Technical data

M250 Installation and Operation
 2013 Enphase Energy Inc. 141-00022 Rev 01
31
Enphase M250 Microinverter Parameters
Topic
Unit
Min
Typical
Max
Features and Specifications
Compatibility
Pairs with most 60-cell PV modules (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)
Dimensions not including mounting bracket (approximate)
171 mm x 173 mm x 30 mm
Weight
2 Kg
Enclosure environmental rating
NEMA 6
Torque specifications for fasteners
(Do not over torque.)
 6 mm (1/4”) mounting hardware: 5 N m (45 to
50 in-lbs)
 8 mm (5/16”) mounting hardware: 9 N m (80
to 85 in-lbs)
Cooling
Natural convection: no fans
Communication
Power line
Standard warranty term
http://enphase.com/warranty
Compliance
UL1741, IEEE1547, FCC Part 15 Class B
CAN/CSA-C22.2 NO. 0-M91, 0.4-04, and 107.1-01
Integrated ground (no GEC required)
The DC circuit meets the requirements for
ungrounded PV arrays in NEC 690.35
Integrated DC disconnect
The DC connector has been evaluated and
approved for use as the load-break disconnect
required by NEC 690.
Integrated AC disconnect
The AC connector has been evaluated and
approved for use as the load-break disconnect
required by NEC 690.
Engage Cable Specifications
Specification
Value
System temperature range (ambient)
-40C to +65C (-40F to +149F)
Cable temperature rating
+90C Dry / +90C Wet
Cable rating
TC-ER
Conductor insulator rating
THWN-2
Environmental protection rating
IEC 60529 IP67
UV exposure rating
UL 746 C, F1
Compliance
UL 486A/B, UL 514C, UL 6703, UL 9703, IEC
60529 IP67, CAN/CSA 22.2 No. 21, 182.3
Conductor size
12 AWG
Cable diameter
208 VAC: 11.75mm (0.463")
240 VAC: 10.75mm (0.425”)
Minimum bend radius
4.75 inches (12 cm)
Drop connector dimensions
11.8 cm x 6.0 cm x 3.2 cm (4.64” x 2.36” x 1.25”)
Terminator cap dimensions
3.6 cm diameter x 5.1 cm tall (1.4” x 2”)