Battery Charging Reference for the Main Char g er
B–2975-0125-02-01
Charging Algorithms (Formulas)

Battery Type

MS2000 charges flooded (or wet) lead-acid, gel, AGM (absorbed glass mat), and
custom batteries.
Flooded (or wet) Flooded (or wet) batteries have removable battery caps for refilling with distilled
water and testing the electrolyte.
Gel 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 AGM (absorbed glass mat) batteri es are similar to gel batteries except that the
electrolyte is absorbed into a fiberglass matting.
Custom Custom is configured by the dealer, factory, or service center for battery types
other than those listed above.
Charge Algorithm Stages

Three-stage charging

If three-stage charging is enabled, the MS2000 will charge batteries in a seque nce
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 grap h of the three-stage char ging profile.
There is a fourth stage, equalization, which is initialized manually as it is only
performed occasionally and only on flooded (or wet) batteries.

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 connecte d batteries should be of one kind:
Flooded (or wet) or Gel or AGM or Custom.