Could you guys help me out with a question about shutoff switches?
So I'm wiring up my 30A DC-DC/MPPT and I have a shutoff switch on the PV (+) cable between the solar panel and the charger.
My house battery bank is wired to a (+) bus bar, and I also have a shutoff switch between these two.
Should I also have a shutoff switch between the starter battery and the DC-DC/MPPT unit?
I'm thinking that if I want to remove all power from the system to work on it, there could still be a possibility of power coming through from the starter battery if I don't have a switch here.
Am I thinking correctly here?
The (+) output on the DC-DC/MPPT unit is also wired to the (+) bus bar, so would it make sense to just have one shutoff switch between the charger and bus bar and get rid of the one between the solar panel and charger? If I had this switch, I could turn it off along with the house battery switch to remove power from everything that runs off the bus bar, but I would still have power to the PV (+) and battery inputs on the charger. This doesn't sound like what I want.
Any thoughts?