Been having two issues with my new Emonpi regarding inaccurate energy usage.
CT2 PV side is reading 50W when sun is down and no solar is being produced, tried adjusting scale and 0 is only way to get it to 0 but then when solar is generated it still shows 0.
Been monitoring energy usage last couple weeks and looked very high from manual calculating by counting all my devices that is switched on to compare and seem to be where i actually use approximately 300W emonpi will report 400-450W so i got hold of a high quality Fluke clamp meter to get more accurate figures and this is what i got. Voltage stay stable at 245V when I have immersion hot water on so used this as a base and this seems accurate compered with emonpi vrms reading.
1.10A 244V 268W 347W
0.34A 245V 83W 243W
0.10A 245V 24W 64W
0.24A 245V 58W 110W
13.2A 243V 3200W 3370W
So after reading up about calibrating using scale under emonhub I used immersion heater again and calibrated emonpi with about a change from 1 to about 0.8 under emonhub and all this worked great and got the correct figures but then i would switch hot water off the lower average consumption will be completely out.
Any advice would be greatly appreciated.