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685Wp
Solarspace Review

SS9-66HD-685N

MonocrystallineBifacial
22.05%
Efficiency
220.5 Wp/m²
Power Density
-0.290%/°C
Temp. Coeff. Pmax chart
599W from 685W
Power after 30 years
  • Efficiency of 22.1% is 1.2pp below the N-type 650-700W median (23.3%)
  • Power density of 220.5 W/m² is 12.0 W/m² below N-type 650-700W median (232.5 W/m²) - needs more roof space
  • Temperature coefficient of -0.29%/°C matches the N-type 650-700W median
  • Weight of 37.5 kg is 4.0 kg above N-type 650-700W median (33.5 kg) - verify structural support
  • Bifaciality factor of 80% can add 4-12% extra yield with reflective mounting surface
Performance Profile
Price Offers 0
Shop Country Price Price/kWp
Series SS9-66HD 670-690N 5 variants
Efficiency Range 21.6% - 22.2%
Avg. Efficiency 21.89%
Technology N-type
Dimensions 2384 × 1303 mm
Show series description

The Solarspace SS9-66HD 670-690N series is designed to maximize energy production from a given surface area – these modules make it easier to design installations where every square meter of roof or ground counts. The use of N-TOPCon cells results in more stable performance over time and better utilization of solar radiation, even in less sunny conditions. This is particularly important in Poland, where weather can be unpredictable, and investors expect predictable returns.

The bifacial dual-glass construction helps to increase production by working with both sides, while also enhancing the module's resistance to environmental factors. Another advantage is the low degradation typical of N-type technology, as well as the favorable temperature coefficient, which limits power losses in hot weather.

This series is ideal for PV farms, large commercial rooftops, and anywhere where the goal is to maximize production and ensure long-term investment profitability.

Panels from the same series differ mainly in power output while having identical dimensions. Learn why →
Electrical Parameters (STC)
Nominal Power (Pmax)685 Wp
Module Efficiency22.05%
Voltage at Max Power (Vmpp)39.90 V
Current at Max Power (Impp)17.18 A
Open Circuit Voltage (Voc)47.60 V
Short Circuit Current (Isc)18.20 A
Max System Voltage1500 V
Temperature Coefficients
Temp. Coeff. Pmax-0.290%/°C
Temp. Coeff. Voc-0.260%/°C
Temp. Coeff. Isc0.045%/°C
NOCT45°C
Cell Technology
Cell TypeMonocrystalline
Cell Count132
BifacialYes
Bifaciality Factor80%
Dimensions & Weight
Length2384 mm
Width1303 mm
Height33 mm
Weight37.5 kg
Area3.11 m²
Power Density220.5 Wp/m²
Warranty
Product Warranty12 years
Performance Warranty30 years
End-of-Warranty Output87.4%
First Year Degradation1.00%
Annual Degradation0.40%/year
Key Specifications
22.05%
Efficiency
685 Wp
Power
-0.29%/°C
Temp Coeff
30 yrs
Warranty