I have my IoTawatt all set up and things seem to be working well. I am in Australia with 3 Phase Power. I am using the derived method for my power. However, my problem lies with the power readings compared to my power meter and solar inverter. Looking at kWh generated, i find that i need to multiply the reading from IoTaWatt for my Solar by 1.79 in order to get within 0.05kWh of the correct reading from the inverter. From my power meter, I have found I need to multiply the IoTaWatt reading by approx 1.65 to get in the correct range. I’ve monitored these values for a few days now and multiplying by these values gets as close to what the actual reading so i am happy.
However, this tells me that I have probably set something up incorrectly with IoTaWatt but I dont know what it is. To confirm, yes I have checked the VT and it is set up correctly I am using the MP-3027. I am using the ECS16100 on my main power supply and the ECS1050 on my other circuits.
Hopefully someone can help me figure out where I have gone wrong.