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Showing results for tags 'battery monitor shunt'.
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Hello Dear boating friends, Well I am in the middle of a re-fit of my engine bay. Part of that involves all new batteries / cables / isolators and shunt. I decided to use bus bars this time to make things neater. The previous setup also had a shunt on the negative side with ALL appliances on the load side of the shunt. Meant it was nearly at the end of the threads and looked messy, although it did work quite well. So now I have bus bars, that has introduced a complication which I just cannot get my head around. Realised wherever I put the shunt, either behind or in front of the neg bus bar there are scenarios where it won’t be recording the total number of amps of all systems. This breaks Peukert's equasion which of course depends on knowing complete amps in / amps out. This article kind of explains it: https://www.coastalclimatecontrol.com/index.php/blog/139-battery-monitor-doesn-t-show-solar,-wind,-or-hydro-output.html and suggests two shunts. I have the Victron 702 which is a single shunt solution. If I put the shunt behind a bus bar straight after the battery and then the MPPT and Alternator could be feeding the inverter and circumventing the shunt. Fine if they are charging batts, shunt will read, but if they are feeding inverter then won’t go via shunt. If you put the shunt after the bus bar, the you get the opposite problem. The MPPT or Alternator could be charging the batteries and this would circumvent the shunt. If the inverter were to be drawing the it would go via the shunt. Both situations totally negate the point of a shunt. Any tips or thoughts very much valued
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- victon battery monitor
- battery monitor shunt
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