Narada Power Source Co., Ltd. 12REXC operation manual V1.0
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3 Charging current limited: 0.05C
10
A;
4 Cut-off condition: the charging current is less than 0.005C
10
with another
extended 3 hours or charging time reached 24 hours (alternative);
Recharging procedure
1
Connect the batteries in series with cables or copper bars, and make sure that all
the screws tightened with each joint, then connect the anode of battery group to the
anode of charging equipment (charger), and the cathode of battery group to the
cathode of charger.
Pay attention: A breaker or fuse should be connected in the circuit in order to
protect the batteries and charger, the capacity of breaker or fuse should be 1.5
times of circuit maximum current.
2
Turn on the charger, set the charging voltage and current according to 4.1
recharging parameter.
3
Turn the breaker or fuse, and then turn on the charger to recharging batteries.
4
Stop charging when reaching the cut-off condition. At the last one hour before
finishing, test the battery voltage one by one, the battery which voltage is below
2.16V/cell should be dealt with the method in chapter 3.3, if that battery can not
accord with the requirement, it should be rejected.
Cycle procedure
We can use the method as below to recharge the batteries after long time storage
(for example: more than 1 year):
First connect the batteries in series to the charger, discharge batteries with constant
current 0.25C
10
(A) for about 3 hours. Then use the method above to charge the
batteries. Stop charging when reach the cut-off condition.
If the capacity still can not be renewed by this method, this means the batteries fail
because of long time storage or other reasons.
4.4 Maintenance of wind/solar generating energy storage system
It is necessary to recharge one time every two months for maintenance because of the
under-filling state of the batteries used in home energy storage system and wind/solar
generating energy storage system. The battery maintenance method can operate as
below:
In the case of mains supply, the maintenance and battery recharge methods be the same
as clause 4.1.
