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Sunket New Energy Brand review

SKT685M12-132D5

685 Wp HJT Bifacial 77%
ComparePV verdict

Middle of its segment, heavy for its output

Rank 1,418 of 14,005
Compare panels Datasheet PDF
Power (Wp)
685
Typical for its class
Efficiency (%)
22.10
Typical · median 22.20%
Density (Wp/m²)
220.5
Typical · median 222.1
Temp (%/°C)
-0.260
Weak · bottom 24%
Weight (kg)
38.7
Weak · bottom 22%
Warranty (yrs)
30
Typical · median 30 yrs

The SKT680-700M12-132D5 solar panel series is an advanced solution based on M12 large-format silicon cells measuring 210 mm, which sets new efficiency standards in large-scale installations. The use of a bifacial double glass design allows for efficient energy generation from both sides of the module, significantly increasing yield in difficult ground conditions and on surfaces with high light reflectance. Thanks to the use of half-cut cell technology and multi-busbar connections, these modules minimize resistive losses and demonstrate excellent resistance to micro-cracks. For investors, the key benefit is BOS system cost optimization, as the high unit power of up to 700W allows for the installation of fewer structures and less cabling while maintaining the target power plant capacity. This solution effectively addresses the problem of limited space, offering the highest power density while maintaining a favorable temperature coefficient. This series is primarily dedicated to commercial solar farms and large industrial installations, where the priority is maximizing return on investment and long-term component reliability. It is distinguished from market competition by exceptional stability of operating parameters and reduced degradation, guaranteeing trouble-free and predictable power production for many years.

Ranking

61 panels in the segment HJT 650-700 W
Metric This panel Median Position in segment Overall rank
Module efficiency 22.10% 22.20% Typical 6,012
Power density 220.5 222.1 Typical 6,208
Temperature coefficient -0.260 -0.240 Weak · bottom 24% 511
Weight per kWp 56.5 55.7 Weak · bottom 22% 10,682
Performance warranty 30 yrs 30 yrs Typical 21
Colour key Strong - top 25% Typical - middle 50% Weak - bottom 25%

Signals from the data

0 positive · 2 caution
Best for

Utility-scale, commercial, shaded-installations and hot-climate.

Not ideal for

Weight-limited structures and hot climates.

Watch-outs
56.5 kg per kWp

Bottom 22% of the HJT 650-700 W segment, against a median of 55.7.

-0.260 %/°C temperature coefficient

Bottom 24% of the HJT 650-700 W segment, against a median of -0.240.

Notes from the database
  • At 22.1% efficiency, this panel is on par with typical HJT 650-700W modules
  • At 220.5 W/m² power density, roof space requirements are typical for HJT 650-700W panels
  • Temperature coefficient of -0.26%/°C is 0.02pp worse than HJT 650-700W median (-0.24%/°C) - higher losses in summer heat
  • 77% bifaciality enables rear-side power generation, boosting yield by 4-12% on reflective surfaces
  • #6012 for efficiency, #511 for temperature performance out of 14005 panels

Specifications

Open datasheet PDF
Nominal power (Pmax) 685 Wp Nameplate at 1000 W/m², 25 °C
Module efficiency 22.10 % Typical Segment median 22.20%
Vmpp · Impp 41.65 V · 16.45 A Operating point at max power
Voc · Isc 49.66 V · 17.25 A Sizes the string length
Max system voltage 1500 V Longer strings than 1000 V modules
Dimensions 2384×1303×35 mm · 3.11 m² of roof
Weight 38.7 kg Weak Weak · bottom 22%
Cells 132 · HJT Monocrystalline
Bifaciality 77 % Rear output as a share of front
Coefficient Pmax -0.260 %/°C Weak bottom 24% of its segment
Coefficient Voc · Isc -0.240 · 0.040 %/°C
NOCT 44 °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 88.0 % Equals 603 W guaranteed
Degradation 1.00 → 0.38 % First year, then annual

Datasheet charts

Open datasheet PDF

Measured curves published by Sunket New Energy in this model's datasheet. A chart carrying a wattage was measured on that variant alone - only the ones that describe 685 Wp appear here. The rest cover the whole series.

