Sun Wave Knowledge Centre
Guides, case studies, and industry updates to help you make informed decisions about solar energy for your business.
2026 lab records pushed perovskite-silicon tandem solar cells past 32% certified efficiency. Here's what the research says, and why C&I buyers in India shouldn't wait for it.
RRECL's draft SOP requires 2-hour BESS at 5% of capacity for Rajasthan renewable projects above 5 MW. Here is who it affects and what compliance requires.
India's 2026 inverter shake-up: MNRE's data-localisation mandate, CEA's AI islanding test, SiC/GaN efficiency gains, and the Khavda outage pushing grid-forming inverters into new BESS rules.
UPERC repealed its 2022 captive verification rules to align with central Electricity (Amendment) Rules, 2026. Here is what changed for UP captive and group-captive solar.
MNRE's 18 July 2026 OM lets net-metering and open-access solar projects commission with non-ALMM-II cells until 31 December 2026. What C&I buyers must do before the deadline.
CEA's 2026 BESS safety standards, VGF status, the proposed ALBM battery list and Rajasthan's behind-the-meter BESS rules for C&I solar-plus-storage buyers.
Haryana open access solar FY2026-27: wheeling ₹0.73, CSS ₹1.45, surcharge ₹1.37/unit. Full charge stack, worked landed cost example, group captive exemptions, banking rules. Verified Oct 2026.
Open-access and captive users face a 35.95% Renewable Consumption Obligation in FY2026-27, with a distributed RE carve-out. Shortfall reports due 31 Dec 2026.
NPCL rooftop solar for Greater Noida factories: UPERC net billing (not net metering), 2 MW cap, Solar Injection Compensation, fees and FY 2026-27 tariffs.
RERC DREGS 2021 net metering/net billing for Rajasthan factories: 1 MW cap, 100% sanctioned load, 80% DT rule, export settlement and the 2025 VNM/GNM amendment.
115BAA keeps the 40% solar accelerated depreciation but drops the 20% additional depreciation. Old regime vs 22% regime worked example on a ₹1 Cr plant.
Delhi C&I rooftop solar: DERC net metering (July 2026 rules), ₹1/kWh GBI for C&I, group/virtual net metering, green open access at 100 kW, and realistic ROI.