Skip to main content
Q-Cells Q.PEAK DUO BLK ML-G10+ 390
Q-Cells Brand review

Q.PEAK DUO BLK ML-G10+ 390

390 Wp PERC
ComparePV verdict

Strong in heat, no clear weak spot

Rank 11,364 of 14,129
Compare panels Datasheet PDF
Power (Wp)
390
Typical for its class
Efficiency (%)
19.90
Typical · median 19.90%
Density (Wp/m²)
198.6
Typical · median 199.0
Temp (%/°C)
-0.340
Strong · top 15%
Weight (kg)
22.0
Typical · median 21.4 kg
Warranty (yrs)
25
Typical · median 25 yrs

Q-Cells Q.PEAK DUO BLK ML-G10+ photovoltaic panels are an advanced solution that sets new standards in aesthetics and energy efficiency for residential rooftops. The key distinguishing feature of the series is the use of innovative Q.ANTUM DUO Z technology, which, thanks to gapless cell interconnection, allows for maximum utilization of the available module surface. As a result, the user receives a much higher power density, which is crucial for roofs with limited installation space. This series effectively addresses the issue of performance drops in less favorable weather conditions, offering excellent yields in low-light conditions and high temperature stability on hot days. The elegant, all-black design makes the installation almost invisible, harmoniously blending with the modern architecture of single-family homes. What sets these modules apart from competitors' offerings is primarily the rigorous Quality Controlled PV certificate issued by TÜV Rheinland, guaranteeing the highest mechanical durability and long-term resistance to degradation. By choosing this model, investors opt for half-cell technology with 12 busbars, which minimizes the risk of micro-cracks and ensures stable current flow. It is a product dedicated to the most demanding customers for whom energy security, a quick return on investment, and the uncompromising, prestigious appearance of the entire photovoltaic installation matter.

Ranking

579 panels in the segment PERC 350-400 W
Metric This panel Median Position in segment Overall rank
Module efficiency 19.90% 19.90% Typical 12,416
Power density 198.6 199.0 Typical 12,453
Temperature coefficient -0.340 -0.350 Strong · top 15% 8,846
Weight per kWp 56.4 55.8 Typical 10,727
Performance warranty 25 yrs 25 yrs Typical 9,912
Colour key Strong - top 25% Typical - middle 50% Weak - bottom 25%

Signals from the data

6 positive · 1 caution
Best for

Residential and shaded-installations.

Strengths
-0.340 %/°C temperature coefficient

Top 15% of the PERC 350-400 W segment, against a median of -0.350.

What owners get
Q.ANTUM DUO Z technology

Zero-gap layout of half-cut cells with 12 busbars maximizes module surface utilization, pushing efficiency up to 21.4% - important for roof-constrained residential installations.

Quality Controlled PV certification

Q-Cells was the first manufacturer worldwide to pass the 'Quality Controlled PV' program by TÜV Rheinland, covering extended durability and degradation-resistance testing beyond standard IEC norms.

Tier-1, 25 years in the market

Q-Cells (South Korea, founded 1999) is a Tier-1 bankable manufacturer, which eases project financing through banks and power-warranty insurance over the long term.

25-year product and power warranty

The manufacturer guarantees at least 86% of nominal power after 25 years of operation, matching peer comparables in the PERC segment, while offering a full 25-year product warranty - longer than many competitors' typical 10-12 year product coverage.

High mechanical durability

Aluminum alloy frame certified for snow loads up to 5400 Pa and wind loads up to 4000 Pa, making the series suitable for harsh climates including high-snowfall regions.

Trade-offs
Efficiency slightly below peers

Maximum efficiency of 21.4% trails comparable M10 PERC modules such as Jinko Solar JS-PERC (21.7%) and RedSolar P series (21.52%), despite matching the 420 Wp peak power ceiling.

Notes from the database
  • Efficiency of 19.9% matches the PERC 0-400W median
  • At 198.6 W/m² power density, this panel generates 4.4 W/m² more per unit area than PERC 0-400W median (194.2 W/m²)
  • Temperature coefficient of -0.34%/°C matches the PERC 0-400W median
  • At 22.0 kg (1.5 kg above PERC 0-400W median of 20.5 kg), requires checking roof load capacity
  • Ranked #12416 out of 14129 panels for efficiency in the database

Specifications

Open datasheet PDF
Nominal power (Pmax) 390 Wp Nameplate at 1000 W/m², 25 °C
Module efficiency 19.90 % Typical Segment median 19.90%
Vmpp · Impp 36.62 V · 10.65 A Operating point at max power
Voc · Isc 45.23 V · 11.07 A Sizes the string length
Max system voltage 1000 V Longer strings than 1000 V modules
Dimensions 1879×1045×32 mm · 1.96 m² of roof
Weight 22.0 kg Typical Typical · median 21.4 kg
Cells 132 · PERC Monocrystalline
Coefficient Pmax -0.340 %/°C Strong top 15% of its segment
Coefficient Voc · Isc -0.270 · 0.040 %/°C
NOCT 43 °C At 800 W/m², 20 °C ambient
Product warranty 25 years Hardware defects only
Performance warranty 25 years Typical median 25 yrs · median 25 yrs
End-of-warranty output 86.0 % Equals 326 W guaranteed
Degradation 2.00 → 0.50 % First year, then annual

Simulations

Live - change any input
Lifetime output & value
30 years at 1200 kWh/kWp/year and €0.50 per kWh
Power in year 30
-
Lifetime energy
-
Energy value
-

Degradation from this panel's own datasheet figures. No inverter, soiling or shading losses.

