Grounding an MPPT controller
Hello, I'm in the process of installing solar for our 1181 Camper (2010). I'm using a Victron 100/30 MPPT controller along with the Victron BMV-712 monitor & shunt. We have 2 LifePo4 100ah batterie...
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I would connect solar controllers ground to the RV frame,
If I bothered to connect it at all,
I would Not connect it to battery shunt
Ground in this case is for lighting protection and would goto earth ground when used in a stick house install, it does NOT equate to battery negative that everybody likes to call ground, but is really the common return for Current flow,
Solar controllers often use the negative terminal as the switched 'charging control' and the positive as the common,
Incidentally IIRC
The Earth is actually positive charged and the clouds are negative (Static charge from atmospheric friction)
Some early automobiles used positive as common to the frame (aka ground) and Negative as the Hot wiring, which is more electrically correct, as electricity aka ELECTRONS travel from Negative to positive, Not positive to negative,
But of course obstinate USA engineers had too do things different than Britton and Europe, so we use a system that have people thinking backwards, and more galvanic corrosion at body parts and electrical connections than would happen if car body frame were at positive potential instead of negative potential
Whoops....according to NOAA I got sky and earth potentials reversed, sky/clouds are positive and earth is negative
So much for My old memory
If I bothered to connect it at all,
I would Not connect it to battery shunt
Ground in this case is for lighting protection and would goto earth ground when used in a stick house install, it does NOT equate to battery negative that everybody likes to call ground, but is really the common return for Current flow,
Solar controllers often use the negative terminal as the switched 'charging control' and the positive as the common,
Incidentally IIRC
The Earth is actually positive charged and the clouds are negative (Static charge from atmospheric friction)
Some early automobiles used positive as common to the frame (aka ground) and Negative as the Hot wiring, which is more electrically correct, as electricity aka ELECTRONS travel from Negative to positive, Not positive to negative,
But of course obstinate USA engineers had too do things different than Britton and Europe, so we use a system that have people thinking backwards, and more galvanic corrosion at body parts and electrical connections than would happen if car body frame were at positive potential instead of negative potential
Whoops....according to NOAA I got sky and earth potentials reversed, sky/clouds are positive and earth is negative
So much for My old memory
