Digital Twins & Solar Tariffs: India 2025–26 Outlook
GST cuts, CERC ToD tariffs, and digital-twin-led O&M gains are stacking up to potentially lower India's effective solar cost by 10–12%.
India's solar market in 2025 is undergoing a significant shift, with policy reforms and the adoption of digital twins (DTs) driving competitiveness in tariffs.
Policy Reforms Driving Cost Cuts
The government slashed GST on PV modules and wind turbines from 12% to 5%, reducing project costs by ~5%. The composite tax rate for solar projects fell from 13.8% to ~8.9%, delivering 4–5% savings on capex and paving the way for tariff reductions.
Tariff Innovation
The Central Electricity Regulatory Commission (CERC) has mandated Time-of-Day (ToD) tariffs, with rates 10–20% lower during solar hours. Digital twins strengthen this framework by enabling more accurate generation forecasts and real-time monitoring, ensuring tariffs reflect true system value.
Offsetting Global Trade Pressures
U.S. tariffs of 50% on Indian solar panels have slowed exports and raised oversupply risk in the domestic market. Developers are turning to DT-led efficiency gains to counterbalance rising trade risk and maintain tariff competitiveness.
Operational Efficiency with Digital Twins
- Wattch's 2025 platform enables rapid detection of underperforming PV strings, cutting O&M costs and downtime.
- Recent research shows DTs improve system resilience under environmental degradation, preserving output over time.
- Indian developers are piloting similar DT frameworks to cut LCOE significantly.
Strategic Impact
With GST relief, ToD tariff reform, and DT-enabled efficiency, India's solar sector is positioned to deliver lower, more competitive retail tariffs. Together, these shifts could reduce the effective cost of solar electricity by 10–12%, securing investor confidence while making clean energy affordable.
References
Mercom India · Reuters · PV Magazine · The Economic Times · Mint · Wattch