--- title: "Solarspace SS8-54HD-435N 435W Solar Panel - Specs & Review | ComparePV" description: "Solarspace SS8-54HD-435N 435W solar panel. Specs: 22.28% efficiency, Monocrystalline cells, dimensions, warranty and temperature coefficient." source: "https://comparepv.com/panel/solarspace-ss8-54hd-435n" updated: 2026-09-11 --- # Solarspace SS8-54HD-435N Space saver, heavy for its output 321 panels in the segment N-type 400-450 W ## Identity - **Manufacturer:** Solarspace - **Model:** SS8-54HD-435N - **Series:** SS8-54HD 425-445N - **Rated power:** 435 W - **Cell technology:** N-type - **Bifacial:** yes ## How it compares Compared against segment N-type 400-450 W (321 panels). | Measure | This panel | Segment median | Standing | Rank | | --- | --- | --- | --- | --- | | Power (Wp) | 435 W | 430 W | Typical | | | Module efficiency | 22.28% | 21.91% | Strong - top 24% | 5,403 | | Power density | 222.8 | 218.3 | Strong - top 17% | 5,150 | | Temperature coefficient | -0.290 | -0.290 | Typical | 2,165 | | Weight (kg) | 24.0 kg | 22.0 kg | Weak - bottom 24% | | | Performance warranty | 30 yrs | 30 yrs | Typical | 21 | ### Full peer table | Measure | This panel | Segment median | Standing | Rank | | --- | --- | --- | --- | --- | | Module efficiency | 22.28% | 21.91% | Strong - top 24% | 5,403 | | Power density | 222.8 | 218.3 | Strong - top 17% | 5,150 | | Temperature coefficient | -0.290 | -0.290 | Typical | 2,165 | | Weight per kWp | 55.2 | 51.2 | Weak - bottom 24% | 9,588 | | Performance warranty | 30 yrs | 30 yrs | Typical | 21 | ### Strengths - **222.8 watts per square metre** - Top 17% of the N-type 400-450 W segment, against a median of 218.3. - **22.28% module efficiency** - Top 24% of the N-type 400-450 W segment, against a median of 21.91%. ### Watch out for - **55.2 kg per kWp** - Bottom 24% of the N-type 400-450 W segment, against a median of 51.2. - **Best for:** Residential, commercial and shaded-installations. - **Not ideal for:** Weight-limited structures. ## Specification ### Electrical - **Rated power (Pmax):** 435 W - **Efficiency:** 22.28 % - **Voltage at Pmax (Vmp):** 32.37 V - **Current at Pmax (Imp):** 13.44 A - **Open-circuit voltage (Voc):** 38.46 V - **Short-circuit current (Isc):** 14.21 A - **Max system voltage:** 1500 V ### Temperature - **Temperature coefficient of Pmax:** -0.290 %/degC - **Temperature coefficient of Voc:** -0.260 %/degC - **Temperature coefficient of Isc:** 0.045 %/degC - **NOCT:** 45 degC ### Cell and construction - **Cell type:** Monocrystalline - **Cell technology:** N-type - **Cell count:** 108 - **Bifacial:** yes ### Physical - **Length:** 1722 mm - **Width:** 1134 mm - **Thickness:** 30 mm - **Weight:** 24.0 kg - **Area:** 1.95 m2 - **Power density:** 222.8 Wp/m2 ### Warranty and degradation - **Product warranty:** 15 years - **Performance warranty:** 30 years - **Output guaranteed at end of warranty:** 87.4 % - **First-year degradation:** 1.00 % - **Annual degradation:** 0.40 % - **Output after 30 years:** 380 W ## Rank in the whole catalogue | Measure | Position | | --- | --- | | Efficiency | 5403 of 14005 | | Power density | 5150 of 14005 | | Temperature coefficient | 2165 of 14005 | | Weight | 9588 of 14005 | | Warranty | 21 of 14005 | ## About this series 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. ## Notable figures - Efficiency of 22.3% matches the \*\*N-type 400-450W\*\* median - 222.8 W/m² power density - 4.5 W/m² more than \*\*N-type 400-450W\*\* median (218.3 W/m²), more power per roof area - Temperature coefficient of -0.29%/°C matches the \*\*N-type 400-450W\*\* median - Weight of 24.0 kg is 2.0 kg above \*\*N-type 400-450W\*\* median (22.0 kg) - verify structural support - Bifacial design (80% factor) captures reflected light - adds 4-12% yield on ground-mount or white roof ## Questions ### 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. ## Datasheet [Manufacturer datasheet (PDF)](https://comparepv.com/datasheets/ss8-54hd-n-9726ddaf4668.pdf) ## Alternatives | Panel | Power | How it differs | | --- | --- | --- | | [JA Solar JAT54S40-485/LR](https://comparepv.com/panel/ja-solar-jat54s40-485-lr) | 485 W | +50 W, lighter, +2.0 pp | | [AIKO AIKO-A485-MCE54Mw](https://comparepv.com/panel/aiko-aiko-a485-mce54mw) | 485 W | +50 W, lighter, +2.0 pp | | [AIKO AIKO-A485-MAH54Mw](https://comparepv.com/panel/aiko-aiko-a485-mah54mw) | 485 W | +50 W, cooler, +2.0 pp | | [Gokin GK-5-54HG-485M](https://comparepv.com/panel/gokin-gk-5-54hg-485m) | 485 W | +50 W, lighter, +2.0 pp | | [Heckert Solar ZEUS 3.0+ 108 485WP](https://comparepv.com/panel/heckert-solar-zeus-3-0-108-485wp) | 485 W | +50 W, cooler, +2.0 pp | | [Solarspace SS8-54HSB-395M](https://comparepv.com/panel/solarspace-ss8-54hsb-395m) | 395 W | Hotter, -2.1 pp, -5 yr warranty | | [Solarspace SS8-54HSB-400M](https://comparepv.com/panel/solarspace-ss8-54hsb-400m) | 400 W | Hotter, -1.8 pp, -5 yr warranty | | [Solarspace SS8-54HSB-405M](https://comparepv.com/panel/solarspace-ss8-54hsb-405m) | 405 W | Hotter, -1.5 pp, -5 yr warranty | | [Solarspace SS8-54HSB-410M](https://comparepv.com/panel/solarspace-ss8-54hsb-410m) | 410 W | Hotter, -1.3 pp, -5 yr warranty | | [Solarspace SS8-54HSB-415M](https://comparepv.com/panel/solarspace-ss8-54hsb-415m) | 415 W | Hotter, -1.0 pp, -5 yr warranty | | [Solarspace SS8-54HSB-420M](https://comparepv.com/panel/solarspace-ss8-54hsb-420m) | 420 W | Hotter, -0.8 pp, -5 yr warranty | | [Solarspace SS8-54HD-425N](https://comparepv.com/panel/solarspace-ss8-54hd-425n) | 425 W | -10 W, -0.5 pp | | [Solarspace SS8-54HD-430N](https://comparepv.com/panel/solarspace-ss8-54hd-430n) | 430 W | -0.3 pp | | [Longi Solar LR7-54HJD-510M](https://comparepv.com/panel/longi-lr7-54hjd-510m) | 510 W | +75 W, cooler, +2.7 pp | | [AIKO AIKO-A495-MCE54Mw](https://comparepv.com/panel/aiko-aiko-a495-mce54mw) | 495 W | +60 W, lighter, +2.5 pp | | [Longi Solar LR7-54HJD-505M](https://comparepv.com/panel/longi-lr7-54hjd-505m) | 505 W | +70 W, cooler, +2.4 pp | --- Source: https://comparepv.com/panel/solarspace-ss8-54hd-435n Not in this file, on the page: the I-V and temperature curves lifted from the manufacturer's datasheet, a thirty-year output simulator, a bifacial gain calculator and alternatives filtered by how closely they match these dimensions.