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Grid under-voltage
Battery under-voltage
Remote power dispatching
Over-temperature de-rating
Over-high environment temperature and ventilation duct blocking will cause de-rating of
inverter. Over-temperature de-rating regulation is as follows:
If power device temperature reaches the upper limit, the inverter will automatically
decrease the input and output power. After the power device temperature is restored
to the normal range, the inverter will gradually increase the set value.
When the environment temperature in the inverter exceeds the upper limit, the inverter
will automatically power off so as to protect the inverter.
The lower limit of over-temperature de-rating is about 66% of rated
power. If the de-rating reaches the lower limit but the temperature is
not improved, the inverter will shut down automatically.
Grid under-voltage de-rating
If the grid voltage is too low, the inverter will limit the grid current to a specified range
through de-rating. The de-rating of grid under-voltage will be activated when 3-phase grid
voltage reaches 360V. The curvilinear relationship for grid voltage de-rating is as follows:
min
[
360 ]
(
360 )
V
V
n
grid
P
P
V
V
= ×
Working
Zone
n
P
min
V
max
V
360
V
Fig.2-4 Grid under-voltage de-rating
Battery under-voltage de-rating
If the battery voltage is too low, the inverter will limit the battery discharge current to a
specified range through de-rating. The de-rating of battery under-voltage will be activated
when the battery voltage reaches 350V. The curvilinear relationship for battery voltage de-
rating is as follows:
