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68.5″ · 1,740 mmmicro
41″ · 1,042 mm wide · 1.57″ (40 mm) frame · 44.5 lb (20.2 kg)
AC solar panelLG Electronics

LG Electronics LG370M1K-A6

60 cells, N-type, with a built-in LM320UE-A2 microinverter. Power classes 355–380 W in the CEC list.

CEC listed · May 11, 2021UL 1741AC module · built-in microinverterN-type
Power class
  • Power (STC)370 WCEC nameplate
  • Efficiency≈20.4%calculated from area
  • %/°C Pmax−0.344CEC listing test
  • Degradation / yr0.33%after year 1 (warranty)

Power classes

CEC PV Module List (Oct 7, 2026) · Cali-Graf calculation · 6 models
ModelPmaxVoc, VIsc, AVmp, VImp, AEfficiencyPTCCEC listed
LG355M1K-A6355 W41.6010.8434.3010.37≈19.6%329 WMay 11, 2021
LG360M1K-A6360 W41.7010.8834.7010.39≈19.9%333 WMay 11, 2021
LG365M1K-A6365 W41.8010.9235.1010.41≈20.1%338 WMay 11, 2021
LG370M1K-A6370 W41.9019.9635.5010.43≈20.4%343 WMay 11, 2021
LG375M1K-A6375 W42.0011.0035.9010.45≈20.7%346 WSep 13, 2021
LG380M1K-A6380 W42.1011.0436.3010.47≈21.0%351 WSep 13, 2021
≈ efficiency = Pmax ÷ panel area 1.813 m² (datasheet size).

Built-in microinverter

CEC PV Module List (Oct 7, 2026) · NLR SAM inverter library · Cali-Graf calculation
The string calculator does not apply: each panel has its own microinverter, wired as AC branch circuits.

Build & dimensions

LG Electronics datasheet · Cali-Graf calculation · 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−0.344 %/°C
Voc coefficient β−0.260 %/°C
Isc coefficient α+0.029 %/°C
Operating cell temperatureNOCT 47.1 °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
355 W266.9 W31.9 V × 8.37 A70.1 W99%
360 W270.5 W32.27 V × 8.38 A71.1 W99%
365 W274.2 W32.64 V × 8.4 A72.1 W99%
370 W277.8 W33.01 V × 8.42 A73 W99%
375 W267.2 W32.21 V × 8.3 A71 W95%
380 W270.7 W32.57 V × 8.31 A72 W95%
Pmax = Vmp × Imp from the CEC listing; low-light efficiency = Pmax at 200 W/m² ÷ (20% of STC Pmax).

Electrical & strength ratings

LG Electronics datasheet
Packaging: 25 per pallet

Certifications

CEC PV Module List (Oct 7, 2026) · LG Electronics datasheet
UL 1741IEC 61701Fire rating Type 2 (UL 61730)ISO 14001ISO 45001ISO 9001

Warranty & degradation

LG Electronics datasheet · Cali-Graf calculation
85%89%92%96%100%051015202598.5% yr 195.53% yr 1090.58% yr 25years
  • Product warranty25 years
  • Year 1≥ 98.5%
  • Then≤ 0.33% / year
  • Year 10≥ 95.53%calculated from warranty terms
  • Year 25≥ 90.6%

Independent reliability testing

Kiwa PVEL Scorecard
2
PVEL Scorecards
LG Electronics named Top Performer, 2018–2021
This exact series is not listed in published PVEL Top Performer tables. Results below are for the manufacturer.

Expected production in Southern California

NLR PVWatts v8 · Cali-Graf calculation
CitykWh / kW / yrkWh / panel / yrkWh / system / yrSun, kWh/m²/day
Los Angeles1,67662011,7826.08
Palmdale1,83567912,9006.69
Chula Vista1,69662811,9236.11
Huntington Beach1,64360811,5505.89
Riverside1,69662811,9236.21
Santa Clarita1,72463812,1206.28
769Jan770Feb988Mar1,091Apr1,078May1,145Jun1,206Jul1,220Aug1,067Sep941Oct809Nov700DeckWh 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.

Documents

manufacturer documents

Questions & answers

How efficient is the LG Electronics LG370M1K-A6?

Calculated from the panel area (1.81 m²): about 20.4% for the 370 W class. 370 W over 1.81 m² equals about 204 W per square meter.

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

PVWatts v8 with typical-year weather gives about 620 kWh per year per 370 W panel in Los Angeles and about 679 kWh in Palmdale (20° roof, facing south, 14% system losses).

How much power does it lose on a hot roof?

With γ = −0.344 %/°C, at a 77 °C cell temperature (hottest modeled hour in Palmdale) output is about 17.8% below the STC rating.

What microinverter is built into the LG Electronics LG370M1K-A6?

The CEC listing names LM320UE-A2 paired with the LG355N1K-A6 DC module; the microinverter is rated 322 W AC.

What does the warranty cover?

25 years on the product: at least 98.5% of rated power in year 1, then no more than 0.33% per year — at least 90.6% after 25 years (manufacturer datasheet).

How big and heavy is it?

68.5 × 41 × 1.57 in (1,740 × 1,042 × 40 mm), 44.5 lb (20.2 kg).

Has this panel been reliability-tested?

This exact series is not in published PVEL Top Performer tables; LG Electronics was named a Top Performer in 2 Scorecards (2018–2021).

What fire rating does it have?

UL 61730 fire rating Type 2 per datasheet.

Sources

  1. California Energy Commission — Solar Equipment Lists, PV Module List (snapshot Oct 7, 2026).
  2. LG Electronics — datasheet Specification Sheet.
  3. LG Electronics — document library on the manufacturer’s website (links above).
  4. Kiwa PVEL — PV Module Reliability Scorecard, Top Performer lists 2018–2021.
  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. Cali-Graf calculations — formulas and inputs are shown next to each calculated value (efficiency from area, temperature-corrected voltages, string sizing, energy estimates).