Product Details

Solar Panel Polycrystalline (Bifacial)

Detailed Specifications

What is a bifacial solar panel

A bifacial solar module is designed to collect sunlight from both its front and rear sides (whereas a standard “monofacial” panel only uses the front). The rear side captures light reflected off the ground or surroundings (albedo) and thereby increases total energy output.

Benefits include:

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Higher potential energy yield (especially in installations with high reflectivity under the panel)

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Often more durable (many use double-glass, transparent backsheets, etc)

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Useful for large-scale ground-mounted or elevated installations where back side reflection is significant

Example Specifications from Real Panels

Here are actual specification extracts from some bifacial panels to illustrate the range and what to expect.

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Model: N-TOPCon Bifacial 570-595 W (Double glass, 144 cells)

Rated power: 570-595 W, efficiency ~23.04%

Cell size: 182 × 91 mm, 144 monocrystalline cells

Temp coefficient Pmax: -0.320%/°C, Voc: -0.270%/°C

Load ratings: Wind 2400 Pa / Snow 5400 Pa

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Model: N-Type 615 W Bifacial

Efficiency up to ~23.3%

Mechanical: Weight ~32.5 kg

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Model: SEG Solar 430 W, 108 half-cell N-Type Bifacial

Efficiency ~22.02%

Dimensions: 1722 × 1134 × 30 mm, Weight 24 kg.

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Model: 550 Wp Mono Half-Cut Bi-Facial Panel (Elerix)

Efficiency ~21.3% for 550 Wp model

Rear-gain potential: when placed on highly reflective surface, up to ~30% extra production

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Model: Bifacial Photovoltaic Panel 530-550 W (IBEX series)

Efficiency up to ~26.62% (including rear side gain)

Dimensions: 2279 × 1134 × 35 mm, Weight ~27.5 kg

Typical Spec Summary (template)

When you want to create your own specification sheet for a bifacial panel, you might include something like:

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Product type: Bifacial solar module (dual-glass or transparent backsheet)

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Cell technology: e.g., Mono-crystalline / N-Type / Half-cut / PERC

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Rated power (STC): e.g., 550 Wp

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Module efficiency: e.g., 21.3%

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Bifaciality / rear side gain: e.g., Up to +30% extra energy

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Open circuit voltage (Voc): e.g., 49.85 V

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Short circuit current (Isc): e.g., 13.97 A

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Voltage at maximum power (Vmp): e.g., 42.00 V

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Current at maximum power (Imp): e.g., 13.10 A

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Temperature coefficients: e.g., Pmax: -0.310%/°C; Voc: -0.260%/°C

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Maximum system voltage: e.g., 1500 V DC

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Mechanical specs: Dimensions (L×W×H), Weight, Glass thickness, Frame material, Cell count

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Load ratings: Wind load / Snow load

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Certifications: IEC 61215, IEC 61730, etc

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Warranty: e.g., 12 years product, 30 years linear performance

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Product tolerance: e.g., 0 / +5 W

Key specification categories

When specifying or comparing bifacial panels, you’ll typically see a number of parameters. Here are the major ones:

Specification

Why it matters

Rated power (P_max or Wp)

The nameplate power under standard test conditions (front side only, typically).

Module efficiency

The conversion efficiency (% of sunlight to electricity) under STC.

Bifacial gain / bifocality coefficient Indicates how much extra power the rear side can provide (e.g., +10-30% more).

Indicates how much extra power the rear side can provide (e.g., +10-30% more).

Open-circuit voltage (V_oc) / Short-circuit current (I_sc)

Electrical characteristics used for system design (inverter matching, string design).

Maximum power voltage/current (V_mpp, I_mpp)

Conditions at maximum power output.

Temperature coefficients

How performance drops as temperature rises (important for hot climates).

Mechanical specs (dimensions, weight, frame, glass/back-glass, load ratings)

Mounting design, structural behaviour, wind/snow load, weight constraints.

System voltage, certifications (IEC, UL, etc.)

For safety, compliance and system compatibility.

Warranty / degradation rate

Indicates how long the panel will reliably perform (e.g., % output after 25-30 years).

 SG P-60 Series 135W-155W

Specification

Type

Polycrystalline

Model No.

SG135P-60

SG140P-60

SG145P-60

SG150P-60

SG155P-60

Warranty

Product Warranty

12 Years

Power Warranty

12 Years of 90.2%, 30 Years of 80.7%

Electrical Data at STC

Maximum Power (Pmax)

135 Wp

140 Wp

145 Wp

150 Wp

155 Wp

Voltage at Maximum Power (Vmpp)

17.13 V

17.57 V

17.58 V

18.03 V

18.26 V

Current at Maximum Power (Impp)

7.88 A

7.97 A

8.25 A

8.32 A

8.49 A

Open Circuit Voltage (Voc)

20.67 V

21.12 V

21.44 V

22.03 V

22.64 V

Short Circuit Current (Isc)

8.71 A

8.84 A

9.02 A

9.08 A

9.13 A

Panel Efficiency

13.61 %

14.12 %

14.62 %

15.13 %

15.63 %

Power Tolerance (Positive)

+ 3.5 %

+ 3.5 %

+ 3 %

+ 3 %

+ 3 %

Material Data

Panel Dimension (H/W/D)

1480x670x35 mm

Weight

10.8 kg

Cell Size

156×156 mm

Cell Number

36

Junction Box Diodes

2

Junction Box Protection Class

IP 67

Connector Type

MC4

Cable Crossection

4 mm²

Cable Length

900 mm