425Wp

DualSun Review

SPRING4 425 TOPCon NI

Name: DualSun SPRING4 425 TOPCon NI
Brand: DualSun

Monocrystalline

Datasheet

21.80%

Efficiency

217.6 Wp/m²

Power Density

-0.310%/°C

Temp. Coeff. Pmax chart

371W from 425W

Power after 30 years

Price Offers 0

Shop	Country	Price	Price/kWp

Series SPRING4 2 variants

All variants in this series

425W

21.8%

This panel

425W

21.8%

Show series details

Efficiency Range 21.8% - 21.8%

Avg. Efficiency 21.80%

Technology TOPCon

Dimensions 1722 × 1134 mm

Panels from the same series differ mainly in power output while having identical dimensions. Learn why →

Electrical Parameters (STC)

Nominal Power (Pmax)	425 Wp
Module Efficiency	21.80%
Voltage at Max Power (Vmpp)	33.75 V
Current at Max Power (Impp)	12.60 A
Open Circuit Voltage (Voc)	39.35 V
Short Circuit Current (Isc)	13.33 A
Max System Voltage	1500 V

Temperature Coefficients

Temp. Coeff. Pmax	-0.310%/°C
Temp. Coeff. Voc	-0.260%/°C
Temp. Coeff. Isc	0.038%/°C
NOCT	45°C

Cell Technology

Cell Type	Monocrystalline
Cell Count	108
Bifacial	No
Bifaciality Factor	-

Dimensions & Weight

Length	1722 mm
Width	1134 mm
Height	71 mm
Weight	33.7 kg
Area	1.95 m²
Power Density	217.6 Wp/m²

Warranty

Product Warranty	10 years
Performance Warranty	30 years
End-of-Warranty Output	87.4%
First Year Degradation	-
Annual Degradation	-

Key Specifications

21.80%

Efficiency

425 Wp

Power

-0.31%/°C

Temp Coeff

30 yrs

Warranty

30-Year Degradation & Energy Production Simulation

Quick Presets

Irradiance (kWh/kWp/year) US avg: 1200-1800

Energy Price ($/kWh) Inflation: 0%

Energy Price Inflation (%/year)

Power after 30 years

Total Energy (30 yrs)

Energy Value

Efficiency & Power Over Time

Annual Energy Production

About the simulation: Calculations based on declared annual degradation (-%/year). Default irradiance (1200 kWh/kWp/year) is an average - check your exact value using PVGIS. Actual production depends on location, orientation, shading, and installation quality.

Power vs Cell Temperature Simulation (-0.310%/°C)

At 75°C (hot roof in summer):

Power: -

Power Loss: -

At Different Temperatures:

25°C (STC)	-
45°C	-
55°C	-
65°C	-
75°C	-

Your Temperature:

°C

Cell temperature of 75°C is typical for rooftop panels on a hot summer day at full irradiance. Temperature coefficient -0.310%/°C means power drops by this percentage for each degree above 25°C.

Bifacial Profit Calculator 70%

Select Surface Below Panel

What is albedo? Albedo is the fraction of sunlight reflected by a surface. Higher albedo (lighter surfaces) means more light reaches the back of bifacial panels, increasing total energy production.

Estimated Rear Gain

Front Power: -

Rear Gain: -

Total Effective Power: -

Calculation: Bifaciality (-) × Albedo × 0.6 (view factor)

This calculator uses a simplified model with default albedo values and a ground coverage factor of 0.6. Actual gain depends on installation conditions, tilt angle, mounting height, and season. For accurate calculations, we recommend measuring albedo on-site.

Sources: Sandia PVPMC (Albedo) · Bifacial Solar Guide · IEA PVPS

Similar Panels

Same series and power range as this panel

Maxeon 475W

SPRING4 425 TOPCon NI

Price Offers 0

Series SPRING4 2 variants

Electrical Parameters (STC)

Temperature Coefficients

Cell Technology

Dimensions & Weight

Warranty

Key Specifications

30-Year Degradation & Energy Production Simulation

Efficiency & Power Over Time

Annual Energy Production

Power vs Cell Temperature Simulation (-0.310%/°C)

At 75°C (hot roof in summer):

At Different Temperatures:

Your Temperature:

Bifacial Profit Calculator 70%

Select Surface Below Panel

Estimated Rear Gain

Similar Panels

SPR-MAX7-475

JST-EDMH-465W-TD

JST-EDMH-(445-465)W-TD (465W class)

JAT54S40-475/LR