--- title: "Solarspace SS9-60HD-645N 645W Solar Panel - Specs & Review | ComparePV" description: "Solarspace SS9-60HD-645N 645W solar panel. Specs: 22.79% efficiency, Monocrystalline cells, dimensions, warranty and temperature coefficient." source: "https://comparepv.com/panel/solarspace-ss9-60hd-645n" updated: 2026-09-11 --- # Solarspace SS9-60HD-645N Solid all-round for its segment 359 panels in the segment N-type 600-650 W ## Identity - **Manufacturer:** Solarspace - **Model:** SS9-60HD-645N - **Series:** SS9-60HD 625-650N (Lumina II) - **Rated power:** 645 W - **Cell technology:** N-type - **Bifacial:** yes ## How it compares Compared against segment N-type 600-650 W (359 panels). | Measure | This panel | Segment median | Standing | Rank | | --- | --- | --- | --- | --- | | Power (Wp) | 645 W | 625 W | Strong - top 3% | | | Module efficiency | 22.79% | 22.77% | Typical | 3,005 | | Power density | 227.9 | 227.7 | Typical | 2,773 | | Temperature coefficient | -0.290 | -0.290 | Typical | 2,165 | | Weight (kg) | 34.5 kg | 32.5 kg | Typical | | | Performance warranty | 30 yrs | 30 yrs | Typical | 21 | ### Full peer table | Measure | This panel | Segment median | Standing | Rank | | --- | --- | --- | --- | --- | | Module efficiency | 22.79% | 22.77% | Typical | 3,005 | | Power density | 227.9 | 227.7 | Typical | 2,773 | | Temperature coefficient | -0.290 | -0.290 | Typical | 2,165 | | Weight per kWp | 53.5 | 52.7 | Typical | 7,451 | | Performance warranty | 30 yrs | 30 yrs | Typical | 21 | - **Best for:** Commercial, utility-scale and shaded-installations. ## Specification ### Electrical - **Rated power (Pmax):** 645 W - **Efficiency:** 22.79 % - **Voltage at Pmax (Vmp):** 37.21 V - **Current at Pmax (Imp):** 17.35 A - **Open-circuit voltage (Voc):** 44.35 V - **Short-circuit current (Isc):** 18.37 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:** 120 - **Bifacial:** yes ### Physical - **Length:** 2172 mm - **Width:** 1303 mm - **Thickness:** 33 mm - **Weight:** 34.5 kg - **Area:** 2.83 m2 - **Power density:** 227.9 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:** 564 W ## Rank in the whole catalogue | Measure | Position | | --- | --- | | Efficiency | 3005 of 14005 | | Power density | 2773 of 14005 | | Temperature coefficient | 2165 of 14005 | | Weight | 7451 of 14005 | | Warranty | 21 of 14005 | ## About this series 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. ## Notable figures - At 22.8% efficiency, this panel is on par with typical \*\*N-type 600-650W\*\* modules - Power density of 227.9 W/m² matches the \*\*N-type 600-650W\*\* median - At -0.29%/°C, hot weather performance is typical for \*\*N-type 600-650W\*\* panels - Weight of 34.5 kg is 2.0 kg above \*\*N-type 600-650W\*\* median (32.5 kg) - verify structural support - 80% bifaciality enables rear-side power generation, boosting yield by 4-12% on reflective surfaces ## Questions ### 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. ## Datasheet [Manufacturer datasheet (PDF)](https://comparepv.com/datasheets/ss9-60hd-n-b12646a23cd5.pdf) ## Alternatives | Panel | Power | How it differs | | --- | --- | --- | | [AIKO AIKO-A650-MAE72Mw](https://comparepv.com/panel/aiko-aiko-a650-mae72mw) | 650 W | Cooler, lighter, +2.4 pp | | [AIKO AIKO-A680-MDE72Mw](https://comparepv.com/panel/aiko-aiko-a680-mde72mw) | 680 W | +35 W, lighter, +2.4 pp | | [AIKO AIKO-A675-MDE72Mw](https://comparepv.com/panel/aiko-aiko-a675-mde72mw) | 675 W | +30 W, lighter, +2.2 pp | | [AIKO AIKO-A645-MAE72Mw](https://comparepv.com/panel/aiko-aiko-a645-mae72mw) | 645 W | Cooler, lighter, +2.2 pp | | [AIKO AIKO-A695-MAE78Dw](https://comparepv.com/panel/aiko-aiko-a695-mae78dw) | 695 W | +50 W, cooler, +2.1 pp | | [AIKO AIKO-G670-MCH72Mw](https://comparepv.com/panel/aiko-aiko-g670-mch72mw) | 670 W | Cooler, lighter, +2.0 pp | | [Longi Solar LR7-72HVHF-670M](https://comparepv.com/panel/longi-lr7-72hvhf-670m) | 670 W | Cooler, lighter, +2.0 pp | | [Solarspace SS9-60HD-625N](https://comparepv.com/panel/solarspace-ss9-60hd-625n) | 625 W | -20 W, -0.7 pp | | [Solarspace SS9-60HD-630N](https://comparepv.com/panel/solarspace-ss9-60hd-630n) | 630 W | -15 W, -0.6 pp | | [Solarspace SS9-60HD-635N](https://comparepv.com/panel/solarspace-ss9-60hd-635n) | 635 W | -10 W, -0.4 pp | | [Solarspace SS9-60HD-640N](https://comparepv.com/panel/solarspace-ss9-60hd-640n) | 640 W | -0.2 pp | | [Solarspace SS9-60HD-650N](https://comparepv.com/panel/solarspace-ss9-60hd-650n) | 650 W | Very close match | | [Gamko New Energy GKA210N120](https://comparepv.com/panel/gamko-new-energy-gka210n120) | 680 W | Hotter, lighter, +1.2 pp | | [Gamko New Energy GKA210N120-675](https://comparepv.com/panel/gamko-new-energy-gka210n120-675) | 675 W | Hotter, lighter, +1.1 pp | | [Q-SUN Solar QN-670HJT-01](https://comparepv.com/panel/q-sun-solar-qn-670hjt-01) | 670 W | +25 W, cooler, +0.9 pp | | [Gamko New Energy GKA210N120-670](https://comparepv.com/panel/gamko-new-energy-gka210n120-670) | 670 W | Hotter, lighter, +0.9 pp | --- Source: https://comparepv.com/panel/solarspace-ss9-60hd-645n 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.