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Illustration · 120 half-cut cells
Solar panelREC Group

REC Group REC365AA

120 half-cut cells, HJT. Power classes 340–385 W in the CEC list.

CEC listed · Jul 15, 2019UL 61730Installed in 30 SoCal permits
Power class
  • Power (STC)365 WCEC nameplate
  • Efficiency≈21.7%calculated from area
  • %/°C Pmax−0.279CEC listing test
  • PTC / STC95%PTC 347 W (CEC)

Power classes

CEC PV Module List (Oct 7, 2026) · Cali-Graf calculation · 10 models
ModelPmaxVoc, VIsc, AVmp, VImp, AEfficiencyPTCCEC listed
REC340AA340 W43.1010.0936.409.34≈20.2%323 WJul 15, 2019
REC345AA345 W43.4010.1236.709.39≈20.5%328 WJul 15, 2019
REC350AA350 W43.8010.1637.109.45≈20.8%332 WJul 15, 2019
REC355AA355 W44.0010.1937.409.50≈21.1%337 WJul 15, 2019
REC360AA360 W44.1010.2337.709.55≈21.4%342 WJul 15, 2019
REC365AA365 W44.3010.2638.009.60≈21.7%347 WJul 15, 2019
REC370AA370 W44.1010.5537.409.90≈21.9%352 WJul 15, 2019
REC375AA375 W44.2010.5837.809.94≈22.2%357 WJun 22, 2020
REC380AA380 W44.3010.6138.109.98≈22.5%362 WJun 22, 2020
REC385AA385 W44.4010.6438.4010.03≈22.8%366 WJun 22, 2020
≈ efficiency = Pmax ÷ CEC-listed area 1.68 m².

Build & dimensions

CEC PV Module List (Oct 7, 2026)

Heat & cold behaviour

CEC PV Module List (Oct 7, 2026) · Cali-Graf calculation
CEC listing test
Pmax coefficient γ−0.279 %/°C
Voc coefficient β−0.241 %/°C
Isc coefficient α+0.037 %/°C
Operating cell temperatureNOCT 44 °C
Vmp coefficient ≈ γ − α (CEC); used only for the hot-roof voltage estimate.

Away from lab conditions — CEC listing test points

ClassPmax at NOCTVmp × Imp at NOCTPmax at 200 W/m²Low-light efficiency vs STC
340 W251.1 W33.85 V × 7.42 A63.1 W93%
345 W254.5 W34.13 V × 7.46 A64 W93%
350 W259 W34.5 V × 7.51 A65.1 W93%
355 W262.4 W34.78 V × 7.55 A66 W93%
360 W265.9 W35.06 V × 7.59 A66.9 W93%
365 W269.5 W35.34 V × 7.63 A67.7 W93%
370 W270.5 W35.28 V × 7.67 A67.3 W91%
375 W274.5 W35.66 V × 7.7 A68.3 W91%
380 W277.8 W35.94 V × 7.73 A69.1 W91%
385 W281.4 W36.22 V × 7.77 A70 W91%
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
2025
PVEL Top Performer
closely related product name
1
Tests passed as Top Performer
PID
9
PVEL Scorecards
REC Group named Top Performer, 2016–2025
3
RETC PV Module Index
REC Group recognized 2023–2025

PVEL Top Performer tests

YearProductTests
2025RECxxxAA Pro XL (closely related product name)PID

Tested bill of materials

Details describe the tested sample, not every module of the series.

RETC PV Module Index — REC Group

YearRecognition
2023High Achievement in Performance (Ptc-to-stc ratio, Module efficiency)
2024High Achievement in Performance
2025Test 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)
46.8 V
Voc when cold
per panel
32.1 V
Vmp when hot
per panel
12
Max panels / string
max DC 600 V
2
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

InverterMax DC inputMPPTWindow sourcePanels per string
Tesla 1538000-xx-y600 V60–480 Vdatasheet2–12
Solis (Ginlong) S6-EH1P10K-H-US600 V80–520 Vdatasheet3–12
Solis (Ginlong) Solis-1P7.6K-4G-US600 V100–500 Vdatasheet4–12
Qcells Q.VOLT H7.6SX498 V234–498 VCEC test window8–10

Microinverters (one per panel)

MicroinverterRecommended module powerMax DC inputMPPTVoc cold / Vmp hotCheckDC/AC
Enphase IQ8PLUS-72-2-US235–440 W60 V29–45 V46.8 / 32.1 V✓ Within range1.26
Enphase IQ8X-80-M-US320–540 W79.5 V43–60 V46.8 / 32.1 V✗ Not a match: module voltage below MPPT range0.96
APsystems (Alt Power System) DS3-L265–570 W60 V28–45 V46.8 / 32.1 V✓ Within range0.47
Enphase IQ8M-72-2-US260–460 W60 V30–45 V46.8 / 32.1 V✓ Within range1.12
Enphase IQ8A-72-2-US295–500 W60 V32–45 V46.8 / 32.1 V✓ Within range1.05
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
CitykWh / kW / yrkWh / panel / yrkWh / system / yrSun, kWh/m²/day
Los Angeles1,67661211,6236.08
Palmdale1,83567012,7266.69
Chula Vista1,69661911,7626.11
Huntington Beach1,64360011,3945.89
Riverside1,69661911,7626.21
Santa Clarita1,72462911,9566.28
759Jan759Feb974Mar1,076Apr1,063May1,130Jun1,190Jul1,204Aug1,053Sep929Oct798Nov691DeckWh per month · Los Angeles
Estimate for comparison, not a quote: shading, roof orientation and local losses change real output. Roof mount, 20° tilt, south, 14% system losses.

