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Resun Solar RS9K615M
Resun Solar Brand review

RS9K615M

615 Wp Monocrystalline
ComparePV verdict

Solid all-round for its segment

Rank 3,481 of 14,005
Compare panels Datasheet PDF
Power (Wp)
615
Typical for its class
Efficiency (%)
21.73
Typical · median 22.28%
Density (Wp/m²)
217.3
Typical · median 222.6
Temp (%/°C)
-0.300
Typical · median -0.300
Weight (kg)
30.9
Typical · median 32.0 kg
Warranty (yrs)
30
Typical · median 30 yrs

The RS9K-M series from Resun Solar comprises monocrystalline 615-645W half-cell modules built with 18 busbars, engineered to maximize energy yield while minimizing internal losses. The multi-busbar technology distributes current more evenly across the cells, reducing the risk of failures caused by microcracks and broken busbars and extending the practical service life of the installation. Thanks to the half-cut cell design, the module offers strong resistance to hot-spot effects triggered by partial shading, making it a solid choice for installations exposed to uneven sunlight, such as near trees or chimneys. The panel also stands out for its PID resistance, which limits power degradation over time and contributes to a lower LCOE for the whole system. A 3.2 mm tempered glass with anti-reflective coating delivers better performance in low-light conditions, a relevant advantage under Poland's often overcast climate. Certified to withstand wind loads of 2400 Pa and snow loads of 5400 Pa, the construction is resistant to demanding mechanical conditions, including salt mist and ammonia exposure, making it suitable for roofs on farms and industrial buildings. The series is aimed at investors seeking a balance between performance, durability, and predictable operating costs.

Ranking

6,057 panels in the 515-715 W band, all technologies
Metric This panel Median Position in segment Overall rank
Module efficiency 21.73% 22.28% Typical 7,370
Power density 217.3 222.6 Typical 7,329
Temperature coefficient -0.300 -0.300 Typical 6,093
Weight per kWp 50.2 53.0 Typical 3,688
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 · 0 caution
Best for

Commercial, utility-scale and shaded-installations.

Notes from the database
  • At 21.7% efficiency, this panel is on par with typical database modules
  • At 217.3 W/m² power density, roof space requirements are typical for database panels
  • At -0.30%/°C, hot weather performance is typical for database panels
  • Weight of 30.9 kg is 4.4 kg above database median (26.5 kg) - verify structural support
  • Ranked #7370 out of 14005 panels for efficiency in the database

Specifications

Open datasheet PDF
Nominal power (Pmax) 615 Wp Nameplate at 1000 W/m², 25 °C
Module efficiency 21.73 % Typical Segment median 22.28%
Vmpp · Impp 36.00 V · 17.09 A Operating point at max power
Voc · Isc 42.90 V · 18.15 A Sizes the string length
Max system voltage 1500 V Longer strings than 1000 V modules
Dimensions 2172×1303×35 mm · 2.83 m² of roof
Weight 30.9 kg Typical Typical · median 32.0 kg
Cells 120 Monocrystalline
Coefficient Pmax -0.300 %/°C Typical median -0.300 of its segment
Coefficient Voc · Isc -0.250 · 0.045 %/°C
NOCT 45 °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
Degradation 0.50 % Per year after the first

Datasheet charts

Open datasheet PDF

Measured curves published by Resun Solar in this model's datasheet. A chart carrying a wattage was measured on that variant alone - only the ones that describe 615 Wp appear here. The rest cover the whole series.

