Top String Inverters Available in the Indian Market for Utility-Scale Solar Projects

As India continues its aggressive push toward renewable energy, utility-scale solar projects are playing a critical role in helping the country achieve its clean energy goals. From large ground-mounted installations in solar farms under the PM-KUSUM scheme, one technology has emerged as a key enabler of scalability and efficiency—string inverters.

Unlike traditional central inverters, string inverters are modular, easy to deploy, and offer high conversion efficiency with better fault isolation. These characteristics make them particularly attractive for India’s harsh climates and large-scale solar ambitions.

In this article, let’s explore what makes string inverters suitable for utility-scale applications and review some of the top string inverters available in India.

String inverters convert the DC electricity generated by PV modules (connected in series as “strings”) into AC electricity that can be used on the grid. While they were once limited to rooftop or small commercial installations, advances in capacity and design have made them a preferred solution for ground-mounted solar systems and PM-KUSUM deployments.

• Modularity: Each unit can manage several PV strings independently. This modularity enables developers to scale the plant as needed without requiring a complete redesign.
• Multiple MPPTs: Modern string inverters come with 8 to 15 maximum power point trackers (MPPTs), allowing them to optimize power output from arrays with different orientations or shading conditions.
• High Efficiency: With conversion efficiencies reaching up to 99%, string inverters ensure minimal energy loss during DC to AC conversion.
• Ease of Maintenance: Faults are easier to isolate and replace in individual string inverters compared to large central systems, leading to reduced downtime and lower O&M costs.
• Scalability: Ideal for distributed applications like PM-KUSUM Component A, B, and C, where projects are decentralized and phased.
• Smart Monitoring: Most string inverters today support remote monitoring, predictive maintenance, and grid-support functions.

Here are the leading high-capacity string inverters currently dominating India’s utility and government-backed solar market:

This is the most powerful utility scale string inverter available in India today. The Hopewind 385kW inverter is engineered for large-scale projects that demand high energy throughput, lower BOS costs, and optimal performance in harsh Indian climates.

Key Highlights:

• 8 MPPTs and 32 inputs
• Supports 210mm modules (600Wp and beyond)
• IP66 protection for dust-prone and agricultural zones
• AFCI (Arc Fault Circuit Interruption) optional
• Operates up to 60°C without derating

Best Suited For: Large-scale ground-mounted and PM-KUSUM Component A projects across high-temperature zones.

A widely deployed and trusted option in the Indian utility space, Sungrow’s SG320HX supports 1500V architecture, making it suitable for most new-age solar modules and plant designs.

Key Highlights:

• 8 MPPTs
• 1500V system voltage
• Integrated smart monitoring and string-level analytics
• Compliance with IEC and CEA grid codes

Best Suited For: Utility developers and EPCs looking for digital integration, excellent technical support, and global warranty coverage.

The WattPower 330KTL-H1 is a robust, high-capacity string inverter designed for large-scale ground-mounted solar projects. It offers high efficiency, flexibility in design, and intelligent O&M features.

Key Highlights:

• 330kW output capacity
• 1500V DC input, supports next-gen high-power modules
• 8 MPPTs with high precision tracking
• Remote monitoring, string-level analytics, and smart fault detection
• IP66-rated for rugged outdoor applications

Best Suited For: EPCs and developers looking for a balance of high power output, advanced diagnostics, and field-tested reliability in Indian conditions.

• DC Input Voltage: Modern string inverters now support 1100V or 1500V DC inputs, ensuring compatibility with next-gen PV modules and large arrays.
• String Capacity: Models like Hopewind and WattPower can handle up to 32 strings per inverter, allowing denser installations.
• O&M Optimization: String-level diagnostics reduce mean time to repair (MTTR), an essential feature in remote or rural locations such as PM-KUSUM sites.

Grid Compliance: These inverters meet Indian grid code requirements, including LVRT, HVRT, and reactive power support, key for grid-connected utility-scale projects.

String inverters have become the backbone of India’s ground-mounted and distributed solar growth. Thanks to their flexibility, efficiency, and ease of maintenance, they are rapidly replacing traditional central inverters even in large-scale projects.

If you’re planning a utility-scale solar plant or implementing a PM-KUSUM installation, the top contenders in the Indian market today include:

• Hopewind Inverter – for high-capacity, rugged installations in high-temperature zones
• Sungrow SG320HX – for balanced performance, digital support, and global reliability
• WattPower 330KTL-H1 – for efficient, intelligent, and future-ready solar plants

By choosing the right string inverter based on capacity, MPPT count, temperature performance, and digital features, EPCs and developers can ensure long-term reliability and maximum ROI in India’s fast-evolving solar sector.

Also Read:

Best Commercial Grid-Tie Solar Inverters in India (2025)

How to Choose the Right Solar Inverter: A Comprehensive Guide

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