Jaipur-based Insolation Energy Limited, which trades under the INA Solar brand, has landed a ₹558 crore solar module order from NTPC Renewable Energy Limited, the wholly owned renewable energy arm of state-run NTPC Limited. The company disclosed the win in a stock exchange filing on Monday.

Investors reacted fast. INA Solar's stock surged nearly 15% on the news, climbing to ₹124 from Tuesday's ₹110 close. By the time of this report, gains had cooled somewhat, with the stock trading up 9% at around ₹118.

The order lands at a pivotal moment for the company. INA Solar has been under pressure in recent months as it works to stand up its own cell manufacturing operations — a buildout complicated by the ALMM regime, which kicked in on June 1 this year. The company is building a 4.5 GW cell manufacturing facility in Narmadapuram, Madhya Pradesh. Progress there is "satisfactory," according to the firm's most recent update, delivered during its May analyst call. Management remains hopeful of bringing the plant online by December. Still, uncertainty over future cell supply has weighed on the stock in recent weeks.

INA Solar hasn't disclosed the specific technical requirements attached to the NTPC order. But there's a strong case that this batch involves non-DCR modules. NTPC holds one of the largest pipelines of pre-August 2025 solar projects in the country — projects that are exempt from Domestic Content Requirement rules, which mandate the use of domestically manufactured solar cells.

The order also comes against the backdrop of a strong financial year. INA Solar closed FY26 with revenue of ₹2,146 crore, up 61% year-on-year, while profit after tax rose 59% to ₹201 crore. With a healthy cash position and manageable net debt, the company has emerged as one of the standout performers among India's solar manufacturers over the past two years, cementing its place in the sector's top tier.