- Efficiency of 21.2% matches the PERC 650-700W median
- At 212.5 W/m² power density, roof space requirements are typical for PERC 650-700W panels
- Temperature coefficient of -0.33%/°C matches the PERC 650-700W median
- 37.5 kg weight exceeds %!s(float64=3) median by %!f(string=P) kg (34.5 kg) - heavier for installation crews
- 70% bifaciality enables rear-side power generation, boosting yield by 4-10% on reflective surfaces
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| Shop | Country | Price | Price/kWp |
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Series SS9-66HD 645-670M 6 variants
The Solarspace SS9-66HD 645-670M series are large-format modules designed to maximize energy yield from a limited surface area and ensure stable operation in demanding conditions. The use of bifacial construction allows for a real increase in energy production by utilizing reflected light from the ground – which works particularly well on roofs with light-colored membranes, carports, and ground-mounted installations.
The half-cut architecture also deserves attention, as it reduces losses at connections and improves the module's performance under partial shading – a common scenario, for example, along the edges of roofs, chimneys, or rows of structures. Another distinguishing feature is the anti-reflective glass coating, which supports efficient radiation collection in less favorable lighting conditions.
This is a good choice for investors who value not only high yield but also predictability – this is facilitated by the long linear power warranty and a robust, weather-resistant construction with a sealed connection box. The SS9-66HD series is aimed at C&I and PV farm projects, where performance from each module and ease of scalability are key.
Electrical Parameters (STC)
| Nominal Power (Pmax) | 660 Wp |
| Module Efficiency | 21.25% |
| Voltage at Max Power (Vmpp) | 35.50 V |
| Current at Max Power (Impp) | 14.09 A |
| Open Circuit Voltage (Voc) | 42.70 V |
| Short Circuit Current (Isc) | 14.99 A |
| Max System Voltage | 1500 V |
Temperature Coefficients
| Temp. Coeff. Pmax | -0.330%/°C |
| Temp. Coeff. Voc | -0.260%/°C |
| Temp. Coeff. Isc | 0.046%/°C |
| NOCT | 45°C |
Cell Technology
| Cell Type | Monocrystalline |
| Cell Count | 132 |
| Bifacial | Yes |
| Bifaciality Factor | 70% |
Dimensions & Weight
| Length | 2384 mm |
| Width | 1303 mm |
| Height | 33 mm |
| Weight | 37.5 kg |
| Area | 3.11 m² |
| Power Density | 212.5 Wp/m² |
Warranty
| Product Warranty | 15 years |
| Performance Warranty | 30 years |
| End-of-Warranty Output | 85.0% |
| First Year Degradation | 2.00% |
| Annual Degradation | 0.45%/year |