“We have an in-house Reliability Lab wherein we keep testing new combinations & recipes as well as conduct regular testing from continuous production to benchmark and continuously improve materials and process parameters. We also evaluate field performance feedback. This closed-loop approach ensures that product development is tied to real-world performance outcomes.”
Q. How does Navitas Solar’s in-house module manufacturing line enhance product quality, and what key process controls ensure higher efficiency and reliability of your solar panels?
Navitas Solar’s in-house manufacturing enables us to maintain full control over quality, consistency, and traceability across the module value chain. Unlike outsourced manufacturing, an integrated line allows us to monitor every stage from cell stringing and lay- up to lamination and final testing, ensuring tighter process discipline and lower defect rates.
Key process controls include automated stringer calibration, controlled soldering temperature profiles, EVA/back sheet lay-up accuracy, lamination cycle optimisation, and stringent inline electroluminescence (EL) inspections at critical points. We also ensure flash testing accuracy through regular equipment calibration and maintain strong controls over CTM (Cell-to-Module) losses by optimising optical gain, interconnect resistance, and encapsulation quality. These controls directly translate into higher power output stability and long-term field reliability.
Q. Navitas Solar offers a range of solar panels, can you explain the R&D considerations that drive your choices in cell technology and how these impact performance for different project segments?
Our R&D approach is driven by one core principle: technology selection must match project economics and operating conditions. We evaluate cell technologies based on energy yield, degradation profile, reliability, and bankability not just nameplate efficiency.
For utility-scale projects, we prioritise technologies that deliver high energy yield per MW and low LCOE, especially under high irradiance and temperature conditions typical in India. For C&I and rooftop segments, we also consider factors like space
constraints, shading tolerance, and higher energy density.
We actively assess technology evolution such as advanced mono PERC, TOPCon, and emerging architectures with a focus on real-world performance metrics like temperature coefficient, low-light response, and long-term degradation trends.
Q. EVA sheets area critical component of solar modules, what innovations or specifications does Navitas Solar prioritize in your EVA sheet selection or development to improve module durability and long-term performance?
Encapsulant (such as EVA, EPE & POE) selection plays a major role in module durability because it impacts adhesion strength, optical transmittance, PID resistance, and long-term stability under heat and humidity.
Navitas Solar prioritises Encapsulant specifications that deliver:
- High optical transmittance for better energy yield
- Low gel content variation to ensure stable cross- linking
- Strong adhesion to glass and back sheet to reduce delamination risk
- Enhanced resistance to UV ageing, yellowing, and moisture ingress
We also evaluate Encapsulant compatibility with different cell technologies and back sheet structures. In Indian climatic conditions, especially high heat and humidity. Encapsulant performance is a key determinant of long-term reliability, and we ensure this through controlled lamination cycles and validation testing.
Q. In your EPC business, how does Navitas Solar integrate design, engineering, and installation practices to optimise system yield and reduce lifecycle costs for utility, commercial, and industrial projects?
In EPC, our focus is not only commissioning the plant it’s delivering consistent generation over 25-30 years. Navitas Solar integrates design and execution through strong engineering governance, which includes site-specific design optimisation, electrical loss minimisation, and construction quality controls.
We optimise yield by:
• Selecting the right module and inverter configuration
• Minimising DC/AC losses through better string sizing and cable optimisation
• Improving plant availability through robust BOS and protection systems
• Ensuring high-quality installation practices and QA/QC checkpoints
For C&I, we additionally optimise for load matching, peak demand reduction, and financial savings, while for utility-scale projects, we prioritise LCOE and long-term O&M performance.
Q. Navitas Solar’s RESCO model aims to drive solar adoption, what are the key operational and financial factors you manage to deliver predictable energy output and ROI for customers?
In the RESCO model, customers expect two things: predictable energy generation and financial certainty. To deliver this, we manage both operational and financial levers.
Operationally, we ensure:
• High-quality engineering and component selection
• Strong performance monitoring and preventive maintenance
• Rapid issue resolution and high plant availability
• Realistic generation forecasting based on site conditions
Financially, we structure projects around:
• Bankable equipment and warranties
• O&M cost predictability
• Insurance, performance guarantees, and risk mitigation
• Optimised CAPEX and long-term cash flow stability
This approach ensures customers receive reliable savings while we maintain sustainable project returns.
Q. What role does testing and validation play within Navitas Solar’s R&D framework, and how do you ensure your modules meet both national and international reliability standards before deployment?
Testing and validation are central to our R&D framework because solar is a long-duration asset and reliability must be proven, not assumed.
We ensure compliance with national standards such as BIS and align our module reliability framework with globally accepted benchmarks such as IEC standards. Our validation includes:
• Inline EL testing
• Flash testing with calibrated reference cells
• Insulation and Hi-Pot testing
• Mechanical load and durability assessments
• Reliability checks for PID, hot spots, and microcracks
Most importantly, we have an in-house Reliability Lab wherein we keep testing new combinations & recipes as well as conduct regular testing from continuous production to benchmark and continuously improve materials and process parameters. We also evaluate field performance feedback. This closed-loop approach ensures that product development is tied to real-world performance outcomes.
Q. With multiple offerings from modules to complete EPC services, how does Navitas Solar ensure seamless integration between components (modules, mounting structures, inverters, BOS) and oversee system performance optimisation?
End-to-end integration is one of Navitas Solar’s strongest advantages because it allows us to design systems holistically rather than treating modules, inverters, and BOS as isolated components.
We ensure seamless integration through:
• Standardised design templates and engineering review checkpoints
• Compatibility validation across modules, inverter MPPT ranges, and string design
• BOS optimisation for electrical losses, safety, and maintainability
• Strong commissioning protocols and performance ratio benchmarking
Post commissioning, we oversee performance using monitoring platforms, analytics-driven maintenance, and performance reporting aligned to customer KPIs. This ensures the system continues to operate at optimal efficiency across its lifecycle.
