FoxenTec
Senior Member
I would like to use my solar panel to essentially feed two MPPT Controllers (only one active at a time), each with their own set of batteries wired in parallel. Truck Camper has batteries in the shell and we also have batteries in the trailer we tow.
In order to do this, I have the pos. from the solar panel connected to a Blue Sea 3 Position Switch. One side connected to the Solar Panel for input, one side facing the tow vehicles MPPT Controller and one side facing the MPPT Controller located in the trailer I am towing. (long story but I could not install solar panels on the trailer)
I was thinking this will work since only ONE MPPT will receive solar power at a time. The switch will either be OFF, MPPT-1 or MPPT-2.
The question I have is can I tie all the NEG. cables down to a common negative bus as shown in my diagram. Essentially the Solar Panel Neg., MPPT-1 Neg. and the MPPT-2 Neg. will all be on the same bus.
(on a side note, the batteries in the shell of the tow vehicle are not chassis grounded but the batteries in the trailer are grounded to the trailer chassis)
In order to do this, I have the pos. from the solar panel connected to a Blue Sea 3 Position Switch. One side connected to the Solar Panel for input, one side facing the tow vehicles MPPT Controller and one side facing the MPPT Controller located in the trailer I am towing. (long story but I could not install solar panels on the trailer)
I was thinking this will work since only ONE MPPT will receive solar power at a time. The switch will either be OFF, MPPT-1 or MPPT-2.
The question I have is can I tie all the NEG. cables down to a common negative bus as shown in my diagram. Essentially the Solar Panel Neg., MPPT-1 Neg. and the MPPT-2 Neg. will all be on the same bus.
(on a side note, the batteries in the shell of the tow vehicle are not chassis grounded but the batteries in the trailer are grounded to the trailer chassis)