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Solarspace Brand review

SS9-60HD-635N

635 Wp N-type Bifacial 80%
ComparePV verdict

Solid all-round for its segment

Rank 2,166 of 14,005
Compare panels Datasheet PDF
Power (Wp)
635
Strong · top 22%
Efficiency (%)
22.41
Typical · median 22.77%
Density (Wp/m²)
224.4
Typical · median 227.7
Temp (%/°C)
-0.290
Typical · median -0.290
Weight (kg)
34.5
Typical · median 32.5 kg
Warranty (yrs)
30
Typical · median 30 yrs

The Solarspace SS9-60HD 625-650N (Lumina II) series is a range of modules designed for maximum energy production on limited space - particularly where every square meter of roof or mounting surface counts. The use of N-type cells allows for reduced power losses during operation and improves stability, which is a significant advantage in installations designed for long-term use. The design with half-cut cells is better at handling microcracks and reduces the impact of local shading, resulting in more predictable performance in urban and complex roof environments. In practice, it also features positive power tolerance, which makes it easier to achieve the desired performance of the entire string without unpleasant surprises during connection. This makes it a good choice for installers and investors seeking long-term warranty protection and high efficiency in C&I and larger micro-installations, where competitors often lose out due to their inconsistent and unstable performance parameters.

Ranking

359 panels in the segment N-type 600-650 W
Metric This panel Median Position in segment Overall rank
Module efficiency 22.41% 22.77% Typical 4,771
Power density 224.4 227.7 Typical 4,734
Temperature coefficient -0.290 -0.290 Typical 2,165
Weight per kWp 54.3 52.7 Typical 8,621
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 22.4% efficiency, this panel is on par with typical N-type 600-650W modules
  • Power density of 224.4 W/m² is 3.3 W/m² below N-type 600-650W median (227.7 W/m²) - needs more roof space
  • Temperature coefficient of -0.29%/°C matches the N-type 600-650W median
  • At 34.5 kg (2.0 kg above N-type 600-650W median of 32.5 kg), requires checking roof load capacity
  • Bifaciality factor of 80% can add 4-12% extra yield with reflective mounting surface

Specifications

Open datasheet PDF
Nominal power (Pmax) 635 Wp Nameplate at 1000 W/m², 25 °C
Module efficiency 22.41 % Typical Segment median 22.77%
Vmpp · Impp 36.79 V · 17.27 A Operating point at max power
Voc · Isc 43.91 V · 18.29 A Sizes the string length
Max system voltage 1500 V Longer strings than 1000 V modules
Dimensions 2172×1303×33 mm · 2.83 m² of roof
Weight 34.5 kg Typical Typical · median 32.5 kg
Cells 120 · 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 -0.260 · 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
End-of-warranty output 87.4 % Equals 555 W guaranteed
Degradation 1.00 → 0.40 % First year, then annual

Datasheet charts

Open datasheet PDF

Measured curves published by Solarspace in this model's datasheet. A chart carrying a wattage was measured on that variant alone - only the ones that describe 635 Wp appear here. The rest cover the whole series.

