So I have completed my install of my solar system on my RV, and so far everything seems to work but I have found I think 1 issue. When I connect to shore power, whether its a generator or 15/30 amp service I get a negative watts displayed when there is no load applied. When I apply a load, AC or microwave, I get a positive Watts reading. Have a missed a step somewhere. In the second photo I have shut off the solar. Here is my solar setup
Multiplus ii
150/60 MPPT
500a smart shunt
Power Inn
Cerbo
2 200 watt solar panels
2 195 watt solar panels
Panels are connected in series/Parallel
Small power readings on active but unloaded AC inputs or outputs are common. These are caused by small reactive currents, or other offsets in the current measuring system. These can be safely ignored.
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As it is a mobile system you should have left your grid code as “None” on your Multiplus, you do not set a grid code for mobile applications.
Thanks for the advice. changes made
Hi , i am having the same issue with the negative reading in the shore side when there is no load.
i have read your post on this and my question is how do i get to the grid code and choose none. this just happened about a month ago, it has worked for 2 years with no problem until now. any help is much appreciated. thanks so much. i have a multiplus-2 12/3000 120/50 2x120
Grid code requires a password, we will not give it here. You should contact your seller / dealer for this password.