8
When the controller operates under “Condition 1”or“Condition 2”, it will carry out the charging as
per the actual current or power; at this time, the controller can work at the maximum power point of
PV array.
When the power of PV is not greater than the rated charging power, but the
maximum open-circuit voltage of PV array is more than
60V(XTRA**06N)/100V(XTRA**10N)/150V(XTRA**15N) (at the lowest
environmental temperature), the controller may be damaged.
Condition 3:
Actual charging power of PV array＞Rated charging power of controller
Condition 4:
Actual charging current of PV array＞Rated charging current of controller
When the controller operates under “Condition 3”or“Condition 4”，it will carry out the charging as
per the rated current or power.
When the power of PV module is greater than the rated charging power, and
the maximum open-circuit voltage of PV array is more than
60V(XTRA**06N)/100V(XTRA**10N)/150V(XTRA**15N) (at the lowest
environmental temperature), the controller may be damaged.
According to “Peak Sun Hours diagram”, if the power of PV array exceeds the rated charging power
of controller, then the charging time as per the rated power will be prolonged, so that more energy
can be obtained for charging the battery. However, in the practical application, the maximum power
of PV array shall be not greater than 1.5 x the rated charging power of controller. If the maximum
power of PV array exceeds the rated charging power of controller too much, it will not only cause
the waste of PV modules, but also increase the open-circuit voltage of PV array due to the
influence of environmental temperature, which may make the probability of damage to the
controller rise. Therefore, it is very important to configure the system reasonably. For the
recommended maximum power of PV array for this controller, please refer to the table below:
Max. PV open
circuit voltage
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