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...
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Almot wrote:I think your understanding about the stages of charging is correct. Since UPG offers a setpoint of 14.7v when the battery is being used and a standby voltage of 13.6v, I believe those would be good starting points.smkettner wrote:
AFAIK the Rogue will hold voltage until amps drop to the set point then go to float.
Or if the current won't drop due to loads, it will go to float when timer expires.If something is turned on, the controller will provide the power to maintain the voltage. Voltage will only sag if the demand exceeds the solar energy available.
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.
You might be changing the charging regimen when you have everything in use to get fast enough recovery or more a more battery-friendly charging scheme. Part of the problem with variability, knowing where perfect center is and changing things from that. I've found that my AGM's are very forgiving of different charging schemes, if charging time is available, they get back to 100%SOC irregardless of a couple of 0.1 V.
