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DMEGC Brand review

GH550M10T-B66HSW-C

550 Wp N-type Bifacial 80%
ComparePV verdict

Efficiency leader, no clear weak spot

Rank 4,164 of 14,005
Compare panels Datasheet PDF
Power (Wp)
550
Weak · bottom 2%
Efficiency (%)
23.16
Strong · top 2%
Density (Wp/m²)
231.6
Strong · top 2%
Temp (%/°C)
-0.290
Typical · median -0.290
Weight (kg)
30.0
Typical · median 29.5 kg
Warranty (yrs)
30
Typical · median 30 yrs

The DMEGC GHxxxM10T-B66HSW-C and GHxxxM10T-B66HST-C solar panel series is an advanced solution based on N-type TOPCon cell technology, which sets new efficiency standards in the Polish climate. These modules effectively eliminate the problem of rapid power degradation, offering users significantly higher long-term energy stability than traditional older-type cells. Thanks to the Double Glass design, the panels are characterized by exceptional resistance to extreme weather conditions, such as hail or strong wind, making them a reliable choice for modern residential and industrial installations. The use of bifacial technology in the HST version allows for the generation of additional energy from reflected radiation, which significantly increases total electricity production in open spaces. The innovative cell construction makes the modules work more efficiently in low-light conditions, solving the problem of low yields on cloudy days. This series was created for those who focus on maximum power density and component longevity. What distinguishes them from competing solutions is an excellent temperature coefficient, which guarantees high efficiency even during summer heatwaves, which, combined with a low degradation rate, ensures a safe and fast return on investment for investors.

Ranking

259 panels in the segment N-type 550-600 W
Metric This panel Median Position in segment Overall rank
Module efficiency 23.16% 22.45% Strong · top 2% 1,488
Power density 231.6 224.5 Strong · top 2% 1,464
Temperature coefficient -0.290 -0.290 Typical 2,165
Weight per kWp 54.5 52.3 Typical 8,867
Performance warranty 30 yrs 30 yrs Typical 21
Colour key Strong - top 25% Typical - middle 50% Weak - bottom 25%

Signals from the data

2 positive · 0 caution
Best for

Agrivoltaic, commercial and hot-climate.

Strengths
23.16% module efficiency

Top 2% of the N-type 550-600 W segment, against a median of 22.45%. Ranked 1,488th in the whole database.

231.6 watts per square metre

Top 2% of the N-type 550-600 W segment, against a median of 224.5. Ranked 1,464th in the whole database.

Notes from the database
  • 23.2% module efficiency - 0.7pp better than the N-type 550-600W median of 22.4%
  • 231.6 W/m² power density - 7.1 W/m² more than N-type 550-600W median (224.5 W/m²), more power per roof area
  • Temperature coefficient of -0.29%/°C matches the N-type 550-600W median
  • Bifaciality factor of 80% can add 4-12% extra yield with reflective mounting surface
  • Ranked #1488 out of 14005 panels for efficiency in the database

Specifications

Open datasheet PDF
Nominal power (Pmax) 550 Wp Nameplate at 1000 W/m², 25 °C
Module efficiency 23.16 % Strong Segment median 22.45%
Vmpp · Impp 40.18 V · 13.69 A Operating point at max power
Voc · Isc 48.00 V · 14.44 A Sizes the string length
Max system voltage 1500 V Longer strings than 1000 V modules
Dimensions 2094×1134×25 mm · 2.37 m² of roof
Weight 30.0 kg Typical Typical · median 29.5 kg
Cells 132 · N-type Monocrystalline
Bifaciality 80 % Rear output as a share of front
Coefficient Pmax -0.290 %/°C Typical median -0.290 of its segment
Coefficient Voc · Isc -0.250 · 0.048 %/°C
NOCT 42 °C At 800 W/m², 20 °C ambient
Product warranty 15 years Hardware defects only
Performance warranty 30 years Typical median 30 yrs · median 30 yrs
End-of-warranty output 87.4 % Equals 481 W guaranteed
Degradation 1.00 → 0.40 % First year, then annual

Datasheet charts

Open datasheet PDF

Measured curves published by DMEGC in this model's datasheet. A chart carrying a wattage was measured on that variant alone - only the ones that describe 550 Wp appear here. The rest cover the whole series.

15 Years Product Warranty / 30 Years Peak Power Warranty 15 Years Product Warranty / 30 Years Peak Power Warranty Whole series

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
-
With bifacial gain
-

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

Heat losses
-0.290 %/°C against a segment median of -0.290
-
Bifacial gain
Rear gain over light concrete: -
-

Model: bifaciality × albedo × 0.6 view factor. A first-order estimate, not a yield simulation.

