So this is a snap shot of two RVs sitting with no shore power. Any ideas why one would read a positive DC figure and the other a negative? Just using roof top solar of power…?
Have a read of this FAQ on this very topic. This is in a sticky post at the top of the DIY topics.
This explains how the DC box figures are calculated and how they can be in error if you are not using a SmartShunt as a DC energy meter on your DC loads. Therefore, on the second image you either have a small charger active that is not directly measured or you have a calibration error on one of your other measured powers, battery meter, inverter or MPPT.
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