39.2″ · 996 mm wide · 1.57″ (40 mm) frame · 48.5 lb (22 kg)

Solar panelMitrex

Mitrex M390-A1F

Name: Mitrex M390-A1F
Brand: Mitrex

72 cells. Power classes 390–400 W in the CEC list.

CEC listed · Dec 21, 2022UL 61730

Power class

Power (STC)390 WCEC nameplate
Efficiency≈19.2%calculated from area
%/°C Pmax−0.36CEC test: −0.358
Output at year 2580%performance warranty

Power classes

CEC PV Module List (Oct 7, 2026) · Cali-Graf calculation · 2 models

Model	Pmax	Voc, V	Isc, A	Vmp, V	Imp, A	Efficiency	PTC	CEC listed
M390-A1F	390 W	48.20	9.77	41.90	9.31	≈19.2%	359 W	Dec 21, 2022
M400-A1F	400 W	48.30	9.87	42.30	9.46	≈19.7%	369 W	Dec 21, 2022

≈ efficiency = Pmax ÷ panel area 2.028 m² (datasheet size).

Build & dimensions

Mitrex datasheet · Cali-Graf calculation

Dimensions80.2 × 39.2 × 1.57 in2,036 × 996 × 40 mm
Module area2.03 m² (21.8 ft²)length × width
Weight48.5 lb (22 kg)
Cells72 cells
Front glass3.2mm tempered glass, high transmittance
Back coverHigh durability, UV resistant, PV backsheet
FrameAnodized aluminum alloy black frame
Junction boxIP68 rated, TUV and UL certified

Heat & cold behaviour

Mitrex datasheet · CEC PV Module List (Oct 7, 2026) · Cali-Graf calculation

	Datasheet	CEC listing test
Pmax coefficient γ	−0.36 %/°C	−0.358 %/°C
Voc coefficient β	−0.27 %/°C	−0.267 %/°C
Isc coefficient α	+0.04 %/°C	+0.037 %/°C
Vmp coefficient	≈ −0.40 %/°C	—
Operating cell temperature	NMOT 42 ± 3 °C	NOCT 47.5 °C

Vmp coefficient ≈ γ − α (datasheet); used only for the hot-roof voltage estimate.

Away from lab conditions — CEC listing test points

Class	Pmax at NOCT	Vmp × Imp at NOCT	Pmax at 200 W/m²	Low-light efficiency vs STC
390 W	277.1 W	37.3 V × 7.43 A	73.3 W	94%
400 W	284.3 W	37.66 V × 7.55 A	75.2 W	94%

Pmax = Vmp × Imp from the CEC listing; low-light efficiency = Pmax at 200 W/m² ÷ (20% of STC Pmax).

Electrical & strength ratings

Mitrex datasheet

Max system voltage1,000 V
Max series fuse20 A
Module temperature−40 °F to +185 °F−40 °C to +85 °C

Packaging: 25 per pallet

Certifications

CEC PV Module List (Oct 7, 2026) · Mitrex datasheet

UL 61730IEC 61215IEC 61730

UL 61730CEC listing
IEC 61215datasheet
IEC 61730datasheet

Warranty & degradation

Mitrex datasheet

Product warranty25 years
Year 25≥ 80%

Inverter compatibility & string sizing

Mitrex datasheet · Cali-Graf calculation · NLR PVWatts v8 · CEC PV Module List (Oct 7, 2026) · inverter datasheets · NLR SAM inverter library · CEC Grid Support Inverter List (Oct 7, 2026)

CityColdest air, °CHottest cell, °CString inverter

51.2 V

Voc when cold

per panel

33.7 V

Vmp when hot

per panel

Max panels / string

max DC 600 V

Min panels / string

MPPT from 60 V

Defaults come from NLR TMY weather (coldest hour, hottest modeled cell). Code calculations (NEC 690.7) use the ASHRAE extreme annual minimum, which is usually colder — enter it above.

String inverters most named in SoCal permits

Inverter	Max DC input	MPPT	Window source	Panels per string
Tesla 1538000-xx-y	600 V	60–480 V	datasheet	2–11
Solis (Ginlong) S6-EH1P10K-H-US	600 V	80–520 V	datasheet	3–11
Solis (Ginlong) Solis-1P7.6K-4G-US	600 V	100–500 V	datasheet	3–11
Qcells Q.VOLT H7.6SX	498 V	234–498 V	CEC test window	7–9

Microinverters (one per panel)

Microinverter	Recommended module power	Max DC input	MPPT	Voc cold / Vmp hot	Check	DC/AC
Enphase IQ8PLUS-72-2-US	235–440 W	60 V	29–45 V	51.2 / 33.7 V	✓ Within range	1.34
Enphase IQ8X-80-M-US	320–540 W	79.5 V	43–60 V	51.2 / 33.7 V	✗ Not a match: module voltage below MPPT range	1.03
APsystems (Alt Power System) DS3-L	265–570 W	60 V	28–45 V	51.2 / 33.7 V	✓ Within range	0.5
Enphase IQ8M-72-2-US	260–460 W	60 V	30–45 V	51.2 / 33.7 V	✓ Within range	1.2
Enphase IQ8A-72-2-US	295–500 W	60 V	32–45 V	51.2 / 33.7 V	✓ Within range	1.12

Voltage check against the microinverter datasheets — confirm the pairing on the manufacturer’s module compatibility list. Rows appear only when the panel’s power is inside the microinverter’s recommended module power range.

