Solar + BESS in Maharashtra: The ₹6.20/Unit Peak Arbitrage Unlocked by the 2026 RE Policy

Executive Summary

For Commercial & Industrial (C&I) consumers in Maharashtra, the math on renewable energy just fundamentally changed. On 18 March 2026, the state notified its Renewable Energy and Energy Storage Policy for FY 2025-36. This was not an incremental update; it was a structural reset for every heavy-power manufacturing plant in the region.

The policy effectively eliminated ₹1.30–1.70/unit in grid charges for stored energy, wiping out Cross-Subsidy Surcharge (CSS), wheeling charges, transmission charges, and electricity duty. When combined with peak tariff arbitrage, it unlocks a massive ₹4.30–6.20 per unit advantage on every single unit stored.

Here is the exact boardroom breakdown of how this policy transforms Battery Energy Storage Systems (BESS) from a capital expense into a primary wealth creation vehicle.

The Catalyst: A Structural Reset for MH Industries

Historically, when CFOs evaluated Solar + BESS, the upfront capital cost of the battery often diluted the overall project IRR. The grid charges levied on the charging and discharging cycles eroded the margins.

The new FY 2025-36 policy aggressively dismantles these barriers. Five massive regulatory shifts happened simultaneously:

• Storage is Now Mandatory: Any new RE project above 100 kW commissioned from 1 April 2026 must incorporate storage.
  
• Grid Charges Eliminated: Every single grid charge on energy storage has been completely waived.
  
• The Decade-Long Holiday: Captive RE combined with BESS secures a full 10-year electricity duty holiday.
  
• Aggressive State Targets: Maharashtra has committed to drawing 65% of its power from renewable energy by FY 2036, expanding capacity from 31 GW to 100 GW.
  
• The DISCOM Mandate: DISCOMs are now strictly mandated to procure 100 GWh/day of storage by FY 2036.

The Forensic Audit: Decoding the ₹6.20/Unit Advantage

A high-level policy announcement requires forensic translation to understand the direct impact on your factory’s bottom line. Here is exactly what the new regulatory framework means for your daily operations.

For a heavy-power factory, the peak grid tariff during the 17:00–24:00 window is punishing—typically hitting ₹7.50–9.50/unit, further amplified by a 25% Time of Day (ToD) surcharge.

Under the new policy, your operational model flips:

1. Generate and Store: Your surplus solar generated during the off-peak 09:00–17:00 window gets stored in the BESS.
   
2. Discharge and Settle: That stored power is then discharged to settle your massive peak tariff loads during the 17:00–24:00 window.

The CFO Math:

• The Charge Exemption: By avoiding CSS, wheeling, and transmission on stored power, you secure a direct ₹1.30–1.70/unit saving.
  
• The Peak Arbitrage: By bypassing the ₹7.50–9.50 peak grid + ToD rates, you capture a ₹3.00–4.50/unit arbitrage.
  
• The True Landed Advantage: Your combined financial advantage is exactly ₹4.30–6.20 per unit on stored energy.

The Verdict: Stacking Exemptions for a Decade

The narrative in the boardroom must evolve. If you are an industrial consumer in Maharashtra evaluating your renewable strategy, looking solely at daytime solar savings is now a strategic blind spot. The real wealth creation lies in peak storage arbitrage.

Furthermore, if you structure this asset as a Group Captive project under Gazette 180, these three massive exemptions stack concurrently for an entire decade, legally shielding your peak operations from grid inflation.

Next Steps for the Boardroom

If you are an industrial consumer in Maharashtra evaluating your renewable strategy, looking solely at daytime solar savings is now a strategic blind spot. Standard “savings” models are no longer enough; you need a compliance-backed strategy engineered to capture the ₹6.20/unit peak arbitrage under the new 2026 framework.

If you want us to run a Techno-Commercial Wealth Audit for your manufacturing plant and build the legally bulletproof “one slide” your Board needs to see to approve this transition, connect with us to reserve your strategy session today.

About Infinia Solar

Infinia Solar is India’s leading buy-side renewable-energy advisory. We help large Commercial & Industrial buyers procure the right renewable energy — from the right developers, on the right PPA terms — representing the buyer, never the developer.

We’ve advised 65+ corporates across 19 states, enabling 1.6 GW of solar, wind and hybrid capacity and ₹6,500 Cr of projects across 150+ PPAs with 40+ developers — and zero portfolio defaults.