Sunket HJT Linear Warranty (30-Year Linear Power Warranty) Sunket HJT Linear Warranty (30-Year Linear 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
-0.260 %/°C against a segment median of -0.240
-
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
Sunket New Energy SKT685M12-132D5 685 W 22.10% -0.260 38.7 kg You are here
AIKO-A650-MAE72Mw 650 W 25.20% -0.260 27.0 kg -35 W, lighter, +3.1 pp
AIKO-A680-MDE72Mw 680 W 25.20% -0.260 29.0 kg Lighter, +3.1 pp
AIKO-A675-MDE72Mw 675 W 25.00% -0.260 29.0 kg -10 W, lighter, +2.9 pp
AIKO-A645-MAE72Mw 645 W 25.00% -0.260 27.0 kg -40 W, lighter, +2.9 pp
AIKO-A700-MAE78Dw 700 W 25.00% -0.260 34.5 kg +15 W, lighter, +2.9 pp
AIKO-A695-MAE78Dw 695 W 24.90% -0.260 34.5 kg +10 W, lighter, +2.8 pp
AIKO-G670-MCH72Mw 670 W 24.80% -0.260 28.2 kg -15 W, lighter, +2.7 pp
SKT680M12-132D5 680 W 21.90% -0.260 38.7 kg -0.2 pp
SKT690M12-132D5 690 W 22.20% -0.260 38.7 kg Very close match
SKT695M12-132D5 695 W 22.40% -0.260 38.7 kg +10 W, +0.3 pp
SKT700M12-132D5 700 W 22.50% -0.260 38.7 kg +15 W, +0.4 pp
AIKO-A805-GRH78Dw 805 W 25.10% -0.260 39.8 kg +120 W, heavier, +3.0 pp
AIKO-A800-GRH78Dw 800 W 24.90% -0.260 39.8 kg +115 W, heavier, +2.8 pp
AIKO-A795-GRH78Dw 795 W 24.80% -0.260 39.8 kg +110 W, heavier, +2.7 pp
AIKO-A790-GRH78Dw 790 W 24.60% -0.260 39.8 kg +105 W, heavier, +2.5 pp
TSM-NEG21C.20Q-760 760 W 24.50% -0.260 38.3 kg +75 W, +2.4 pp

Found 1390 panels of the same or similar size to this one, within ±10 mm. See them here Found 1400 panels of the same or similar size to this one, within ±25 mm. See them here Found 1400 panels of the same or similar size to this one, within ±50 mm. See them here Found 1432 panels of the same or similar size to this one, within ±100 mm. See them here

Common questions

6 answered
What warranty does the Sunket SKT680~700M12-132D5 series come with?
The SKT680~700M12-132D5 series carries a 15-year product warranty covering material and manufacturing defects. Sunket also provides a 30-year linear power warranty guaranteeing a minimum of 88% of rated output after three full decades of operation. This is one of the longer warranty schedules available in the commercial large-format module segment.
What is HJT technology used in the SKT680~700M12-132D5, and how does it compare to PERC?
HJT (Heterojunction Technology) is an N-type cell architecture that sandwiches a crystalline silicon wafer between thin amorphous silicon layers. Compared to standard PERC, it delivers higher module efficiency — 21.9–22.5% for this series — a better temperature coefficient that reduces power losses on hot days, and the complete absence of LID (Light Induced Degradation). The result is more stable and predictable energy output throughout the module's service life.
Do the SKT680~700M12-132D5 panels perform well during summer heat?
Yes. HJT technology offers a more favorable temperature coefficient than conventional PERC cells, meaning the SKT680~700M12-132D5 loses less output per degree Celsius of cell temperature rise. For commercial solar farms across Central Europe, this translates into higher energy yield during peak summer months and directly contributes to a lower LCOE over the project lifetime.
What advantage does the bifacial double glass construction of the SKT680~700M12-132D5 provide?
The bifacial design allows the module's rear side to harvest irradiance reflected from the ground surface. On ground-mounted installations with light-colored gravel or snow cover, rear-side power gain typically ranges from 5 to 15%. The dual-glass encapsulation — replacing a conventional backsheet — also improves resistance to moisture ingress, ammonia, and UV degradation, extending real-world service life beyond the stated 30-year power warranty period.
Is the SKT680~700M12-132D5 series suitable for residential rooftop installations?
The SKT680~700M12-132D5 is engineered for commercial solar farms and large industrial installations. At 2384 × 1303 mm and approximately 38.7 kg per module, on-roof handling is logistically demanding and may require reinforced racking structures not found in standard residential systems. Homeowners planning a prosumer installation would be better served by a smaller module from Sunket's lineup or another manufacturer.
What module efficiency does the Sunket SKT700M12-132D5 achieve, and how does it reduce BoS costs?
The SKT700M12-132D5 modules achieve efficiency in the 21.9–22.5% range, placing them among the top-tier commercially available large-format modules. With peak power up to 700W, fewer modules, mounting structures, and cable runs are needed to reach a target plant capacity. The resulting BoS cost optimization is especially significant for investors developing utility-scale projects above 1 MWp.
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