SolarEdge and other optimizer-based systems size strings by the optimizer rules — use the manufacturer’s designer. Reference inverters: most named in SoCal permits since Oct 2024.

Expected production in Southern California

NLR PVWatts v8 · Cali-Graf calculation

PanelsCity for chartSystem size

City	kWh / kW / yr	kWh / panel / yr	kWh / system / yr	Sun, kWh/m²/day
Los Angeles	1,676	654	11,766	6.08
Palmdale	1,835	716	12,882	6.69
Chula Vista	1,696	661	11,906	6.11
Huntington Beach	1,643	641	11,534	5.89
Riverside	1,696	661	11,906	6.21
Santa Clarita	1,724	672	12,102	6.28

Estimate for comparison, not a quote: shading, roof orientation and local losses change real output. Roof mount, 20° tilt, south, 14% system losses.

Compare with similar 390 W panels

CEC PV Module List (Oct 7, 2026) · Qcells datasheet · Kiwa PVEL Scorecard · building permits

Panel	Pmax	Efficiency	γ Pmax (CEC)	Voc, V	Isc, A	PVEL (product / brand)	SoCal permits (series)
Mitrex M390-A1F	390 W	≈19.2%	−0.358	48.2	9.77	—	—
Qcells Q.PEAK DUO BLK ML-G10+ 390	390 W	≥19.9%	−0.362	45.23	11.07	product 2022, 2023	221
JA Solar JAM54S31-390/MR	390 W	≈20.5%	−0.329	36.85	13.61	product 2023, 2024	152
REC Group REC390AA Pure	390 W	≈21.8%	−0.256	48.6	10.19	brand 9× (2016–2025)	66

Same fields from the same sources for every row; ≈ efficiency is calculated from the listed area. Comparable series: other brands, same product group, power range covering this class.

Questions & answers

How efficient is the Mitrex M390-A1F?

Calculated from the panel area (2.03 m²): about 19.2% for the 390 W class. 390 W over 2.03 m² equals about 192 W per square meter.

How much energy does one panel produce in Los Angeles or Palmdale?

PVWatts v8 with typical-year weather gives about 654 kWh per year per 390 W panel in Los Angeles and about 716 kWh in Palmdale (20° roof, facing south, 14% system losses).

How much power does it lose on a hot roof?

With γ = −0.36 %/°C, at a 77 °C cell temperature (hottest modeled hour in Palmdale) output is about 18.6% below the STC rating.

How many panels fit on one string?

With the Tesla 1538000-xx-y (max DC 600 V, MPPT from 60 V, datasheet) in Los Angeles the calculator gives 2–11 panels per string (Voc at 2 °C = 51.2 V, Vmp at 74 °C cell = 33.7 V). Final design must follow the inverter manual and NEC 690.7.

Does it work with Enphase IQ8PLUS-72-2-US microinverters?

Voltage check against the Enphase datasheet: Voc when cold 51.2 V vs max input 60 V; Vmp when hot 33.7 V vs MPPT low 29 V; recommended module power 235–440 W. Confirm on the microinverter maker’s compatibility list.

What does the warranty cover?

25 years on the product: at least 80% after 25 years (manufacturer datasheet).

How big and heavy is it?

80.2 × 39.2 × 1.57 in (2,036 × 996 × 40 mm), 48.5 lb (22 kg).

Sources

California Energy Commission — Solar Equipment Lists, PV Module List, Inverter List (snapshot Oct 7, 2026).
Mitrex — manufacturer datasheet “HIGH EFFICIENCY MONO PV MODULE NORTH AMERICAN”.
Qcells — manufacturer datasheet “Q.PEAK DUO BLK ML-G10+ ENDURING HIGH PERFORMANCE”.
Kiwa PVEL — PV Module Reliability Scorecard, Top Performer lists.
NLR (formerly NREL) — System Advisor Model CEC inverter library (version 2026.7.3).
NLR (formerly NREL) — PVWatts v8, NSRDB PSM v3 typical-year weather for Los Angeles, Palmdale, Chula Vista, Huntington Beach, Riverside, Santa Clarita.
Inverter datasheets — APsystems (Alt Power System), Enphase, Solis (Ginlong), Tesla (manufacturer documents).
Building permits — Southern California permit portals. Equipment matched from permit descriptions.
Cali-Graf calculations — formulas and inputs are shown next to each calculated value (efficiency from area, temperature-corrected voltages, string sizing, energy estimates).