Solar Panel

315W to 350W Poly Solar Panel

Name: 315W to 350W Poly Solar Panel
Brand: WeBright Solar

A-grade Solar Cell Poly Solar Panel 25-year warranty

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3D rendering of two blue photovoltaic solar panels with silver frames standing upright

A grid of dark blue solar panels mounted on a metal frame atop a light-colored corrugated roof.

Solar panels resting on wheeled racks inside a brightly lit manufacturing facility.

Product Overview

What This Product Is

A 350W poly solar panel with A-grade solar cells, designed for use in off-grid solar systems. Available in four power variants: 315W, 320W, 325W, and 330W, each with matching electrical specifications. The panels are built for durability and consistent performance under standard test conditions, with a 25-year power output warranty. They are suitable for integration into pre-configured solar kits or standalone installations where voltage compatibility and long-term output are critical.

Key Benefits

What You Get

A-grade solar cells ensure consistent performance and reliability in off-grid applications
Multiple power options from 315W to 330W to match system sizing needs
High efficiency ranging from 16.25% to 17.02% depending on model

Standard test conditions: 1000W/m2 irradiance, 25℃ ambient, AM 1.5 spectrum
Power tolerance within 0 to +5W, ensuring predictable output at delivery

Who It Is For

Buyers and Sites

Solar installers building complete off-grid systems from matched components
EPC contractors sourcing panels for turnkey solar projects
Electrical wholesalers supplying solar modules to end users in unstable-grid regions
Residential end users purchasing a complete kit with guaranteed panel performance
Importers needing panels that integrate directly with inverters and controllers

Application Scenarios

Where It Is Installed

Off-grid homes in remote areas with no access to utility power
Solar systems requiring modular expansion with consistent voltage and current
Replacement of older panels in existing off-grid installations
Hybrid systems where solar input must match inverter and controller voltage

Problems It Solves

What This Removes From the Job

Panels with inconsistent power output due to poor cell grading or mismatched batches
Uncertainty in system voltage when mixing panels from different models or batches
Lack of long-term performance guarantees leading to early replacement or underperformance
Mismatch between panel Voc and inverter input voltage range during commissioning
No standardised power tolerance, causing discrepancies in expected energy yield

Technical Features

How It Is Built

Module type: WSP72-315, WSP72-320, WSP72-325, WSP72-330
Maximum power output from 315W to 330W across the series
Open-circuit voltage between 45.6V and 46.1V
Maximum power voltage between 36.9V and 37.3V

Short-circuit current from 9.00A to 9.38A
Maximum power current from 8.54A to 8.85A
Module efficiency from 16.25% to 17.02%

Specifications

Technical Data

Values below are taken from the product documentation. Anything not listed is confirmed against your order.

Module Type	WSP72-315, WSP72-320, WSP72-325, WSP72-330
Maximum Power (Pmax)	315W to 330W
Open-circuit Voltage (Voc)	45.6V to 46.1V
Maximum Power Voltage (Vmp)	36.9V to 37.3V
Short-circuit Current (Isc)	9.00A to 9.38A
Maximum Power Current (Imp)	8.54A to 8.85A
Module Efficiency	16.25% to 17.02%
Power Tolerance	0 to +5W
Standard Test Environment	1000W/m2, 25℃, AM 1.5

Configuration

What Is in the Shipment

The packing list follows this table item by item.

Module Type	WSP72-315	WSP72-320	WSP72-325	WSP72-330
Maximum Power(Pmax)	315W	320W	325W	330W
Open-circuit Voltage (Voc)	45.6V	45.8V	45.9V	46.1V
Maximum Power Voltage(Vmp)	36.9V	37.1V	37.2V	37.3V
Short-circuit Current (Isc)	9.00A	9.10A	9.25A	9.38A
Maximum Power Current (Imp)	8.54A	8.63A	8.76A	8.85A
Module Efficiency (%)	16.25%	16.51%	16.77%	17.02%
Power Tolerance	0~+5W
Standard Test Environment	Irradiance 1000w/m2, Ambient temperature 25℃, Spectrum AM 1.5

Materials

What It Is Made Of

Polycrystalline silicon solar cells, A-grade quality
Tempered glass front cover with anti-reflective coating
EVA encapsulant for cell protection and adhesion
Backsheet with UV and moisture resistance
Aluminium frame for structural rigidity and corrosion resistance

Manufacturing and Preparation

Before It Ships

Solar cells selected and tested for A-grade performance before module assembly
Cells interconnected using high-conductivity ribbon and soldering techniques
Encapsulated with EVA and laminated under vacuum to prevent delamination
Mounted in aluminium frame and sealed with silicone for weatherproofing
Final electrical and visual inspection performed before packaging
Packed in wooden crates or export-ready cartons for shipping

Quality Control

Checked Before Packing

Each panel tested under standard test conditions before shipment
Power output verified against the specified Pmax for the model
Visual inspection for microcracks, soldering defects, or frame damage
Electrical continuity and insulation resistance tested
Voc and Imp measured and cross-checked against the configuration table

Customisation

What Can Be Changed at Order Stage

Power output selected from 315W, 320W, 325W, or 330W at order stage
Frame color and finish available in standard black or custom options
Mounting holes and bracket compatibility adjusted for roof or ground mounting

Cable length and connector type specified for integration into kits
Labeling and documentation customized for export and import compliance

Comparison

How It Compares With the Alternatives

Mono solar panel	Lower cost and slightly lower efficiency, but suitable for budget systems with stable performance
Lower grade poly panel	Higher efficiency and better long-term output stability due to A-grade cell selection
Solar panel without warranty	25-year power output warranty ensures predictable performance over time
Panel with negative tolerance	Positive-only power tolerance ensures output meets or exceeds stated rating

Use Guide