41″ · 1,042 mm wide · 1.57″ (40 mm) frame · 40.8 lb (18.5 kg)

Solar panelLG Electronics

LG Electronics LG400Q1C-A6

Name: LG Electronics LG400Q1C-A6
Brand: LG Electronics

60 cells, N-type. Power classes 390–405 W in the CEC list; datasheet covers 390–390 W.

CEC listed · Feb 1, 2021UL 61730PVEL Top Performer 2021N-typeSeen in 1 SoCal permit

Power class

Power (STC)400 WCEC nameplate
Efficiency≈22.1%calculated from area
%/°C Pmax−0.29CEC test: −0.310
Degradation / yr0.25%after year 1 (warranty)

Power classes

CEC PV Module List (Oct 7, 2026) · LG Electronics datasheet · Cali-Graf calculation · 4 models

Model	Pmax	Voc, V	Isc, A	Vmp, V	Imp, A	Efficiency	PTC	CEC listed
LG390Q1C-A6	390 W	43.50	11.26	36.70	10.63	≥21.5%	364 W	Feb 1, 2021
LG395Q1C-A6	395 W	43.60	11.29	37.00	10.69	≈21.8%	369 W	Feb 1, 2021
LG400Q1C-A6	400 W	43.80	11.32	37.20	10.76	≈22.1%	374 W	Feb 1, 2021
LG405Q1C-A6	405 W	43.90	11.35	37.50	10.82	≈22.3%	379 W	Feb 1, 2021

≈ efficiency = Pmax ÷ panel area 1.813 m² (datasheet size) for classes outside the datasheet.

Build & dimensions

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

Dimensions68.5 × 41 × 1.57 in1,740 × 1,042 × 40 mm
Module area1.81 m² (19.5 ft²)length × width
Weight40.8 lb (18.5 kg)
Cells60 cellsN-type
Back coverWhite backsheet

Heat & cold behaviour

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

	Datasheet	CEC listing test
Pmax coefficient γ	−0.29 %/°C	−0.310 %/°C
Voc coefficient β	−0.24 %/°C	−0.242 %/°C
Isc coefficient α	+0.04 %/°C	+0.027 %/°C
Vmp coefficient	≈ −0.33 %/°C	—
Operating cell temperature	NMOT 44 ± 3 °C	NOCT 47.7 °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	290 W	34.31 V × 8.45 A	73.8 W	95%
395 W	294 W	34.59 V × 8.5 A	74.8 W	95%
400 W	297.5 W	34.78 V × 8.55 A	75.7 W	95%
405 W	301.6 W	35.06 V × 8.6 A	76.7 W	95%

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

Max system voltage1,000 V
Max series fuse20 A
Fire rating (UL 61730)Type 1
Module temperature−40 °F to +185 °F−40 °C to +85 °C

Packaging: 25 per pallet

Certifications

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

UL 61730IEC 61215IEC 61730IEC 61701IEC 62716Fire rating Type 1 (UL 61730)ISO 14001ISO 45001ISO 9001

UL 61730CEC listing
IEC 61215datasheet
IEC 61730datasheet
IEC 61701datasheet
IEC 62716datasheet
Fire rating Type 1 (UL 61730)datasheet
ISO 14001factory, datasheet
ISO 45001factory, datasheet
ISO 9001factory, datasheet

Warranty & degradation

LG Electronics datasheet

Product warranty25 years
Then≤ 0.25% / year
Year 25≥ 92.5%

Independent reliability testing

Kiwa PVEL Scorecard

2021

PVEL Top Performer

this series

Tests passed as Top Performer

LID+LETID

PVEL Scorecards

LG Electronics named Top Performer, 2018–2021

PVEL Top Performer tests

Year	Product	Tests
2021	LGxxxQ1C-A6	LID+LETID

Inverter compatibility & string sizing

LG Electronics 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

46.2 V

Voc when cold

per panel

31.2 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	2–12
Solis (Ginlong) S6-EH1P10K-H-US	600 V	80–520 V	datasheet	3–12
Solis (Ginlong) Solis-1P7.6K-4G-US	600 V	100–500 V	datasheet	4–12
Qcells Q.VOLT H7.6SX	498 V	234–498 V	CEC test window	8–10

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	46.2 / 31.2 V	✓ Within range	1.38
Enphase IQ8X-80-M-US	320–540 W	79.5 V	43–60 V	46.2 / 31.2 V	✗ Not a match: module voltage below MPPT range	1.05
APsystems (Alt Power System) DS3-L	265–570 W	60 V	28–45 V	46.2 / 31.2 V	✓ Within range	0.51
Enphase IQ8M-72-2-US	260–460 W	60 V	30–45 V	46.2 / 31.2 V	✓ Within range	1.23
Enphase IQ8A-72-2-US	295–500 W	60 V	32–45 V	46.2 / 31.2 V	⚠ Works; below MPPT at peak heat	1.15

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	670	12,067	6.08
Palmdale	1,835	734	13,212	6.69
Chula Vista	1,696	678	12,211	6.11
Huntington Beach	1,643	657	11,830	5.89
Riverside	1,696	678	12,211	6.21
Santa Clarita	1,724	690	12,413	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 400 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)
LG Electronics LG400Q1C-A6	400 W	≈22.1%	−0.310	43.8	11.32	product 2021	1
Qcells Q.PEAK DUO BLK ML-G10+ 400	400 W	≥20.4%	−0.362	45.3	11.14	product 2022, 2023	221
JA Solar JAM54S31-400/MR	400 W	≈21.1%	−0.329	37.07	13.79	product 2023, 2024	152
REC Group REC400AA Pure	400 W	≈22.3%	−0.256	48.8	10.25	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 LG Electronics LG400Q1C-A6?

Calculated from the panel area (1.81 m²): about 22.1% for the 400 W class. 400 W over 1.81 m² equals about 221 W per square meter.

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

PVWatts v8 with typical-year weather gives about 670 kWh per year per 400 W panel in Los Angeles and about 734 kWh in Palmdale (20° roof, facing south, 14% system losses).

How much power does it lose on a hot roof?

With γ = −0.29 %/°C, at a 77 °C cell temperature (hottest modeled hour in Palmdale) output is about 15% 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 = 46.2 V, Vmp at 74 °C cell = 31.2 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 46.2 V vs max input 60 V; Vmp when hot 31.2 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 92.5% after 25 years (manufacturer datasheet).

How big and heavy is it?

68.5 × 41 × 1.57 in (1,740 × 1,042 × 40 mm), 40.8 lb (18.5 kg).

Has this panel been reliability-tested?

LGxxxQ1C-A6 was a PVEL Top Performer in 2021 (LID+LETID).

Sources

California Energy Commission — Solar Equipment Lists, PV Module List, Inverter List (snapshot Oct 7, 2026).
LG Electronics — manufacturer datasheet “LG390Q1C-A6 LG NeON® R is powerful solar module that provides world-class”.
Qcells — manufacturer datasheet “Q.PEAK DUO BLK ML-G10+ ENDURING HIGH PERFORMANCE”.
Kiwa PVEL — PV Module Reliability Scorecard, Top Performer lists 2018–2021.
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 — Los Angeles County Public Works (EPIC-LA, unincorporated areas) (Dec 2021). Equipment matched from permit descriptions by model number.
Cali-Graf calculations — formulas and inputs are shown next to each calculated value (efficiency from area, temperature-corrected voltages, string sizing, energy estimates).