Technical data

M250 Installation and Operation
 2013 Enphase Energy Inc. 141-00022 Rev 01
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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
Enphase M250 Microinverter Parameters
Topic
Unit
Min
Typical
Max
DC Parameters
MPPT voltage range
V
27
39
Operating range
V
16
48
Maximum DC input voltage
V
48
Minimum / Maximum start voltage
V
22
48
Maximum DC input short circuit current
A
15
Maximum DC input current
A
9.8
Maximum AC backfeed current to input source
A
0