Battery Energy Storage System (BESS) deployments in India have been constrained by relatively high equipment costs — a significant portion of which is attributable to import duties on lithium-ion battery cells, most of which India still imports from China, South Korea, and Japan. The Union Budget 2026 took a significant step toward changing this, with duty reductions that are beginning to flow through to project economics for C&I buyers.
The Budget 2026 Change
The Union Budget 2026 announced a reduction in the Basic Customs Duty (BCD) on lithium-ion battery cells for stationary storage and EV applications — from the previous 15–20% to a range of 0–5%. This is part of a broader phased approach to battery manufacturing incentives: PLI (Production Linked Incentive) schemes for domestic Advanced Chemistry Cell (ACC) manufacturing are running in parallel, with the expectation that import duty rates will be stepped up again once domestic manufacturing reaches scale (projected 2028–2030).
The window between 2026 and the eventual reimposition of duties as domestic manufacturing scales is effectively a cost window for BESS procurement — making 2026–2027 an optimal period to deploy battery storage at reduced import cost, before domestic manufacturing PLI plays out and duty structure re-normalises.
Impact on C&I BESS Project Economics
Battery cells typically represent 50–60% of a BESS system's total cost, with the balance made up of Battery Management System (BMS), power conversion system (inverter/converter), thermal management, enclosures, and integration. A 10–15 percentage point reduction in BCD on cells translates to a 5–9% reduction in overall BESS system cost.
For a 250 kWh LFP BESS system (typical for a 500 kW rooftop solar paired BESS), the cost has moved from approximately ₹1.1–1.3 crore before the duty change to approximately ₹1.0–1.2 crore post-change — a reduction of ₹10–15 lakh on a ₹100 lakh system. While this alone doesn't transform the economics dramatically, combined with the already-falling LFP cell spot prices from Chinese manufacturers, the total BESS cost trajectory in India is improving by approximately 15–20% year-on-year.
What This Means for IRR on Solar + BESS Projects
For a 500 kW solar + 250 kWh BESS project where the BESS component costs ₹1.2 crore (versus ₹1.35 crore pre-duty change), the project-level IRR improvement is approximately 1–1.5 percentage points — moving a 20% IRR project to 21–21.5%. The payback improvement is approximately 6–12 months. On a cumulative 25-year basis, the NPV improvement is significant.
The Domestic Manufacturing Opportunity
The PLI scheme for ACC manufacturing has attracted investments from Ola Electric, Reliance New Energy, and others. As domestic LFP cell manufacturing scales (targeted at 50 GWh/year by 2030), the delivered cost of Indian-made cells is expected to reach import parity — at which point import duty rates will likely increase to protect the domestic industry. The current window of low import duty is therefore a strategic procurement opportunity for C&I buyers who have been waiting for BESS to become financially viable.
ARIA's BESS Offering
ARIA Green Energy procures BESS systems through established import channels and integrates them with our solar EPC projects. Our BESS specifications default to LFP chemistry (Lithium Iron Phosphate) for stationary applications — chosen for safety (no thermal runaway risk), 4,000+ cycle life (>10 years at daily cycling), and total cost of ownership advantages over NMC chemistry. All our BESS deployments include BMS, remote monitoring via Nextra AI, and a 5-year workmanship plus 10-year cell performance warranty. Reach out to explore a solar + BESS proposal for your site.
Frequently Asked Questions
Ready to Take the Next Step?
Get a free solar assessment and proposal from ARIA Green Energy — no commitment required.