Charging Algorithms (Formulas; Battery Type; Charge Algorithm Stages; Three-Stage Charging - Xantrex MS2000 Operation Manual

Battery Charging Reference for the Main Charger

Charging Algorithms (Formulas)

Battery Type

Flooded (or wet)
Gel
AGM
Custom

Charge Algorithm Stages

Three-stage charging

B–2
MS2000 charges flooded (or wet) lead-acid, gel, AGM (absorbed glass mat), and
custom batteries.
Flooded (or wet) batteries have removable battery caps for refilling with distilled
water and testing the electrolyte.
Gel batteries have the electrolyte in the form of a gel rather than a liquid and do
not require topping up. Gel batteries are sealed and the battery caps are not
removable.
AGM (absorbed glass mat) batteries are similar to gel batteries except that the
electrolyte is absorbed into a fiberglass matting.
Custom is configured by the dealer, factory, or service center for battery types
other than those listed above.
WARNING: Risk of battery damage
Since the MS2000 has only one battery type setting for all batteries connected to
its bank, do not mix battery types. All connected batteries should be of one kind:
Flooded (or wet) or Gel or AGM or Custom.
If three-stage charging is enabled, the MS2000 will charge batteries in a sequence
known as three-stage charging. The charging voltage delivered to the battery
depends on the battery:
• type setting
• temperature (by switch setting or battery temperature sensor)
• state of charge
The three automatic stages are:
• bulk
• absorption
• float
See Figure B-1 for a graph of the three-stage charging profile.
There is a fourth stage, equalization, which is initialized manually as it is only
performed occasionally and only on flooded (or wet) batteries.
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