ReNew Energy Global Plc is facing significant challenges as India's grid infrastructure struggles to accommodate the growing supply of solar power during peak daytime hours. According to CEO Sumant Sinha, the company is seeing as much as 15% of its solar electricity curtailed on certain days, directly impacting profitability. The grid's delays in build-out have resulted in interruptions that force ReNew to reduce generation, particularly concerning as demand is expected to surge during the upcoming summer. Last year, up to 40% of solar power output faced curtailment on certain days due to grid constraints, as reported by the Grid Controller of India Ltd. In response, ReNew is accelerating investments in battery storage, aiming to install nearly four gigawatt-hours of capacity to store excess daytime electricity for later use. Additionally, the company is contending with rising shipping costs linked to the Iran conflict, which have affected the delivery of essential raw materials for solar panel production. Despite these challenges, Sinha believes the cost impact is manageable and temporary, while the company plans to focus more on solar energy due to declining wind speeds.