Power factor low at night

I'm using a Shelly 3EM (**Mod Edit**) Shelly 3EM-63W Gen 3 to measure my PV solar panel energy. During the day this seems to work well, if the sun shines, it gives me a high incoming power, if a cloud appears, it shows less power, so far so good. However, at evening and night there is power reported by the different phases, reaching powers of 1kW. During the evening and night there is also a low power factor for each phase. Seems that once there isn't a lot of solar, the system reports rubbish. I made sure that the clamps are mounted correctly and this also shows with a clear power factor of 0.99 or 1 during the day. I'm afraid it might be interference from the breaker box but want to make sure I'm not overlooking anything. Any ideas?

Hi,

Thank you for your response. As I have the Shelly 3EM 63 Gen 3 and the Va, Vb, Vc wires are connected correctly, I believe this should already be correct since the Va cable is put into the same 'hole' as the cable the clamp sits around, right?

The W type.

Posted in the 3EM category since there is no 3EM-63 (non pro) category.