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Technical Data
Technical Considerations
The M250 may be paired only with a 60-cell PV module. The PV module DC conductors must be labeled
"PV Wire" or "PV Cable" to be compliant with NEC 690.35(D) for Ungrounded PV Power Systems. Be
sure to verify the voltage and current specifications of your PV module match those of the microinverter.
WARNING: You must match the DC operating voltage range of the PV module with the
allowable input voltage range of the Enphase Microinverter.
WARNING: The maximum open circuit voltage of the PV module must not exceed the
specified maximum input voltage of the Enphase Microinverter.
The output voltage and current of the PV module depends on the quantity, size and temperature of the
PV cells, as well as the insulation on each cell. The highest PV module output voltage occurs when the
temperature of the cells is the lowest and the PV module is at open circuit (not operating). The maximum
short circuit current rating of the PV module must be equal to or less than the maximum input DC short
circuit current rating of the microinverter.
M250 Specifications
Topic
MPPT voltage range
Operating range
Maximum DC input voltage
Minimum / Maximum start voltage
Maximum DC input short circuit current
Maximum DC input current
Maximum AC backfeed current to input source
29
Enphase M250 Microinverter Parameters
DC Parameters
2013 Enphase Energy Inc.
M250 Installation and Operation
Unit
Min
Typical
V
27
V
16
V
V
22
A
A
A
Max
39
48
48
48
15
9.8
0
141-00022 Rev 01
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