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Solarspace SSA-66HD-620N
Solarspace Brand review

SSA-66HD-620N

620 Wp N-type Bifacial 80%
ComparePV verdict

Solid all-round for its segment

Rank 2,098 of 14,005
Compare panels Datasheet PDF
Power (Wp)
620
Typical for its class
Efficiency (%)
22.95
Typical · median 22.77%
Density (Wp/m²)
229.5
Typical · median 227.7
Temp (%/°C)
-0.290
Typical · median -0.290
Weight (kg)
32.5
Typical · median 32.5 kg
Warranty (yrs)
30
Typical · median 30 yrs

The Solarspace Lumina II / SSA-66HD 595-625N series is designed to maximize energy yields under real-world operating conditions, particularly where long-term production stability is crucial. The use of N-type TOPCon cells helps minimize degradation-related losses and maintains high efficiency even under variable solar irradiance. These are bifacial modules in a dual glass configuration, allowing them to better utilize reflected light from the ground while also enhancing their durability in harsher environments (wind, humidity, mechanical stress). This translates to more predictable energy production and a reduced risk of power drops over time.

The Lumina II series also offers long-term performance, making it easier to plan the return on investment in commercial projects. The series is suitable for both large-scale PV farms and rooftops of warehouses, factories, and industrial buildings, where high power density and durability are essential. Thanks to its favorable performance at higher temperatures, the modules help maintain energy production even during the summer months, when many panels experience significant power losses due to overheating.

Ranking

359 panels in the segment N-type 600-650 W
Metric This panel Median Position in segment Overall rank
Module efficiency 22.95% 22.77% Typical 2,268
Power density 229.5 227.7 Typical 2,191
Temperature coefficient -0.290 -0.290 Typical 2,165
Weight per kWp 52.4 52.7 Typical 5,893
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 hot-climate.

Notes from the database
  • At 22.9% efficiency, this panel is on par with typical N-type 600-650W modules
  • At 229.5 W/m² power density, roof space requirements are typical for N-type 600-650W panels
  • Temperature coefficient of -0.29%/°C matches the N-type 600-650W median
  • Bifacial design (80% factor) captures reflected light - adds 4-12% yield on ground-mount or white roof
  • Ranked #2268 out of 14005 panels for efficiency in the database

Specifications

Open datasheet PDF
Nominal power (Pmax) 620 Wp Nameplate at 1000 W/m², 25 °C
Module efficiency 22.95 % Typical Segment median 22.77%
Vmpp · Impp 41.03 V · 15.12 A Operating point at max power
Voc · Isc 49.38 V · 15.98 A Sizes the string length
Max system voltage 1500 V Longer strings than 1000 V modules
Dimensions 2382×1134×30 mm · 2.70 m² of roof
Weight 32.5 kg Typical Typical · median 32.5 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 -0.260 · 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 542 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 620 Wp appear here. The rest cover the whole series.