0.5% Annual Degradation over 30 years 0.5% Annual Degradation over 30 years 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
-

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

Heat losses
-0.300 %/°C against a segment median of -0.300
-

Alternatives

All Resun Solar panels
Filter these
Size
Panel Power Eff. Temp. Weight Difference
Resun Solar RS9K615M 615 W 21.73% -0.300 30.9 kg You are here
AIKO-A650-MAE72Mw 650 W 25.20% -0.260 27.0 kg Cooler, lighter, +3.5 pp
AIKO-A645-MAE72Mw 645 W 25.00% -0.260 27.0 kg Cooler, lighter, +3.3 pp
AIKO-A640-MAE72Mw 640 W 24.80% -0.260 27.0 kg Cooler, lighter, +3.1 pp
LR8-66HVD-665M 665 W 24.62% -0.260 33.5 kg +50 W, cooler, +2.9 pp
JKM650-670N-66QL6-BDV (665W class) 665 W 24.62% -0.260 32.5 kg +50 W, cooler, +2.9 pp
HY665-B144DSS 665 W 24.62% -0.260 27.6 kg +50 W, cooler, +2.9 pp
SPDG665-BC132R12 665 W 24.62% -0.260 33.5 kg +50 W, cooler, +2.9 pp
RS9K-M-DG-610 610 W 21.55% -0.300 34.5 kg Heavier
RS9K-M-DG-620 620 W 21.91% -0.300 34.5 kg Heavier
RS9K-M-DG-625 625 W 22.08% -0.300 34.5 kg +10 W, heavier, +0.3 pp
RS9K-M-DG-630 630 W 22.26% -0.300 34.5 kg +15 W, heavier, +0.5 pp
RS9K-M-DG-635 635 W 22.44% -0.300 34.5 kg +20 W, heavier, +0.7 pp
GKA210N120 680 W 24.03% -0.340 28.0 kg +65 W, hotter, +2.3 pp
GKA210N120-675 675 W 23.85% -0.340 28.0 kg +60 W, hotter, +2.1 pp
QN-670HJT-01 670 W 23.70% -0.240 35.5 kg +55 W, cooler, +2.0 pp
GKA210N120-670 670 W 23.67% -0.340 28.0 kg +55 W, hotter, +1.9 pp

Found 497 panels of the same or similar size to this one, within ±10 mm. See them here Found 502 panels of the same or similar size to this one, within ±25 mm. See them here Found 502 panels of the same or similar size to this one, within ±50 mm. See them here Found 506 panels of the same or similar size to this one, within ±100 mm. See them here

Common questions

6 answered
What is the maximum power output of the Resun Solar RS9K-M series panel?
RS9K-M series panels reach up to 645 Wp. Built with monocrystalline half-cut cells and 18 busbars, these high-power modules are well suited for installations with limited roof space where maximizing energy yield per panel matters.
What warranty comes with Resun Solar RS9K-M panels?
The manufacturer provides a 15-year product warranty and a 30-year power output warranty. This covers both material and workmanship defects as well as gradual power degradation over time, giving a predictable operating cost for the entire lifespan of the installation.
Are RS9K-M panels bifacial?
No, the RS9K-M series consists of mono-facial panels. Energy is generated solely from the front side of the module. If you need extra yield from reflected light, for example on a light-colored roof or ground-mount system, consider a bifacial series from Resun Solar instead.
Are RS9K-M panels suitable for farm buildings or industrial roofs?
Yes, the frame is certified for wind loads up to 2400 Pa and snow loads up to 5400 Pa, and it also resists salt mist and ammonia corrosion. This makes the panels well suited to the demanding mechanical and chemical conditions typical of livestock buildings and industrial facilities.
How does the half-cut, 18-busbar technology in RS9K-M differ from standard panels?
Splitting cells into halves reduces current losses and improves resistance to hot-spot effects caused by partial shading, such as from trees or chimneys. The 18 busbars distribute current more evenly across the cells, lowering the risk of failures from microcracks and extending the system's real-world lifespan.
Do RS9K-M panels perform well in low-light conditions typical of a temperate climate?
Yes, the 3.2 mm tempered glass with anti-reflective coating improves performance under low irradiance, which matters in climates with many overcast days. Combined with PID resistance limiting power degradation over time, this contributes to a lower LCOE for the installation.
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