Insolation Energy Limited shares surged 10.2% to ₹3,654.5 on Wednesday after securing its largest contract in history, worth ₹500.5 crore, from Rajasthan Renewable Energy Corporation Ltd. The contract involves the design, supply, erection, testing, and commissioning of Rooftop Solar (RTS) photovoltaic power projects with a capacity of 77 MW on State Government buildings in Rajasthan.