Delta M Series

10
The solar inverter can be operated in an ambient temperatures from 22 °F to 149 °F (-30°C to
+60°C). The following diagram illustrates how the output power of the solar inverter is reduced
automatically in accordance with ambient temperature.
The device should be installed in a well-ventilated, cool and dry location.
Due to tolerrance of temperature sensor and e󰀩ciency di󰀨erence under di󰀨erent PV voltage, this
derating curve may be a litter di󰀨erent from actual behaviors of unit.
Figure 1: Typical derating curve of M series solar inverter
2.5 Solar inverter PV input DC voltage range
Figure 2: M4-TL-US / M5-TL-US DC voltage range
0
1000
2000
3000
4000
5000
6000
7000
8000
9000
0 100 200 300 400 500 600 700
Pac(W)
PV input(V)
non-operating
range
Voc*
range
*Voc:range
of open circuit
120V
50V
270V
480V
550V
M6-TL-US
M8-TL-US
5760W
7680W
0
1000
2000
3000
4000
5000
6000
0 100 200 300 400 500 600 700
Pac(W)
PV input(V)
non-
operating
Voc*
range
*Voc:range
of open
120V50V
220V
480V
550V
M4-TL-US
M5-TL-US
3840W
4800W
180V
2.4 Ambient temperature