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I have 8x 12V Rolls S12 230AGM-RE in two 48V strings charged by 6x300W PV panels via EasySolar 48/5000.
The Victron Connect App factory Preset 2 seems fine except for the Absorb Voltage 14.4/57.6 whereas the Rolls user guide gives 14.7/58.8. (Float is same as the Victron Preset 2)
Should I edit the Preset 2 Absorb Voltage to 58.8 or use the Spiral AGM preset?
Is the higher Absorb setting necessary?
Is the Rolls S12 series a spiral AGM?
Thank you.
Best to go to user defined and set the Rolls specified values there.
Rolls technical services says me that is mandatory to use 14.7v abs voltage and a fixed abs time with their formula 0.38*(capacity /charge current) in hours.
Or a end tail current of 2%, but only after one hour the tail current drop below 2% of capacity.
Rolls agm have a especially thick plates. More like spiral agm, but they are not spiral.
Common standard agm like victronenergy deep cycle have thinner plates respect to rolls agm.
