AGM battery setpoints?
Now that I have this nice fully adjustable Rogue MPPT 3048 I suddenly realized that I don't know battery setpoints - Absorb V, Float V and Full I (charging current at SOC 100). Alright, current in...
Forum Discussion
Almot wrote:
This is not clear to me. Rogue will revert to previous mode when it sags more than 0.5V. Otherwise it will remain in ABS until timer expires, and then will go to Float - but the current is high so it will go back to higher voltage of ABS (and will reset the timer as it does every time it enters ABS)? Or what? Need to ask Marc at the Rogue.
If the controller is in absorb and isn't able to maintain the battery voltage at the absorb setpoint by at least 0.2v, then it will revert to MPPT. Otherwise, it will eventually transition to float if either the current setpoint is met or the absorb timer expires.
If you're supplying a heavy load when the absorb -> float transition takes place, the controller will keep supplying the load and should stay in float. If it was able to keep up with the load at the moment of transition, then it should have no trouble after the transition takes place.
BTW, the 0.5v figure was for an older pre-production firmware version, which just happened to get printed in the manual (the newer version online corrects it). All of the controllers in production have newer firmware which sets the threshold at 0.2v. There is also a delay before mode transitions take place, so that transient sags in battery voltage don't trigger a reversion back to MPPT.
