39.4″ · 1,000 mm wide · 1.26″ (32 mm) frame · 41.4 lb (18.8 kg)

Solar panelQcells

Qcells Q.PEAK BLK-G4.1 295

Name: Qcells Q.PEAK BLK-G4.1 295
Brand: Qcells

60 cells (6 × 10). Power classes 285–305 W in the CEC list.

CEC listed · Aug 1, 2017UL 1703

Power class

Power (STC)295 WCEC nameplate
Efficiency≈17.7%calculated from area
%/°C Pmax−0.39CEC test: −0.392
PTC / STC91.7%PTC 271 W (CEC)

Power classes

CEC PV Module List (Oct 7, 2026) · Cali-Graf calculation · 5 models

Model	Pmax	Voc, V	Isc, A	Vmp, V	Imp, A	Efficiency	PTC	CEC listed
Q.PEAK BLK-G4.1 285	285 W	38.91	9.56	31.73	8.98	≈17.1%	261 W	—
Q.PEAK BLK-G4.1 290	290 W	38.19	9.63	31.96	9.07	≈17.4%	266 W	Sep 1, 2017
Q.PEAK BLK-G4.1 295	295 W	39.48	9.70	32.19	9.17	≈17.7%	271 W	Sep 1, 2017
Q.PEAK BLK-G4.1 300	300 W	39.76	9.77	32.41	9.26	≈18.0%	275 W	Aug 1, 2017
Q.PEAK BLK-G4.1 305	305 W	40.05	9.84	32.62	9.35	≈18.3%	281 W	Feb 3, 2020

≈ efficiency = Pmax ÷ panel area 1.67 m² (datasheet size).

CEC note: Formerly listed under Hanwha Q CELLS

Build & dimensions

Qcells datasheet · Cali-Graf calculation

Dimensions65.7 × 39.4 × 1.26 in1,670 × 1,000 × 32 mm
Module area1.67 m² (18 ft²)length × width
Weight41.4 lb (18.8 kg)
Cells60 cells (6 × 10)
Front glass3.2 mm thermally pre-stressed glass with
Back coverComposite film
FrameBlack anodised aluminium
Junction box66–77 mm × 115–90 mm × 15–19 mm
Cable / connector4 mm² Solar cable; (+) 1000 mm, (-) 1000 mm · Multi-Contact, MC4, IP65 and IP68

Heat & cold behaviour

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

	Datasheet	CEC listing test
Pmax coefficient γ	−0.39 %/°C	−0.392 %/°C
Voc coefficient β	−0.28 %/°C	−0.288 %/°C
Isc coefficient α	+0.04 %/°C	+0.039 %/°C
Vmp coefficient	—	−0.386 %/°C
Operating cell temperature	NMOT 45 °C	NOCT 46 °C

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
285 W	210.7 W	29.26 V × 7.2 A	56.1 W	98%
290 W	209.8 W	29.52 V × 7.11 A	55.8 W	96%
295 W	209.8 W	29.52 V × 7.11 A	55.8 W	95%
300 W	209.8 W	29.52 V × 7.11 A	55.8 W	93%
305 W	218.6 W	30.43 V × 7.18 A	57.3 W	94%

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

Electrical & strength ratings

Max system voltage1,000 V
Max reverse current20 A
Module temperature−40 °F to +185 °F−40 °C to +85 °C

Certifications

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

UL 1703IEC 61215IEC 61730

UL 1703CEC listing
IEC 61215datasheet
IEC 61730datasheet

Warranty & degradation

Qcells datasheet

Product warranty12 years

Independent reliability testing

Kiwa PVEL Scorecard · RETC PV Module Index

PVEL Scorecards

Qcells named Top Performer, 2016–2026

2023, 2026

RETC Overall Highest Achiever

Qcells, manufacturer level

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

RETC PV Module Index — Qcells

Year	Recognition
2023	Overall Highest Achiever; High Achievement in Performance (Module efficiency, Pan file performance); High Achievement in Reliability (Damp heat test, Pid resistance, Thermal cycle test)
2024	High Achievement in Performance
2025	Performance High Achiever
2026	Overall Highest Achiever; High achievement in performance; High achievement in reliability; Performance discipline high achiever (Conversion efficiency, Iam, Letid, Lid, PTC-to-STC, Temperature coefficient); Quality discipline high achiever (BOM verification); Reliability discipline high achiever (Sdml, Tc, Uvid, Budt, Damp heat, Hdt, Pid)

Inverter compatibility & string sizing

Qcells datasheet · CEC PV Module List (Oct 7, 2026) · NLR PVWatts v8 · inverter datasheets · NLR SAM inverter library · CEC Grid Support Inverter List (Oct 7, 2026)