Filter these
Size
Panel Power Eff. Temp. Weight Difference
DMEGC GH550M10T-B66HSW-C 550 W 23.16% -0.290 30.0 kg You are here
LR7-54HJD-510M 510 W 25.00% -0.240 23.5 kg Cooler, lighter, +1.8 pp
LR7-60HVH-560M 560 W 24.80% -0.260 25.0 kg Cooler, lighter, +1.6 pp
LR7-54HJD-505M 505 W 24.70% -0.240 23.5 kg Cooler, lighter, +1.5 pp
LR7-60HVH-555M 555 W 24.60% -0.260 25.0 kg Cooler, lighter, +1.4 pp
LR7-54HJD-500M 500 W 24.50% -0.240 23.5 kg -50 W, lighter, +1.3 pp
GH350M10T-B44HST-C 350 W 14.74% -0.290 29.0 kg -200 W, lighter, -8.4 pp
GH355M10T-B44HST-C 355 W 14.95% -0.290 29.0 kg -195 W, lighter, -8.2 pp
GH360M10T-B44HST-C 360 W 15.16% -0.290 29.0 kg -190 W, lighter, -8.0 pp
GH365M10T-B44HST-C 365 W 15.37% -0.290 29.0 kg -185 W, lighter, -7.8 pp
GH535M10T-B66HSW-C 535 W 22.53% -0.290 30.0 kg -15 W, -0.6 pp
GH540M10T-B66HSW-C 540 W 22.74% -0.290 30.0 kg -10 W, -0.4 pp
GH545M10T-B66HST-C 545 W 22.95% -0.290 30.0 kg -0.2 pp
GKA120N-PRO-590W 590 W 23.82% -0.300 26.7 kg +40 W, lighter, +0.7 pp
GKA120N-PRO-585W 585 W 23.62% -0.300 26.7 kg +35 W, lighter, +0.5 pp
BGO 580 580 W 23.50% -0.290 26.0 kg +30 W, lighter, +0.3 pp
GKA120N-PRO-580W 580 W 23.42% -0.300 26.7 kg +30 W, lighter, +0.3 pp

Found 397 panels of the same or similar size to this one, within ±10 mm. See them here Found 408 panels of the same or similar size to this one, within ±25 mm. See them here Found 425 panels of the same or similar size to this one, within ±50 mm. See them here Found 953 panels of the same or similar size to this one, within ±100 mm. See them here

Common questions

6 answered
What is the difference between the GHxxxM10T-B66HSW-C and GHxxxM10T-B66HST-C versions?
Both versions of this series use N-type TOPCon technology and a Double Glass construction, but they differ in the way they generate energy. The HSW-C version is a monofacial panel that captures energy exclusively from the front surface. The HST-C version is bifacial, meaning it can also absorb irradiance reflected from the ground, delivering a real-world energy yield gain of 10–25% under suitable installation conditions — for example, in open areas or above light-colored surfaces.
What warranty is offered on the DMEGC GHxxxM10T-B66HSW-C / HST-C series panels?
DMEGC provides a 15-year product warranty (covering material and workmanship defects) and a 30-year linear power output warranty for this series. This means that after 30 years of operation the panel should retain at least 87.4% of its rated initial power. Such an extended power warranty is standard for N-type TOPCon cells and confirms the high quality of modules from a Bloomberg NEF Tier-1 manufacturer.
Is the DMEGC GHxxxM10T series suitable for agrivoltaic installations and greenhouses?
Yes. The GH designation in the series name stands for Agri & Greenhouse. The Double Glass (glass-glass) construction, in place of a conventional backsheet, provides better light transmittance, and superior resistance to moisture and ammonia — both critical in agricultural environments. The panels perform well in agrivoltaic systems installed above crops as well as on greenhouse roofs, combining energy generation with protection of plants from excessive solar radiation.
How does the DMEGC GHxxxM10T series perform during heat waves in Poland?
N-type TOPCon cells have a more favorable temperature coefficient than older PERC cells. This means that for each degree Celsius rise in module temperature, they lose less power output, resulting in higher energy yields on hot summer days. In practice, during Polish heat waves this series maintains noticeably higher efficiency than typical P-type modules, which has a direct positive impact on the annual energy production of the system.
Do the DMEGC GHxxxM10T-B66HSW-C / HST-C panels perform efficiently on overcast days?
Yes. One of the key advantages of N-type TOPCon technology is superior low-light performance compared to older-generation cells. The panels respond more effectively to diffuse irradiance, which predominates on cloudy days typical of the Polish climate. As a result, the annual energy yield from these modules is higher than STC-based figures alone would suggest, which is particularly significant in regions with high cloud cover.
Is the DMEGC GHxxxM10T-B66HSW-C / HST-C series still available for purchase?
No. The GHxxxM10T-B66HSW-C and GHxxxM10T-B66HST-C series has been discontinued and is no longer actively offered by distributors. Any remaining units may appear only as residual stock with select suppliers. If you require similar specifications — N-type TOPCon technology, Double Glass construction, and power output up to 550 W — it is worth contacting a DMEGC distributor to inquire about the current successor model for this series.
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