate the P110 and display the following:

• Voltage (Vrms)
• Current (Irms)
• Watts (W) then
• Energy (kWh)

The results have not been very gratifying;

When the device is interrogating all three parameters at the same time;

The wattage result can be half the calcualted result.

I noticed on the website for specifications that there are no accuracies supplied for the measurements.

I have downloaded the data from home assistant and put into excel files with time stamps.

I cannot attach as this forum will only allow 1 file

Can you confirm the methodolgy for the power calculations?

The next step is to use the voltmer and ammeter to verify