30-Year Linear Power 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
-0.290 %/°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 SSA-66HD-620N 620 W 22.95% -0.290 32.5 kg You are here
AIKO-A650-MAE72Mw 650 W 25.20% -0.260 27.0 kg +30 W, lighter, +2.2 pp
AIKO-A645-MAE72Mw 645 W 25.00% -0.260 27.0 kg Cooler, lighter, +2.1 pp
AIKO-G670-MCH72Mw 670 W 24.80% -0.260 28.2 kg +50 W, lighter, +1.9 pp
LR7-72HVHF-670M 670 W 24.80% -0.260 28.5 kg +50 W, lighter, +1.9 pp
AIKO-A640-MAE72Mw 640 W 24.80% -0.260 27.0 kg Cooler, lighter, +1.9 pp
JKM650-670N-66QL6-BDV (670W class) 670 W 24.80% -0.260 32.5 kg +50 W, cooler, +1.9 pp
SSA-66HD-590N 590 W 21.84% -0.290 32.5 kg -30 W, -1.1 pp
SSA-66HD-595N 595 W 22.03% -0.290 32.5 kg -25 W, -0.9 pp
SSA-66HD-600N 600 W 22.21% -0.290 32.5 kg -20 W, -0.7 pp
SSA-66HD-605N 605 W 22.40% -0.290 32.5 kg -15 W, -0.6 pp
SSA-66HD-610N 610 W 22.58% -0.290 32.5 kg -10 W, -0.4 pp
SSA-66HD-615N 615 W 22.77% -0.290 32.5 kg Very close match
SSA-66HD-625N 625 W 23.14% -0.290 32.5 kg Very close match
AIKO-A680-MDE72Mw 680 W 25.20% -0.260 29.0 kg +60 W, lighter, +2.2 pp
AIKO-A675-MDE72Mw 675 W 25.00% -0.260 29.0 kg +55 W, lighter, +2.1 pp
AIKO-A700-MAE78Dw 700 W 25.00% -0.260 34.5 kg +80 W, cooler, +2.1 pp

Found 1119 panels of the same or similar size to this one, within ±10 mm. See them here Found 1125 panels of the same or similar size to this one, within ±25 mm. See them here Found 1236 panels of the same or similar size to this one, within ±50 mm. See them here Found 1917 panels of the same or similar size to this one, within ±100 mm. See them here

Common questions

6 answered
What warranty comes with the Solarspace Lumina II SSA-66HD 595-625N solar panels?
The Lumina II series is backed by a 15-year product warranty covering defects and workmanship, along with a 30-year linear power warranty guaranteeing at least 87.4% of rated output at end of term. This is one of the longer warranty packages in the commercial segment, making long-term yield modeling and ROI planning significantly more straightforward for large PV projects.
What is N-type TOPCon technology and why choose it over standard PERC?
N-type TOPCon cells deliver a lower degradation rate and smaller annual power losses compared to conventional PERC technology. The Lumina II modules feature a temperature coefficient of approximately -0.29%/°C, meaning less power loss on hot summer days. Over the full system lifetime this translates to higher energy yields and a more competitive LCOE when compared to previous-generation PERC-based modules.
Are the Solarspace Lumina II SSA-66HD panels suitable for industrial rooftop installations?
Yes, the Lumina II series is specifically designed for commercial and industrial applications. The 66-cell half-cut format (132 G12R cells) delivers up to 625 Wp of power density per module, while the dual glass construction improves mechanical resistance to wind, snow loads, and moisture ingress. These modules are well suited for flat or low-pitch rooftops on warehouses, logistics centers, and manufacturing facilities where durability and minimal maintenance are priorities.
Does bifacial dual glass make sense for a typical ground-mounted solar farm?
Absolutely. Bifacial panels generate additional electricity from light reflected off the ground surface. On light-colored gravel, white geomembrane, or snow, the bifacial gain typically adds 5-15% to annual energy production. The glass-glass (dual glass) construction also extends module service life and moisture resistance, which is a key advantage for ground-mounted systems exposed to harsh environmental conditions over several decades.
What are the dimensions and weight of the SSA-66HD 625N panels, and do they pose any installation challenges?
The SSA-66HD modules measure approximately 2382 x 1134 x 30 mm and weigh around 32.8 kg each. Dual glass modules are heavier than their backsheet counterparts, requiring a reinforced racking structure and at least two installers for safe handling and placement. This is a commercial-format module not recommended for standard residential rooftop installations.
Is Solarspace a Tier 1 manufacturer and does that affect project financing for Lumina II installations?
Yes, Solarspace holds Tier 1 status according to Bloomberg NEF and ranks among the top global solar cell shipment leaders. Tier 1 classification has a direct practical impact: most project finance banks and lending institutions accept these modules as eligible collateral for PV project loans, and insurers are more willing to cover installations using recognized Tier 1 equipment under standard commercial policies.
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