Charges, Exemptions & BESS Waivers

Understanding DISCOM Financial Liabilities

When a renewable energy system utilizes the public utility grid to transport, store, or balance electricity, the DISCOM incurs infrastructural costs. To recover these costs, regulatory commissions stipulate various utility charges. However, to accelerate solar adoption, the RERC grants massive exemptions—particularly for domestic consumers and self-owned systems.

Key Regulatory Charges Defined:

• Wheeling Charges & Losses:Essentially a "toll fee" for using the DISCOM's wires. This is only applicable when electricity is generated at one location and transported across the grid to be consumed at a different location (e.g., an off-site Virtual Net Metering or Group Net Metering setup).
• Banking Charges:A fee levied for using the utility grid as a virtual battery. When a consumer injects surplus solar power during the day and withdraws it at night, the DISCOM charges a nominal fee for providing this balancing service.
• Cross Subsidy Surcharge (CSS):In India, commercial and industrial consumers pay higher electricity tariffs to subsidize the cheaper power given to agricultural and low-income domestic users. If a commercial entity uses a third-party RESCO solar plant to drastically reduce their grid consumption, the DISCOM loses that subsidy revenue. CSS is levied to recover this loss.
• Additional Surcharge:A fee applied to recover the DISCOM's fixed costs (like long-term power purchase agreements) that become "stranded" or unused when large commercial consumers shift entirely to solar power.