Who We Are
About CALLSUN / Solar PV Module Brand & Manufacturer
CALLSUN is a solar PV module brand and manufacturer with in-house product development, manufacturing and testing capabilities. We focus on standard and custom PV modules for distributors, installers, system integrators, equipment manufacturers and project partners.
Our portfolio also includes solar inverters, LiFePO4 batteries and reference solar system configurations for different application requirements.
Standard Module Production
Batch supply of standard PV modules.
Custom Module Development
Custom module options for specific requirements.
Quality Control
Quality checks across development, production and testing.
System Configuration Support
Inverters, batteries and reference configurations.
Manufacturing Approx. 55,000 m² Manufacturing Base
Standard Production & Custom Module Engineering
CALLSUN operates automated production for standard PV modules alongside semi-automated manufacturing for custom glass modules. Production arrangements depend on module dimensions and structural requirements.
Standard PV Module Production
Controlled production processes, in-process inspection and final testing support batch consistency and volume supply.
Custom Module Engineering
Available space, target output, module dimensions, structure and connection requirements are reviewed together when assessing a custom request.
The scope and next steps depend on the project requirements and feasibility review.
Requirement Assessment
Sample Trials
Production Validation
Product Portfolio
Quality Management
Quality Control & Verification
Production checks, final inspection and reliability verification are carried out according to product and project requirements.
EL Inspection
Check cell and interconnection condition to identify microcracks and soldering defects.
I-V Characteristic Testing
Record power, voltage, current and I-V curves to verify module electrical performance.
Final & Electrical Safety Checks
Review appearance, applicable electrical safety requirements and pre-shipment inspection items.
Reliability Verification
Applicable tests depend on the specific product and project.
- Damp Heat Testing
- Thermal Cycling
- UV Aging
- Mechanical Load
- Dielectric & Insulation Testing
Discuss Your Product & Supply Requirements
Tell us your product interests, target market, estimated quantity and application requirements. CALLSUN will review your inquiry and discuss the relevant product options, documentation and supply arrangements.
- Distributors & Wholesalers
- Installers & System Providers
- Equipment Manufacturers & Project Buyers
WhatsApp Scan to chat with us