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 not be greater than 1.2 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 increase
the probability of damage to the controller rise. Therefore, it is very important to configure the
system reasonably.
5.3.2 PV array maximun power
The MPPT controller has the function of current/power-limiting, that is during the charging
process, when the charging current or power exceeds the rated charging current or power, the
controller will automatically limit the charging current or power to the rated charging current
or power, which can effectively protect the charging parts of controller, and prevent damages
to the controller due to the connection of some over-specification PV modules.
!
charging current of PV array＞Rated charging current of controller" ，the controller will
carry out the charging as per the rated current or power.
If "Actual charging power of PV array＞Rated charging power of controller" or "Actual
10
48V System(Solar array up to 3000W)
Solar array
MPP-Voltage[V]
Solar array
MPP-Current[A]
Cable Length
2 * 5m
Cable Length
2 * 10m
Cable Length
2 * 20m
72
90
108
≥126
42
34
28
24
16mm²/5AWG
16mm²/5AWG
10mm²/7AWG
16mm²/5AWG
35mm²/2AWG
25mm²/3AWG
16mm²/5AWG
35mm²/2AWG
Not recommended
Not recommended
35mm²/2AWG
35mm²/2AWG
!
capacity of cables.
please consult local regulations regarding maximum allowed current carrying
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