Who installs RECxxxAA panels in SoCal

building permits · CSLB License Master
30
Permits naming this series
Jan 2021 – Jun 2022
3
Licensed installers
CSLB license on the permit
2
Jurisdictions so far
LA County (unincorp.) (27), Los Angeles (3)
ES
Elevation Solar LLC
Chandler · CSLB #1048076
1 installNov 2021Los Angeles
MC
Maverick Construction
Long Beach · CSLB #806493
1 installFeb 2022Los Angeles
NR
N R G Clean Power Inc
Canoga Park · CSLB #1026168
1 installJul 2021Los Angeles

Permits over time

2Jan ’2110Mar33May03Jul44Sep12Nov22Jan ’2210Mar10May1permits per month

Power class named in permit

365 W
15
370 W
5
375 W
4
360 W
4
350 W
2

Top ZIP codes

  • ZIP 935366
  • ZIP 910013
  • ZIP 935513
  • ZIP 911073
  • ZIP 935102
  • ZIP 917752
  • Other ZIP codes11

Typical system

median 6.8 kW, 22 panels (n = 12)

Only installer and ZIP level is shown — no homeowner names, street addresses or permit numbers. Permits from LA County (unincorp.) come without a contractor license, so they count toward totals but not toward installers. Counts grow as more permit portals are loaded.

Installed together with

building permits

Microinverters

Enphase IQ7+
9

Inverters

SolarEdge SE…H (HD-Wave)
15

Optimizers

SolarEdge Power Optimizer
13
Number of permits naming both this panel series and the product; 26 of 30 permits list other equipment.

Compare with similar 365 W panels

CEC PV Module List (Oct 7, 2026) · Kiwa PVEL Scorecard · Qcells datasheet · building permits
PanelPmaxEfficiencyγ Pmax (CEC)Voc, VIsc, APVEL (product / brand)SoCal permits (series)
REC Group REC365AA365 W≈21.7%−0.27944.310.26brand 9×30
LONGi LR4-60HPB-365M365 W≈20.6%−0.3394111.41product 2021, 2022193
Trina Solar TSM-365DE06X.05(II)365 W≈20.1%−0.3394510.35product 202223
Qcells Q.PEAK DUO-G8+ 360360 W≥20.1%−0.34341.1910.84product 202220
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

Other series by SoCal permits

RECxxxAA Pure · 66RECxxxAA Pure-RX · 33RECxxxAA Black · 8RECxxxNP3 Black · 7RECxxxAA Pure 2 · 6RECxxxNP · 4

Questions & answers

How efficient is the REC Group REC365AA?

Calculated from the panel area (1.68 m²): about 21.7% for the 365 W class. 365 W over 1.68 m² equals about 217 W per square meter.

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

PVWatts v8 with typical-year weather gives about 612 kWh per year per 365 W panel in Los Angeles and about 670 kWh in Palmdale (20° roof, facing south, 14% system losses).

How much power does it lose on a hot roof?

With γ = −0.279 %/°C, at a 77 °C cell temperature (hottest modeled hour in Palmdale) output is about 14.5% 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 2–12 panels per string (Voc at 2 °C = 46.8 V, Vmp at 74 °C cell = 32.1 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 46.8 V vs max input 60 V; Vmp when hot 32.1 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?

RECxxxAA Pro XL was a PVEL Top Performer in 2025 (PID) — a closely related product name.

Who installs it in Southern California?

Building permits name this series 30 times (Jan 2021 – Jun 2022). The most active licensed installers are Elevation Solar LLC, Maverick Construction, N R G Clean Power Inc.

Sources

  1. California Energy Commission — Solar Equipment Lists, PV Module List, Inverter List (snapshot Oct 7, 2026).
  2. Qcells — manufacturer datasheet “Q.PEAK DUO-G8+ 345-360 EN ENDURING HIGH”.
  3. Kiwa PVEL — PV Module Reliability Scorecard, Top Performer lists 2016–2025.
  4. RETC — PV Module Index reports 2023–2025.
  5. NLR (formerly NREL) — System Advisor Model CEC inverter library (version 2026.7.3).
  6. NLR (formerly NREL) — PVWatts v8, NSRDB PSM v3 typical-year weather for Los Angeles, Palmdale, Chula Vista, Huntington Beach, Riverside, Santa Clarita.
  7. Inverter datasheets — APsystems (Alt Power System), Enphase, Solis (Ginlong), Tesla (manufacturer documents).
  8. Building permits — Los Angeles County Public Works (EPIC-LA, unincorporated areas) (Jan 2021 – Jun 2022); LADBS, City of Los Angeles (Jul 2021 – Feb 2022). Equipment matched from permit descriptions by model number.
  9. Contractors State License Board — License Master (contractor names and license status), as of Oct 5, 2026.
  10. Cali-Graf calculations — formulas and inputs are shown next to each calculated value (efficiency from area, temperature-corrected voltages, string sizing, energy estimates).