Page 12
Copyright Enphase Energy Inc. 2008
Release 1.4
6
Technical Data
WARNING:
It is required to match the DC operating voltage range of
the PV module with the allowable input voltage range of the Enphase
Micro-Inverter.
WARNING:
The maximum open circuit voltage of the PV module may
not exceed the specified maximum input voltage of the Enphase Micro-
Inverter.
The Enphase M175-24-240-S Micro-Inverter has been specifically optimized for
operation with most 72-cell (24V nominal) PV module configurations. Be sure to
verify the voltage and current specifications of your PV module match with those of
the Micro-Inverter.
The output voltage and current of the PV module depends on the quantity, size and
temperature of the PV cells, as well as the solar insolation on each cell. The highest
PV module output voltage occurs when the temperature of the cells is the lowest and
the module is at open circuit (not operating). The maximum short circuit current
rating of the module must be equal to or less than the maximum input DC short
circuit current rating of the Micro-Inverter. A list of compatible PV modules is
maintained on the Enphase website (www.enphaseenergy.com).
M175-24-240-S Micro-Inverter Operating Parameters
Topic
Unit
Min
Typical
Max
DC Operating Parameters
MPPT voltage range
V
25
32
40
Maximum DC input voltage
V
54
Maximum DC input short circuit
current
A
10
Maximum DC input current
A
8
Ground fault protection
mA
1000
AC Operating Parameters
Maximum AC output Power (at 65
deg. C)
W
175
Output power factor
0.85
0.99
1
Nominal AC output voltage range
Vrms
211
240
264
Extended AC output voltage range
Vrms
206
240
269
Maximum AC output current
mA
750
830
Nominal AC output frequency range
Hz
59.3
60
60.5
Extended AC output frequency range
Hz
59.2
60
60.6
Maximum AC output over current
protection
A
15
Maximum AC output fault current
A/ms
20/0.1