Heat losses
-0.340 %/°C against a segment median of -0.350
-
Filter these
Size
Panel Power Eff. Temp. Weight Difference
Q-Cells Q.PEAK DUO BLK ML-G10+ 390 390 W 19.90% -0.340 22.0 kg You are here
LX-440M/182-108+GG 440 W 23.07% -0.240 23.6 kg +50 W, cooler, +3.2 pp
GKA210M340W 340 W 23.00% - 16.2 kg -50 W, lighter, +3.1 pp
GKA210M360W 360 W 23.00% - 16.2 kg Lighter, +3.1 pp, +5 yr warranty
GKA210M380W (1/4*4*38) 380 W 23.00% - 17.1 kg Lighter, +3.1 pp, +5 yr warranty
GKA210M400W (1/2*4*20) 400 W 23.00% - 18.0 kg Lighter, +3.1 pp, +5 yr warranty
GKA210M400W (1/4*4*40) 400 W 23.00% - 18.0 kg Lighter, +3.1 pp, +5 yr warranty
GKA210M380W (1/2*4*19) 380 W 23.00% - 17.1 kg Lighter, +3.1 pp, +5 yr warranty
JT440SYK(B) 440 W 22.90% -0.240 23.0 kg +50 W, cooler, +3.0 pp
Q.PEAK DUO BLK ML-G10+ 385 385 W 19.60% -0.340 22.0 kg -0.3 pp
Q.PEAK DUO BLK ML-G10.a+ 395 395 W 20.10% -0.340 22.0 kg +0.2 pp
Q.PEAK DUO BLK ML-G10.a+ 400 400 W 20.40% -0.340 22.0 kg +10 W, +0.5 pp
Q.PEAK DUO BLK ML-G10.a+ 405 405 W 20.60% -0.340 22.0 kg +15 W, +0.7 pp
LR7-54HJD-510M 510 W 25.00% -0.240 23.5 kg +120 W, cooler, +5.1 pp
LR7-54HJD-505M 505 W 24.70% -0.240 23.5 kg +115 W, cooler, +4.8 pp
WST-505BKX54-A2 505 W 24.70% -0.260 25.0 kg +115 W, cooler, +4.8 pp
LR7-54HJD-500M 500 W 24.50% -0.240 23.5 kg +110 W, cooler, +4.6 pp

Found 18 panels of the same or similar size to this one, within ±10 mm. See them here Found 55 panels of the same or similar size to this one, within ±25 mm. See them here Found 105 panels of the same or similar size to this one, within ±50 mm. See them here Found 1934 panels of the same or similar size to this one, within ±100 mm. See them here

About the Q.PEAK DUO BLK ML-G10+ series

6 answered

These answers cover the whole series. Where a figure differs, the specification above is this module's own.

What is the Q.ANTUM DUO Z technology in the Q.PEAK DUO BLK ML-G10+ series and does it actually matter?
Q.ANTUM DUO Z combines half-cut PERC cells with a zero-gap cell layout and 12 busbars. The zero-gap arrangement maximizes the active surface area, pushing module efficiency up to 20.9%. Twelve busbars reduce internal resistance and the risk of micro-cracks. The practical result is higher power output per square meter of roof space and better long-term durability over the module's 25-year service life.
What warranty does the Q-Cells Q.PEAK DUO BLK ML-G10+ come with and what exactly does it cover?
The Q.PEAK DUO BLK ML-G10+ series carries a 25-year product warranty covering manufacturing defects and a 25-year linear power warranty guaranteeing at least 86% of nominal power output after 25 years. Both warranties are backed by TÜV Rheinland's Quality Controlled PV certification. Q-Cells, a Hanwha Group brand and Tier 1 manufacturer, provides the financial stability needed to honor long-term warranty obligations.
Will the Q.PEAK DUO BLK ML-G10+ 405 W panels perform well on a roof with partial shading from a chimney, dormers, or neighboring buildings?
Yes. The half-cut cell design splits the module into two independently operating halves, so shading on one half does not completely shut down the other. Twelve busbars further limit the impact of shading on individual cells. For installations with heavy, constant shading, pairing these modules with power optimizers or microinverters is advisable, but for typical residential shading scenarios the module significantly outperforms standard full-cell PERC modules.
How does the Q.PEAK DUO BLK ML-G10+ 405 W perform in summer when roof temperatures exceed 60°C?
All PV modules lose power as temperature rises, quantified by the power temperature coefficient. The Q.PEAK DUO BLK ML-G10+ has a coefficient of approximately -0.34%/°C, which is among the better values for PERC modules. On a hot day with cell temperatures around 65°C, the module delivers roughly 85-87% of its rated power - noticeably better than weaker modules. The half-cut architecture also reduces resistive losses at elevated temperatures.
Does the Q.PEAK DUO BLK ML-G10+ all-black series blend in with modern rooftops?
The BLK (all-black) series features black cells, a black anodized frame, and a black backsheet with no contrasting silver busbars, giving the installation a seamless, dark surface appearance nearly indistinguishable from dark roof tiles. It is one of the few premium modules combining high power output up to 405 W with a full all-black aesthetic, making it a popular choice for modern or minimalist residential architecture.
How do Q-Cells Q.PEAK DUO BLK ML-G10+ panels differ from cheaper PERC modules on the market?
Key differentiators are: first, the independent Quality Controlled PV certification from TÜV Rheinland covering mechanical durability and long-term degradation resistance - a standard many budget brands skip. Second, 12 busbars versus the typical 6-9 reduce micro-crack risk. Third, Q-Cells is a Tier 1 manufacturer with decades of production experience, making the 25-year warranty a credible commitment. The price premium typically pays off through lower degradation rates and higher energy yield over the module's full lifetime.
Add to compare