Value Chain
Fully Integrated Giga-Scale Manufacturing
Indosol Solar’s vertically integrated manufacturing facility
fully equipped to handle manufacturing process involving every step from
melting polysilicon into mono-crystalline ingots to shipping certified modules.
Silicon Ingots
High-purity monocrystalline silicon grown via Czochralski process
Solar Wafers
Ultra-thin precision-sliced silicon wafers with minimal material loss
Solar Cells
G12R N-Type TOPCon bifacial cells with edge passivation
Solar Modules
DCR & Non-DCR glass-glass bifacial modules for all applications
Stage 01 - Silicon Ingots
Solar Ingot Manufacturing
A solar ingot is a high-purity crystalline siliconin cylindrical shape used in the manufacturing of solar wafers, which are later converted into solar cells and solar modules. It is one of the most important intermediate products in the photovoltaic (PV) manufacturing chain.
It is formed by melting purified polysilicon at very high temperatures and crystallizing it into a solid structure. These ingots are then sliced into ultra-thin wafers using diamond wire saws.
Indosol Solar manufactures high-quality monocrystalline silicon ingots using Czochralski (CZ) crystal growth technologies to ensure superior wafer quality and high efficiency solar cells.
The ingot manufacturing process focuses on
- High-purity Czochralski (CZ) grown monocrystalline silicon
- Advanced heat shield to achieve low defect density
- Recharged Czochralski (CZ) method for reduced energy consumption
- Optimized energy efficiency
- Fully automated one touch crystal growth for optimal dopant distribution and minimizing radial resistance variation
- Precision-controlled manufacturing environment
These solar ingots form the foundation for producing next-generation high-efficiency solar wafers and TOPCon solar cells.
Stage 02 - Wafers
Solar Wafer Manufacturing
A solar wafer is a thin slice of highly purified Mono-crystalline silicon used as the base material for manufacturing photovoltaic (PV) solar cells. It acts as the semiconductor substrate where sunlight is converted into electrical energy through the photovoltaic effect.
It is a high-quality solar -grade silicon substrate produced by slicing monocrystalline ingots into ultra-thin sections with precisely controlled thickness, resistivity, crystal orientation, and reduced impurity concentration for photovoltaic applications.
Indosol Solar’s wafer manufacturing line is designed to produce ultra-thin, high-performance silicon wafers with exceptional dimensional accuracy and minimal material loss.
Key Features
- Advanced wafer slicing technology
- High mechanical strength wafers
- Low micro-crack formation
- Superior surface quality
- Optimized thickness uniformity
- Optimized C/O concentration for higher efficiency
The wafers are engineered to support advanced solar technologies including TOPCon cell and can be configured for HJT cell architecture for higher module output and long-term reliability.
Stage 03 - Solar Cells
G12R N-Type TOPCon Bifacial Solar Cells
G12R solar cells are advanced rectangular-format photovoltaic cells based on the 210 mm wafer platform. These cells are widely used in high-efficiency N-Type TOPCon solar modules for utility-scale, industrial and commercials and rooftop applications. The Solar industry is adopting G12R technology for higher module power and improved system efficiency.
N-Type TOPCon (Tunnel Oxide Passivated Contact) technology is the latest high-efficiency solar cell architecture replacing conventional PERC technology. Bifacial solar cells generate electricity from both front and rear sides, increasing total energy yield.
Key Features of G12R Solar Cells:
- Rectangular wafer format
- Better module packing density
- Reduced BOS (Balance of System) cost
- Higher power output with lower transportation cost
- Improved rooftop utilization
- Our cell architecture boasts TOPCon plus technology, involving the latest and state-of-the art Edge passivation to ensure high reliability in field, Laser fired contact optimization for lower contact resistivity and higher open circuit voltage and poly-finger for reducing parasitic absorption and improving carrier collection which increases the absolute efficiency and significantly boosts Bifaciality.
Stage 04 - Solar Modules
TOPCon Bifacial Glass-Glass PV Modules
Indosol Solar manufactures both Domestic Content Requirement (DCR) and Non-Domestic Content Requirement (Non-DCR) solar modules.
DCR Modules
132 Cut Cells 16 BB 600Wp – 630Wp
Our DCR solar modules are engineered to deliver superior performance, enhanced durability, and long-term reliability for utility-scale and commercial solar applications. Built with advanced G12R N-Type TOPCon technology, these bifacial glass-glass modules ensure higher energy generation, lower LCOE, and exceptional performance under diverse environmental conditions. With excellent PID resistance, superior weak-light performance, and one of the industry’s best thermal coefficients, the modules consistently deliver higher commercial gains and stable energy output.
Non-DCR Modules
144 Cut Cell 16 BB 570Wp - 590Wp
The Non-DCR N-Type TOPCon PV Modules are engineered to deliver high efficiency, superior reliability, and enhanced energy generation. Designed with advanced bifacial glass-glass technology, these modules offer lower temperature coefficient, reduced degradation, minimized hotspot shading effects, excellent bifacial performance, PID resistance, low LID protection, and enhanced mechanical durability for long-term performance.
Why Indosol Solar?
Built for Performance & Reliability.
Every product we manufacture reflects our commitment to quality,
innovation, and long-term solar energy performance.
High Efficiency
G12R N-Type TOPCon cells deliver industry-leading conversion efficiency with superior power output per unit area.
Advanced Manufacturing
State-of-the-art CZ crystal growth, diamond wire slicing, and automated cell processing for consistent quality.
Reliability
Proven long-term performance with excellent PID resistance, low LID, and industry-best thermal coefficients.
Sustainability
Committed to reducing carbon footprint through optimized energy consumption in manufacturing and clean energy output.
Low Defect Density
Advanced heat shield technology and precision manufacturing minimize crystal defects for superior wafer and cell quality.
Energy Optimization
Bifacial module design, recharged CZ method, and optimized manufacturing reduce LCOE and maximize energy yield.
Applications
Industries & Applications.
Indosol Solar products power projects across diverse sectors — from
gigawatt-scale utility installations to commercial rooftops.
Utility Scale Solar
GW-scale power plants with maximum energy generation and lowest LCOE
Industrial Applications
Large-scale industrial solar plants for energy-intensive manufacturing facilities
Commercial Projects
Commercial & industrial (C&I) solar solutions for offices, malls, and campuses
Rooftop Solar
G12R format cells with improved rooftop utilization and higher power density