30-Year Linear Power Warranty Degradation Curve 30-Year Linear Power Warranty Degradation Curve Whole series I-V/P-V Curve at Different Irradiation (SS9-60HD-635N) I-V/P-V Curve at Different Irradiation (SS9-60HD-635N) Whole series I-V Curve at Different Temperature (SS9-60HD-635N) I-V Curve at Different Temperature (SS9-60HD-635N) 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
Solarspace SS9-60HD-635N 635 W 22.41% -0.290 34.5 kg You are here
AIKO-A650-MAE72Mw 650 W 25.20% -0.260 27.0 kg Cooler, lighter, +2.8 pp
AIKO-A680-MDE72Mw 680 W 25.20% -0.260 29.0 kg +45 W, lighter, +2.8 pp
AIKO-A675-MDE72Mw 675 W 25.00% -0.260 29.0 kg +40 W, lighter, +2.6 pp
AIKO-A645-MAE72Mw 645 W 25.00% -0.260 27.0 kg Cooler, lighter, +2.6 pp
AIKO-G670-MCH72Mw 670 W 24.80% -0.260 28.2 kg +35 W, lighter, +2.4 pp
LR7-72HVHF-670M 670 W 24.80% -0.260 28.5 kg +35 W, lighter, +2.4 pp
AIKO-A640-MAE72Mw 640 W 24.80% -0.260 27.0 kg Cooler, lighter, +2.4 pp
SS9-60HD-625N 625 W 22.08% -0.290 34.5 kg -10 W, -0.3 pp
SS9-60HD-630N 630 W 22.24% -0.290 34.5 kg Very close match
SS9-60HD-640N 640 W 22.58% -0.290 34.5 kg Very close match
SS9-60HD-645N 645 W 22.79% -0.290 34.5 kg +10 W, +0.4 pp
SS9-60HD-650N 650 W 22.97% -0.290 34.5 kg +15 W, +0.6 pp
GKA210N120 680 W 24.03% -0.340 28.0 kg Hotter, lighter, +1.6 pp
GKA210N120-675 675 W 23.85% -0.340 28.0 kg Hotter, lighter, +1.4 pp
QN-670HJT-01 670 W 23.70% -0.240 35.5 kg +35 W, cooler, +1.3 pp
GKA210N120-670 670 W 23.67% -0.340 28.0 kg Hotter, lighter, +1.3 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 warranties does the Solarspace SS9-60HD 625-650N (Lumina II) come with?
The Lumina II series carries a 15-year product warranty covering material and workmanship defects, along with a 30-year linear power warranty. After 30 years, the manufacturer guarantees at least 87.4% of the rated power output. This extended coverage makes the series particularly attractive when calculating ROI for commercial and large prosumer installations.
What is the maximum power output and efficiency of the Solarspace Lumina II panel?
The top variant of the SS9-60HD series is rated at 650 Wp with a module efficiency of approximately 22.65%. This is achieved through N-type cell technology and a 144 half-cut cell layout in a dual-glass configuration. The positive power tolerance guarantees the panel will meet or exceed its datasheet rating, which is important when calculating string-level yields.
Are the Solarspace SS9-60HD Lumina II panels bifacial, and does it make a difference on a standard rooftop?
Yes, the Lumina II series features bifacial dual-glass construction with a bifaciality factor of 80±5%. The rear-side energy gain is most significant on highly reflective surfaces such as gravel, concrete, or snow, and in ground-mount systems with tilt-adjustable racking. On a conventional dark sloped roof the gain is more modest, but still measurable and should be factored into the system design.
How do the Lumina II panels handle partial shading or complex roof layouts?
The half-cut cell design splits the module into two independent electrical circuits. Localized shading from a chimney, dormer, or antenna only reduces output in the affected segment without cutting off the entire panel. Combined with N-type cells, which inherently deliver a lower temperature coefficient and better low-light response, this results in more predictable energy yields throughout the year — especially on geometrically complex rooftops.
How does the N-type technology in the Lumina II series compare to older P-type modules?
N-type cells (TOPCon-based in this case) do not use boron doping, making them immune to LID and LeTID degradation — phenomena that can reduce P-type module power by several percent within the first months of operation. In practice, this means first-year degradation below 1%, better high-temperature performance, and a longer effective system lifespan compared to conventional PERC modules.
Are the Solarspace SS9-60HD 625-650N (Lumina II) panels suitable for commercial and industrial (C&I) projects?
Yes. High unit power output (up to 650 Wp), module efficiency above 22%, a 30-year linear power warranty, and certifications including IEC61215, IEC61730, IEC61701 (salt mist corrosion), and IEC62716 (ammonia) meet the requirements of industrial and commercial installations. As a Tier 1 manufacturer, Solarspace also facilitates project bankability for institutional financing.
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