My solar controller reads the batteries at 14.3v and goes into absorption while the smart shunt says 13.5v and at 83%. The solar controller is at the back of the boat while the smart shunt is right next to the batteries. Do I need to bring the solar controller next to the smart shunt to fix this as by the end of the day I am only getting the batteries charged to about 89%.
Whats happening is that when the solar is charging you are getting a voltage drop on the cable from the reg to the battery.
Best solution is to move the Regulator to be as close to the battery as you can get it. and make sure the wires gfoing from the reg to the battery are at least 6mm
Hi @oxdavey
You could network them, so the mppt can use the V from the shunt rather than it's own. You have a Cerbo (two?), so if they're connected there you can use DVCC to network the V. If not Cerbo connected, then maybe via bluetooth, although range may be an issue. Don't use both together.
But yeh, normally it's better to run the solar wires the distance as they're at a higher V, and have the mppt nearby the batts and the other elec kit.
