I have a Victron 100/30 smart mppt charger on a 400 watt system feeding a 200ah LifePo4 battery. The last few charge cycles the float voltage (set at 13.5 volts) is truncated and drops below float after 2 hours. Full sunshine and good current should maintain float during sunsine hours. Correct? No clouds in the sky during this phenomena. Any good thoughts on why this occurs?
Also details of your pv array and system.
System charger is the Victron 100/30 smart mppt, I feed a 200ah lifepo4 battery. One repetitive load for dc fridge, lights, ceiling fan and assundry low current loads. Battery rarely discharges below 90% SOC.
@OrvH all looks good up until 14:39.
Perhaps shade / shadow is reducing pv output? Shade on a series string is bad.
Maybe fire up Victron Connect "trends" and monitor the pv voltage and current to see what is happening.
Yep, after additional review, solar voltage dipped from 39.3 to 25.9 at the same time float stopped. Pv volts never went back to upper level and current flow dropped continuously. It must have been a shadow- i hope. Will follow today. Note rebulk attained a couple hours later.
So, if voltage falls quickly and substantially, the MPPT Charger can not maintan float setpoint due to low current input, especially if loads are present. Thank you!