CityColdest air, °CHottest cell, °CString inverter

42 V

Voc when cold

per panel

26.1 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	3–14
Solis (Ginlong) S6-EH1P10K-H-US	600 V	80–520 V	datasheet	4–14
Solis (Ginlong) Solis-1P7.6K-4G-US	600 V	100–500 V	datasheet	4–14
Qcells Q.VOLT H7.6SX	498 V	234–498 V	CEC test window	9–11

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	42 / 26.1 V	⚠ Works; below MPPT at peak heat	1.02
APsystems (Alt Power System) DS3-L	265–570 W	60 V	28–45 V	42 / 26.1 V	⚠ Works; below MPPT at peak heat	0.38
Enphase IQ8M-72-2-US	260–460 W	60 V	30–45 V	42 / 26.1 V	⚠ Works; below MPPT at peak heat	0.91
Enphase IQ8A-72-2-US	295–500 W	60 V	32–45 V	42 / 26.1 V	⚠ Works; below MPPT at peak heat	0.85

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	494	11,866	6.08
Palmdale	1,835	541	12,992	6.69
Chula Vista	1,696	500	12,008	6.11
Huntington Beach	1,643	485	11,632	5.89
Riverside	1,696	500	12,008	6.21
Santa Clarita	1,724	509	12,206	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 295 W panels

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

Panel	Pmax	Efficiency	γ Pmax (CEC)	Voc, V	Isc, A	Size	PVEL (product / brand)	SoCal permits (series)
Qcells Q.PEAK BLK-G4.1 295	295 W	≈17.7%	−0.392	39.48	9.7	65.7 × 39.4 in	brand 11×	—
REC Group REC295NP	295 W	≈18.2%	−0.351	39.4	9.76	—	brand 9× (2016–2025)	4
Silfab Solar SIL295NL	295 W	≈17.4%	−0.379	40	9.61	66.9 × 39.4 in	brand 7× (2017–2025)	2
Mission Solar Energy MSE300TS60	300 W	≈17.9%	−0.403	40	9.83	65.9 × 39.4 in	brand 2× (2024–2025)	1

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 Qcells

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

ManufacturerQcells
Listed in CEC asHanwha Qcells (Qidong) Co. Ltd., Qcells North America
Parent companyHanwha
Websiteq-cells.com
PVEL Top Performer (manufacturer)11 Scorecards (2016–2026)
RETC PV Module Index2023, 2024, 2025, 2026
Current panel series in CEC list81

Other series by SoCal permits

Q.PEAK DUO BLK ML-G10+ · 221Q.PEAK DUO BLK ML-G10.C+ · 124Q.TRON BLK M-G2+ · 40Q.TRON BLK M-G2.H+ · 33Q.TRON BLK M-G2.C+ · 24Q.TRON M-G2+ · 20

Questions & answers

How efficient is the Qcells Q.PEAK BLK-G4.1 295?

Calculated from the panel area (1.67 m²): about 17.7% for the 295 W class. 295 W over 1.67 m² equals about 177 W per square meter.

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

PVWatts v8 with typical-year weather gives about 494 kWh per year per 295 W panel in Los Angeles and about 541 kWh in Palmdale (20° roof, facing south, 14% system losses).

How much power does it lose on a hot roof?

With γ = −0.39 %/°C, at a 77 °C cell temperature (hottest modeled hour in Palmdale) output is about 20.2% 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 3–14 panels per string (Voc at 2 °C = 42 V, Vmp at 74 °C cell = 26.1 V). Final design must follow the inverter manual and NEC 690.7.

What does the warranty cover?

12 years on the product (manufacturer datasheet).

How big and heavy is it?

65.7 × 39.4 × 1.26 in (1,670 × 1,000 × 32 mm), 41.4 lb (18.8 kg).

Has this panel been reliability-tested?

This exact series is not in published PVEL Top Performer tables; Qcells was named a Top Performer in 11 Scorecards (2016–2026). RETC named Qcells Overall Highest Achiever in 2023, 2026.

Sources

California Energy Commission — Solar Equipment Lists, PV Module List, Inverter List (snapshot Oct 7, 2026).
Qcells — manufacturer datasheet “Q.PEAK BLK-G4.1 285-295 Q.ANTUM SOLAR MODULE The new high-performance module Q.PEAK BLK-G4.1 is the ideal solu-”.
Silfab Solar — datasheet SIL-310 NL BAA JUST ARRA -IN-.
Mission Solar Energy — datasheet PERC-60-305-310-1.
Kiwa PVEL — PV Module Reliability Scorecard, Top Performer lists 2016–2026.
RETC — PV Module Index reports 2023–2026.
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).