The Rajasthan government has directed distribution companies (DISCOMs) to ensure that all single-phase rooftop solar systems are commissioned after conducting proper phase balancing at the distribution transformer level.

The government said that allocation of rooftop solar connections must be made on the least-loaded phase, and periodic phase re-shuffling must be carried out.

However, it emphasized that DISCOMs must ensure that the phase-balancing work does not delay the commissioning of rooftop solar projects.

The government expressed concerns that single-phase rooftop solar projects of up to 5 kW are being commissioned by DISCOMs on a large scale, leading to unplanned concentration of single-phase solar systems on the same phase. Such uneven phase loading can also lead to reverse power flow.

The government highlighted that such unbalancing could also cause a rise in voltage, tripping of solar inverters, overheating of distribution transformers, neutral overloading, deterioration of power quality, and increased technical losses, particularly in areas with high rooftop solar penetration.

To ensure grid stability, the Jaipur Vidyut Vitran Nigam recently issued an order allowing consumers to install hybrid inverters alongside their rooftop solar systems under the net metering, gross net metering, and virtual net metering frameworks. The order highlights the growing importance of battery energy storage systems for grid stability, peak-load management, and power-quality improvement.

According to a report by the Central Electricity Authority (CEA), transmission utilities reported 17 cases of power transformer failures at 220 kV and above between January and June 2025.

According to Mercom India Research’s Q4 & Annual 2025 India Rooftop Solar Market Report, India’s rooftop solar capacity grew to 7.1 GW in the calendar year 2025, an over 123% year-over-year jump from 3.2 GW in 2024. Residential consumers accounted for almost 76% of the total rooftop solar installations in 2025.

Subscribe to Mercom’s real-time Regulatory Updates to ensure you don’t miss any critical updates from the renewable industry.