Equalisation - Victron energy MultiPlus-II GX Manual

This is the recommended charge algorithm for lead acid batteries. See the help files in the software configuration programs for
other features.
Battery type
The standard setting is the most suitable for Victron Gel Deep Discharge, Gel Exide A200, and tubular plate stationary batteries
(OPzS). This setting can also be used for many other batteries: e.g. Victron AGM Deep Discharge and other AGM batteries, and
many types of flat-plate flooded batteries.
With VEConfigure the charge algorithm can be adjusted to charge any battery type (Nickel Cadmium batteries, Lithium-ion batter-
ies)
Absorption time
In case of the standard setting 'Four-stage adaptive with BatterySafe mode' the absortion time depends on the bulk time (adaptive
charge curve), so that the battery is optimally charged.

10.2.1. Equalisation

Traction batteries require regular additional charging. In the equalisation mode, the product will charge with increased voltage for
one hour (4V for a 48V battery). The charging current is then limited to 1/4 of the set value.
Equalisation mode supplies a higher charging voltage than most DC consuming devices can cope with. These devices must be disconnected before additional charg-
ing takes place.
Automatic equalisation charging
This setting is intended for flooded tubular plate traction or OPzS batteries. During absorption the voltage limit increases to 2,83V/
cell (68V for a 48V battery) once the charge current has tapered down to less than 10% of the set maximum current.
See 'tubular plate traction battery charge curve' in VEConfigure.
Storage voltage, Repeated Absorption Time, Absorption Repeat Interval
See Appendix E.
Bulk Protection
When this setting is 'on', the bulk charging time is limited to 10 hours. A longer charging time could indicate a system error (e.g. a
battery cell short-circuit).
AC input current limit
These are the current limit settings for which PowerControl and PowerAssist come into operation.
PowerAssist setting range, grid in-line topology
PowerAssist setting range, grid parallel topology with external current transformer
UPS feature
If this setting is 'on' and AC on the input fails, the product switches to inverter operation practically without interruption.
The output voltage of some small generator sets is too unstable and distorted for using this setting – the product would continually
switch to inverter operation. For this reason, the setting can be turned off. The product will then respond less quickly to AC input
voltage deviations. The switchover time to inverter operation is consequently slightly longer, but most equipment (most comput-
ers, clocks or household equipment) is not adversely impacted.
Recommendation: Turn the UPS feature off if the product fails to synchronise, or continually switches back to inverter operation.
Dynamic current limiter
Intended for generators, the AC voltage being generated by means of a static inverter (so-called 'inverter' generators). In these
generators, engine rpm is reduced in case of low load: this reduces noise, fuel consumption and pollution. A disadvantage is that
the output voltage will drop severely or even completely fail in the event of a sudden load increase. More load can only be sup-
plied after the engine is up to speed.
If this setting is 'on', the device will start supplying extra power at a low generator output level and gradually allow the generator to
supply more, until the set current limit is reached. This allows the generator engine to get up to speed.
This setting is also often used for 'classical' generators that respond slowly to sudden load variation.
Weak AC
MultiPlus-II GX
24/3000/70-32 GX 48/5000/70-50 GX
48/3000/35-32 GX
4 A – 32 A
4 A – 50 A 6 A – 100 A
20
6 A – 50 A