Section 6 - Samlexpower Evolution EVO-2212 Owner's Manual

SECTIOn 5 |
The battery Charger Section of the EVO is a powerful, 100 Mhz DSP micro-controller based, 3
Stage or a 4 Stage Charger. battery charging parameters are detailed at Table 6.2.
3 Stage Charging Algorithm (Default) is used for normal day to day charging. The 3 stages are
– bulk, Absorption and float. The charging voltages and currents are programmable within the
ranges given in Table 6.2 to take care of a wide range of battery types like flooded, AGM, Gel
Cell, Lead Calcium etc. for details, see Section 5.6 and Charging Curves at fig 6.2.
4 Stage Charging Algorithm is used in the Equalization Mode. Equalization Mode is selected
using optional remote Control EVO-rC (see Appendix A). This mode is used only for flooded
or Wet Cell batteries. The 4 stages will be - bulk, Absorption, Equalization and float. for details,
see Section 6.2 and Charging Curves at fig 5.2. Equalization Mode is desirable for the proper
health of Wet Cell batteries. Equalization voltage is programmable. Equalization current and
Equalization time are computed automatically. Please see Table 6.2 for details.
5.2 DynAmic inPut Power DiverSion control of bAttery
chArging current
In Charging Mode, the net AC input current from the Grid / Generator is the sum of the AC
side charging current and the pass through load current. based on the rated capacity of the
Grid branch Circuit / Generator, the net AC input current will be required to be limited to
prevent overloading of the Grid branch Circuit / Generator (Please see Table 3.2.2 for details).
EVO Series has a very powerful battery charger that will require a proportionate higher AC input
current from the Grid/Generator. The Grid branch Circuit/Generator will also be required to
provide current to the AC loads. With the optional remote Control Model EVO-rC, the desired
value of input current from Grid/Generator can be programmed (See Appendix A under Section
4.5 for Input Settings -"GrID MAX CurrENT" and "GEN MAX CurrENT". Default is 30A).
The EVO will automatically reduce charging current to support the AC loads on priority and use
whatever is extra for charging. This will prevent overloading of the Grid branch Circuit/Generator.
5.3 ADAPtive chArging control for comPlete chArging AnD
Prevention of over chArging / boiling of bAtterieS
An automatic Adaptive Charging Algorithm is used to ensure that the battery is completely
charged in a safe manner for longer battery life. In this algorithm, the time the battery remains
in Absorption and Equalization Stages is proportional to the time the battery remains in the
bulk Charge Stage. A battery that is deeply discharged will remain in bulk Stage for a longer
duration and will require longer time in the Absorption and Equalization Stages for complete
charging. On the other hand, a battery that is almost completely charged will remain in the
bulk Stage for a shorter duration and consequently, will remain in Absorption and Equalization
stages for a shorter duration. This will prevent overcharging / boiling of the battery.
note: in other inverter chargers that execute Absorption and equalization Stages for
a fixed time of 4 to 8 hours, a nearly fully charged battery may overcharge / boil and
hence, will reduce battery life.
5.4 PArAllel chArging of bAtterieS through eXternAl
chArger
The battery Charger Section is able to operate in parallel with another external charging source
like Solar Charge Controller / AC Charger of up to 50A capacity. The output of the external
charging source is routed through the unit (Connectors 3, 4 in fig 2.1). Maximum charging
74 | SAMLEX AMErICA INC.
Battery Charging in Evolution Series