What is the cause of getting a negative reading for the active power (W) in powerlogic PM21000, and how i can to change the mode from export to import

[Charles_Murison · Accepted solution]

Hello @bada ,

There could be many reasons why you are seeing negative power. The most common reason is CTs are installed backwards, the next most common reason is the CTs and voltage connections are not on the same phase. Example: A phase voltage however B phase CT.

Suggest looking at the phase angles between voltage and current to determine if you have a wiring issue.

Regards,

Charles