I'd like to get the extra 2nd decimal place on the voltage reading of a Trimetric battery monitor, like the Victron monitor supplies. The special Victron shunt with PC board is incompatible with the exposed underneath battery location of our Travato 59K. To provide 2 decimal places the Trimetric requires a 100A/100mv shunt, rather than a 500A/50mv shunt.
I calculate our usage/load wouldn't exceed 55A in the most unlikely situation. But do I have to consider current sources as well as loads? Solar and AC charger provide under 50A, but what about the alternator? The Travato has a 180A alternator. Is a 100A shunt too small, because current sources are in play, too?
link to Borgart shunt pdf
Bogart says the ratio is what matters, and suggests using a 200A/200mv, or 300A/300mv shunt to get 2 decimal places. Does anyone know where would I could buy one?