Skip to main content
Solarspace Brand review

SS8-54HDB-425N

425 Wp N-type Bifacial 80%
ComparePV verdict

Middle of its segment, heavy for its output

Rank 9,980 of 14,005
Compare panels Datasheet PDF
Power (Wp)
425
Typical for its class
Efficiency (%)
21.76
Typical · median 21.91%
Density (Wp/m²)
217.6
Typical · median 218.3
Temp (%/°C)
-0.290
Typical · median -0.290
Weight (kg)
24.0
Weak · 2.0 kg above median
Warranty (yrs)
30
Typical · median 30 yrs

The Solarspace Lumina II SS8-54HDB 420-440N series are all-black modules designed for installations where both aesthetics and stable energy yield are important. The use of N-type TOPCon cells results in excellent performance at high temperatures and significantly reduced susceptibility to typical early degradation mechanisms, which makes it easier to maintain predictable production over the years. In practice, this means fewer disappointments during seasons with lower sunlight and better long-term profitability.

Compared to the competition, these modules stand out due to their all-black aesthetic without compromising on performance parameters, as well as their carefully designed construction focused on durability. This is further enhanced by resistance to microcracks, thanks to solutions that minimize losses and the risk of hot spots during daily operation. This makes them a good choice for single-family homes, modern premium roofs, as well as small commercial installations, where visual appeal and high operational reliability are important. An additional advantage is the long power warranty, which supports the certainty of the investment.

Ranking

321 panels in the segment N-type 400-450 W
Metric This panel Median Position in segment Overall rank
Module efficiency 21.76% 21.91% Typical 7,285
Power density 217.6 218.3 Typical 7,172
Temperature coefficient -0.290 -0.290 Typical 2,165
Weight per kWp 56.5 51.2 Weak · bottom 14% 10,661
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 · 1 caution
Best for

Residential and commercial.

Not ideal for

Weight-limited structures.

Watch-outs
56.5 kg per kWp

Bottom 14% of the N-type 400-450 W segment, against a median of 51.2.

Notes from the database
  • Efficiency of 21.8% matches the N-type 400-450W median
  • At 217.6 W/m² power density, roof space requirements are typical for N-type 400-450W panels
  • At -0.29%/°C, hot weather performance is typical for N-type 400-450W panels
  • At 24.0 kg (2.0 kg above N-type 400-450W median of 22.0 kg), requires checking roof load capacity
  • Bifacial design (80% factor) captures reflected light - adds 4-12% yield on ground-mount or white roof

Specifications

Open datasheet PDF
Nominal power (Pmax) 425 Wp Nameplate at 1000 W/m², 25 °C
Module efficiency 21.76 % Typical Segment median 21.91%
Vmpp · Impp 32.03 V · 13.28 A Operating point at max power
Voc · Isc 38.08 V · 14.07 A Sizes the string length
Max system voltage 1500 V Longer strings than 1000 V modules
Dimensions 1722×1134×30 mm · 1.95 m² of roof
Weight 24.0 kg Weak Weak · 2.0 kg above median
Cells 108 · 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 371 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 425 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

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 SS8-54HDB-425N 425 W 21.76% -0.290 24.0 kg You are here
SPR-MAX7-475 475 W 24.00% -0.270 21.1 kg +50 W, +2.2 pp, +10 yr warranty
JST-EDMH-(445-465)W-TD (465W class) 465 W 23.81% -0.300 20.5 kg +40 W, lighter, +2.0 pp
JAT54S40-475/LR 475 W 23.80% -0.260 19.3 kg +50 W, lighter, +2.0 pp
TWMNH-48HW475 475 W 23.80% -0.280 23.7 kg +50 W, +2.0 pp
CHSM48RN(DG)/F-BH-475 475 W 23.80% -0.290 24.5 kg +50 W, +2.0 pp
AIKO-A475-MCE54Mw 475 W 23.80% -0.260 21.0 kg +50 W, lighter, +2.0 pp
AIKO-A475-MAH54Mw 475 W 23.80% -0.260 21.5 kg +50 W, cooler, +2.0 pp
SS8-54HSB-395M 395 W 20.23% -0.335 21.0 kg Hotter, -1.5 pp, -5 yr warranty
SS8-54HSB-400M 400 W 20.48% -0.335 21.0 kg Hotter, -1.3 pp, -5 yr warranty
SS8-54HSB-405M 405 W 20.74% -0.335 21.0 kg Hotter, -1.0 pp, -5 yr warranty
SS8-54HSB-410M 410 W 21.00% -0.335 21.0 kg Hotter, -0.8 pp, -5 yr warranty
SS8-54HSB-415M 415 W 21.25% -0.335 21.0 kg Hotter, lighter, -5 yr warranty
SS8-54HSB-420M 420 W 21.51% -0.335 21.0 kg Hotter, lighter, -5 yr warranty
SS8-54HD-430N 430 W 22.02% -0.290 24.0 kg +0.3 pp
LR7-54HJD-510M 510 W 25.00% -0.240 23.5 kg +85 W, cooler, +3.2 pp
AIKO-A495-MCE54Mw 495 W 24.80% -0.260 21.0 kg +70 W, lighter, +3.0 pp

Found 1783 panels of the same or similar size to this one, within ±10 mm. See them here Found 1914 panels of the same or similar size to this one, within ±25 mm. See them here Found 3392 panels of the same or similar size to this one, within ±50 mm. See them here Found 3970 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 SS8-54HDB 420-440N solar panels?
The Lumina II series includes a 15-year product warranty covering material and workmanship defects, plus a 30-year linear power output warranty. The manufacturer guarantees a defined performance level for three decades, significantly reducing investment risk and making long-term return-on-investment calculations for the PV system more reliable.
Are the Solarspace Lumina II modules bifacial, and what does that mean for my system?
Yes, the SS8-54HDB series uses bifacial technology, allowing the module to generate power from both the front and rear surfaces. The rear side harvests reflected irradiance from the ground, rooftop surface, gravel, or snow, potentially boosting real-world energy yield by several percentage points compared to a standard monofacial module, particularly with adequate albedo and ground clearance.
Do the Solarspace Lumina II All Black panels suit a modern premium rooftop?
Absolutely. The Lumina II All Black series is designed for installations where aesthetics matter as much as performance. The uniform black frame, black cells, and black backsheet create a sleek, seamless look on dark rooftops. It's a strong choice for single-family homes, modern architectural projects, and premium commercial buildings where visual impact is a key priority.
How does the N-type TOPCon technology in the Lumina II compare to standard PERC cells?
N-type TOPCon cells deliver higher conversion efficiency, a lower temperature coefficient, and significantly reduced susceptibility to light-induced degradation (LID) compared to P-type PERC technology. In practice, this means less power loss on hot days, a slower long-term performance decline, and higher cumulative energy output over the module's full operational lifespan.
How do the Solarspace Lumina II panels perform in winter and under overcast skies?
N-type TOPCon technology features a favorable temperature coefficient, so the modules lose less power at high temperatures and run efficiently in cool winter conditions. The bifacial design can also capture additional reflected irradiance from surrounding snow, boosting output on clear winter days. Under diffuse light, the Lumina II series generally outperforms older PERC modules, though actual yield depends on local irradiation levels.
Is Solarspace a reliable manufacturer — where are they based and do they hold Tier 1 status?
Solarspace is a Chinese photovoltaic manufacturer holding Tier 1 status, recognized by independent financial institutions as a bankable and production-capable supplier. Tier 1 designation is not a product quality rating but a measure of the company's financial stability and manufacturing scale, which is an important risk consideration when evaluating long-term renewable energy investments.
Add to compare