Off
Off
Grid
Grid
Inverter
Inverter
11
Figure2-2 Internal circuit structure diagram of SDP off grid inverter
2.3.2 Derating
Reduce the output power is a way to prevent inverter overload or some potential
problems. When the operating environment temperature and altitude are too high,
both can cause inverter derate operation.
Environment temperature too high
Inverter temperature derating curves in below
Figure2-3 Inverter temperature derating curve
η=
(
Pout/Pnom
)
x100
T is environment temperature
Pout is the off grid inverter actual max. output power
Pnom is the off grid inverter allowed max. output power