Technical data

M250 Installation and Operation
 2013 Enphase Energy Inc. 141-00022 Rev 01
30
Enphase M250 Microinverter Parameters
Topic
Unit
Min
Typical
Max
AC Parameters
Rated continuous AC output power (-40C to +65C)
W
240
Peak AC output power
W
250
Output power factor
>0.95
Nominal continuous AC output voltage range
240 VAC (split phase)
208 VAC (three phase)
Vrms
Vrms
211
183
240
208
264
229
Maximum AC output current at nominal voltage
240 VAC (split phase)
208 VAC (three phase)
Arms
Arms
1.0
1.15
Nominal AC output frequency range
Hz
57
60
61
Extended AC output frequency range
2
57
62.5
Maximum AC output over current protection device
A
20 A
Maximum AC output fault current & duration
mA rms for 6 cycles
850
Voltage trip limit accuracy
%
2.5
Frequency trip limit accuracy
Hz
±0.1
Trip time accuracy
cycles
±2
Miscellaneous Parameters
Maximum microinverters per 20 amp AC branch circuit
240 VAC (split phase)
208 VAC (three phase)
16
24
3
Peak inverter efficiency
%
96.5
CEC weighted efficiency, 240 VAC
%
96.5
CEC weighted efficiency, 208 VAC
%
96.0
Static MPPT efficiency (weighted, ref EN 50530)
%
99.4
Total harmonic distortion
%
2.5
5
Operating temperature range (internal)
C
-40
+85
Ambient temperature range
C
-40
+65
Night tare loss
mW
65
Storage temperature range
C
-40
+65
2
Frequency ranges can be extended beyond nominal if required by the utility
3
To avoid potential phase imbalance, minimize the number of unused connectors with three-phase systems. See
“Planning for Cable Lengths and Type” on page 27 for more information.