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Solarspace Brand review

SS8-54HD-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 SS8-54HD 425-445N series is designed for maximum energy generation on a limited surface area - these modules feature a high cell density and refined connection architecture, which effectively support high efficiency in rooftop installations. The use of n-type TOPCon cells ensures more stable performance over the long term and reduces susceptibility to typical performance degradation, which can negatively impact the profitability of many standard panels. In practice, this means a better return on investment and more reliable operation throughout the lifespan of the installation. The modules utilize half-cut cell technology, which helps minimize losses under partial shading and improves resistance to microcracks. Furthermore, the anti-reflective coating supports energy production in diffuse light conditions - which are common in Poland. This is a good choice for homes, small businesses, and projects where long-term power warranty and predictable performance compared to competitors are important.

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, commercial and shaded-installations.

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
  • At 21.8% efficiency, this panel is on par with typical N-type 400-450W modules
  • Power density of 217.6 W/m² matches the N-type 400-450W median
  • At -0.29%/°C, hot weather performance is typical for N-type 400-450W panels
  • At 24.0 kg, this panel is 2.0 kg heavier than the N-type 400-450W median (22.0 kg) - more demanding for installation crews
  • 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.

Linear Power Warranty (Degradation over 30 Years) Linear Power Warranty (Degradation over 30 Years) Whole series I-V/P-V Curve at Different Irradiation (SS8-54HD-425N) I-V/P-V Curve at Different Irradiation (SS8-54HD-425N) 425 W

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 SS8-54HD-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 does the Solarspace SS8-54HD 425-445N come with?
The SS8-54HD 425-445N series includes a 15-year product warranty covering defects and workmanship, plus a 30-year power output warranty guaranteeing at least 87.4% of rated power after three decades. This is among the longer performance warranties available in this product class, providing predictable ROI and reliable output throughout the full system lifetime.
How does the Solarspace SS8-54HD 445N perform in real-world conditions with variable weather?
The module uses n-type TOPCon cells with a low temperature coefficient of Pmax at -0.29%/°C, meaning less power loss during hot summer days compared to standard PERC modules. The anti-reflective coating boosts output under diffuse irradiance, common in temperate and overcast climates. The frame is rated for snow loads up to 5400 Pa and wind loads up to 2400 Pa, meeting requirements for most residential and small commercial installations.
What is TOPCon technology in the SS8-54HD panels and how does it compare to PERC?
TOPCon (Tunnel Oxide Passivated Contact) is an n-type cell architecture that adds a thin passivation layer to reduce charge carrier recombination. This translates to higher module efficiency — up to 22.79% for the 445W variant — and slower long-term degradation compared to p-type PERC cells. TOPCon modules also show better resistance to elevated temperatures and UV exposure over their operational lifetime, improving LCOE for the system owner.
What does bifacial mean for the SS8-54HD and is the extra energy gain worth it?
A bifacial module generates power from both the front side (direct irradiance) and the rear side (light reflected from the roof or ground surface). For rooftop installations, the bifacial gain typically adds 5–15% to total energy yield depending on the albedo and tilt of the mounting surface. The SS8-54HD 425-445N bifacial design lets you extract more kWh per installed module without adding extra panels, directly improving the LCOE of the entire system.
Is the Solarspace SS8-54HD 425-445N suitable for a standard residential pitched roof?
Yes. At 1722×1134×30 mm and approximately 24 kg, the module fits within the load and dimensional limits of most standard residential racking systems. The half-cut 108-cell layout reduces mismatch losses under partial shading from chimneys or dormers. The 1500 V maximum system voltage ensures compatibility with modern string inverters commonly used in residential and small commercial PV installations.
Is the Solarspace SS8-54HD 425-445N series still available for purchase?
Yes, the SS8-54HD 425-445N series is currently in production and has not been discontinued. Solarspace is a Tier 1 manufacturer, which ensures consistent module availability through authorized distributors and ongoing warranty and service support. Contact your local authorized distributor to confirm current stock levels and lead times before placing an order.
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