Illustration · 144 half-cut cells

Solar panelREC Group

REC Group REC380NP 72

Name: REC Group REC380NP 72
Brand: REC Group

144 half-cut cells. Power classes 365–400 W in the CEC list.

CEC listed · Apr 13, 2020UL 61730

Power class

Power (STC)380 WCEC nameplate
Efficiency≈19.5%calculated from area
%/°C Pmax−0.348CEC listing test
PTC / STC93.4%PTC 355 W (CEC)

Power classes

CEC PV Module List (Oct 7, 2026) · Cali-Graf calculation · 8 models

Model	Pmax	Voc, V	Isc, A	Vmp, V	Imp, A	Efficiency	PTC	CEC listed
REC365NP 72	365 W	47.40	10.12	39.10	9.35	≈18.7%	341 W	Apr 13, 2020
REC370NP 72	370 W	47.70	10.16	39.30	9.42	≈19.0%	346 W	Apr 13, 2020
REC375NP 72	375 W	48.10	10.20	39.70	9.46	≈19.3%	350 W	Apr 13, 2020
REC380NP 72	380 W	48.50	10.24	39.80	9.56	≈19.5%	355 W	Apr 13, 2020
REC385NP 72	385 W	48.90	10.28	40.00	9.63	≈19.8%	360 W	Apr 13, 2020
REC390NP 72	390 W	49.10	10.32	40.20	9.72	≈20.0%	365 W	Apr 13, 2020
REC395NP 72	395 W	49.30	10.36	40.50	9.77	≈20.3%	369 W	Apr 13, 2020
REC400NP 72	400 W	49.40	10.40	40.70	9.84	≈20.5%	374 W	Apr 13, 2020

≈ efficiency = Pmax ÷ CEC-listed area 1.95 m².

Build & dimensions

CEC PV Module List (Oct 7, 2026)

Module area1.95 m² (21 ft²)CEC-listed area
Cells144 half-cut cells
Back coverWhite backsheet

Heat & cold behaviour

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

	CEC listing test
Pmax coefficient γ	−0.348 %/°C
Voc coefficient β	−0.266 %/°C
Isc coefficient α	+0.031 %/°C
Operating cell temperature	NOCT 44.4 °C

Vmp coefficient ≈ γ − α (CEC); 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
365 W	274.6 W	37.33 V × 7.36 A	70 W	96%
370 W	278.1 W	37.52 V × 7.41 A	70.9 W	96%
375 W	282.1 W	37.9 V × 7.44 A	71.9 W	96%
380 W	285.8 W	38 V × 7.52 A	72.9 W	96%
385 W	289.4 W	38.19 V × 7.58 A	73.8 W	96%
390 W	293.5 W	38.38 V × 7.65 A	74.9 W	96%
395 W	297.3 W	38.66 V × 7.69 A	75.8 W	96%
400 W	300.9 W	38.86 V × 7.74 A	76.7 W	96%

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

Independent reliability testing

Kiwa PVEL Scorecard · RETC PV Module Index

PVEL Scorecards

REC Group named Top Performer, 2016–2025

RETC PV Module Index

REC Group recognized 2023–2025

This exact series is not listed in published PVEL Top Performer tables. Results below are for the manufacturer.

RETC PV Module Index — REC Group

Year	Recognition
2023	High Achievement in Performance (Ptc-to-stc ratio, Module efficiency)
2024	High Achievement in Performance
2025	Test Category High Achiever

Inverter compatibility & string sizing

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

CityColdest air, °CHottest cell, °CString inverter

51.5 V

Voc when cold

per panel

32.4 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. β is the CEC-measured coefficient; NEC 690.7 calculations use the datasheet value.

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	4–11
Qcells Q.VOLT H7.6SX	498 V	234–498 V	CEC test window	8–9

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	51.5 / 32.4 V	✓ Within range	1.31
Enphase IQ8X-80-M-US	320–540 W	79.5 V	43–60 V	51.5 / 32.4 V	✗ Not a match: module voltage below MPPT range	1
APsystems (Alt Power System) DS3-L	265–570 W	60 V	28–45 V	51.5 / 32.4 V	✓ Within range	0.49
Enphase IQ8M-72-2-US	260–460 W	60 V	30–45 V	51.5 / 32.4 V	✓ Within range	1.17
Enphase IQ8A-72-2-US	295–500 W	60 V	32–45 V	51.5 / 32.4 V	✓ Within range	1.09

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	637	11,464	6.08
Palmdale	1,835	697	12,551	6.69
Chula Vista	1,696	644	11,601	6.11
Huntington Beach	1,643	624	11,238	5.89
Riverside	1,696	644	11,601	6.21
Santa Clarita	1,724	655	11,792	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 380 W panels

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

Panel	Pmax	Efficiency	γ Pmax (CEC)	Voc, V	Isc, A	PVEL (product / brand)	SoCal permits (series)
REC Group REC380NP 72	380 W	≈19.5%	−0.348	48.5	10.24	brand 9×	—
Qcells Q.PEAK DUO BLK ML-G10+ 380	380 W	≈19.4%	−0.362	45.16	11.01	product 2022, 2023	221
JA Solar JAM54S31-385/MR	385 W	≈20.3%	−0.329	36.71	13.52	product 2023, 2024	152
Canadian Solar CS6R-380MS-HL {Blk}	380 W	≥19.5%	−0.328	36	13.55	product 2024	46

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.

About REC Group

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

ManufacturerREC Group
Listed in CEC asREC Group
PVEL Top Performer (manufacturer)9 Scorecards (2016–2025)
RETC PV Module Index2023, 2024, 2025
Current panel series in CEC list26

Other series by SoCal permits

RECxxxAA Pure · 66RECxxxAA Pure-RX · 33RECxxxAA · 30RECxxxAA Black · 8RECxxxNP3 Black · 7RECxxxAA Pure 2 · 6

Questions & answers

How efficient is the REC Group REC380NP 72?

Calculated from the panel area (1.95 m²): about 19.5% for the 380 W class. 380 W over 1.95 m² equals about 195 W per square meter.

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

PVWatts v8 with typical-year weather gives about 637 kWh per year per 380 W panel in Los Angeles and about 697 kWh in Palmdale (20° roof, facing south, 14% system losses).

How much power does it lose on a hot roof?

With γ = −0.348 %/°C, at a 77 °C cell temperature (hottest modeled hour in Palmdale) output is about 18% 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 = 51.5 V, Vmp at 74 °C cell = 32.4 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 51.5 V vs max input 60 V; Vmp when hot 32.4 V vs MPPT low 29 V; recommended module power 235–440 W. Confirm on the microinverter maker’s compatibility list.

Has this panel been reliability-tested?

This exact series is not in published PVEL Top Performer tables; REC Group was named a Top Performer in 9 Scorecards (2016–2025).

Sources

California Energy Commission — Solar Equipment Lists, PV Module List, Inverter List (snapshot Oct 7, 2026).
Qcells — manufacturer datasheet “Q.PEAK DUO BLK ML-G10+ ENDURING HIGH PERFORMANCE”.
Canadian Solar — datasheet HiKu6 (All-Black) ALL BLACK MONO PERC CS6R-380|385|390|395|400|405MS-HL.
Kiwa PVEL — PV Module Reliability Scorecard, Top Performer lists 2016–2025.
RETC — PV Module Index reports 2023–2025.
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).