SamplexPower Evolution Series Owner's Manual page 70

SECTIOn 5 |
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 uSing eXternAL ChArger
The batteries feeding the EVO
Output of the external charger is fed to the input terminals marked "EXT Charger" (3,4 in fig
2.1). Maximum charging current on these terminals is to be limited to 50A. this limit
should not be exceeded!
The charging current received from the external charger is directly fed to the battery terminals
(1,2 in fig 2.1) through a series connected Hall-effect Current Sensing IC with integrated shunt.
The value of this current is displayed under "bAT EXT" on the optional remote Control EVO-rC
(Please see display screen in Section 3, fig 3.2 in the attached Owner's Manual for EVO-rC: (i)
row – Screen No. 9; Column – Group 2 and (ii) row – Screen No. 16; Column – Group 3)
The net bulk Charging Current fed to the battery bank will, thus, be as follows:
• N et Bulk Charging Current fed to the battery bank= Adjusted Bulk Charging Current from
the internal battery Charging Section + Current available from the external charger
Normally, Lead Acid batteries should not be charged at very high bulk Charging Current as this
will damage the batteries due to overheating and cell degradation. Normal bulk Charging Cur-
rent is in the range of 10% to 20% of the Ah capacity of the battery bank at C/20 Discharge
rate. Check with the battery manufacturer regarding recommended bulk Charging Current for
your battery bank. This value of "bulk Charging Current" should be programmed as "bULK
CUrrENT" using the optional remote Control EVO-rC (refer to Section 4.4 and Table 4.4 in
the attached Owner's Manual for EVO-rC at Appendix A)
The measured value of the charging current received from the external Solar Charge Control-
ler is monitored by the control circuitry of the internal battery Charging Section. The amount
of bulk Charging Current produced by the internal battery Charging Section is adjusted in real
time to satisfy the following condition:
• I nternal Bulk Charging Current = Programmed Value of "bULK CUrrENT" – External
Charging Current
for example, if the "bULK CUrrENT" in the EVO
nal charger is generating 15A, the internal battery Charging Section will reduce its current
from 40A to 25A so that the net charging current is equal to the programmed value of 40A
In other Inverter Chargers where this design feature is not available and the bulk Charging
Current of the internal battery Charger Section is fixed, the batteries are likely to be charged at
high bulk Charging Current = fixed value of bulk Charging Current from the internal battery
Charging Section + Current available from the external charger.
!
CAution!
Ensure that charging parameters like Absorption, float and Equalization Voltages and Tempera-
ture Compensation of the external charger are set / programmed to match the programmed /
default parameters of the internal battery Charger Section of EVO
being used (Please refer to (i) Section 6, Table 6.2 and (ii) Section 4.4, Table 4.4 of the Owner's
Manual for remote Control EVO-rC at Appendix A).
70 | SAMLEX AMErICA INC.
Battery Charging in Evolution
can also be charged using appropriately sized external charger.
TM
Series
TM
is programmed at say 40A and the exter-
TM
based on the battery bank
TM