WattPower has introduced its 506KTL grid-forming utility-scale inverter.
The product was unveiled on the opening day of the ongoing Renewable Energy India (REI) Expo 2026, a company release said
The smart string inverter is specifically designed to help EPCs and renewable energy developers build grid-ready solar projects that remain stable in weak-grid conditions and during severe grid disturbances.
Utility-scale solar projects today are expected to do far more than generate electricity. They must remain stable during grid disturbances, operate reliably in weak-grid environments, and meet evolving regulatory requirements without compromising plant performance. The WattPower 506KTL addresses these challenges directly through its advanced Grid-Forming architecture, which includes virtual inertia support and power oscillation damping. This enables EPCs and developers to reduce project risks, minimize solar curtailment, enhance grid stability, and improve long-term operational performance.
Engineered to improve project returns, the WattPower 506KTL offers 1000V AC and 1600V DC capabilities, significantly reducing power loss and lowering balance-of-system (BoS) costs. By delivering 40 per cent more power density, the inverter helps reduce the overall inverter count, which translates to lower lifetime operating costs and maximized energy generation across the project’s lifecycle.
Advanced grid-support capabilities
- Virtual inertia support & power oscillation damping: Provides essential stability and frequency regulation for weak-grid environments.
- Black-start function: During construction, the inverter supplies AC power for plant commissioning, reducing reliance on costly, polluting diesel generators.
- Low SCR Operation: Ensures continuous, stable operation even in grids with heavily compromised Short Circuit Ratios.
- Night reactive power recovery: After the power grid is restored from a nighttime outage, the inverter’s AC-side relay automatically resets and continues to supply reactive power to the grid, meeting the reactive power requirements.
Next-generation hardware & software features
- AI-enabled monitoring: Delivers real-time intelligence and continuous plant optimization to predict and mitigate faults.
- Hybrid cooling & anti-icing fan: Ensures superior thermal management and dependable operation across extreme and diverse climatic conditions.
- SSLD2 protection technology: Enhances equipment safety, operational reliability, and long-term resilience to maximize plant uptime.
Also read: WattPower introduces 506KTL grid-forming inverter