Energy Infrastructure

India’s Renewable Transition Is a Delivery Problem, Not a Capacity Problem

RRahul RanjanOctober 22, 2026 7 min read

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Batteries are a partial fix, not a substitute for wires. ReNew is adding close to 4 GWh of battery capacity [13], which can shift midday solar to evening peak but cannot resolve fundamental grid inadequacies [13]. Legally, batteries lack a distinct identity under the Electricity Act, deterring private investment [11]. S&P’s warning follows: without more state-network investment, curtailment risk rises and utilities depend more on expensive peak-hour power [2].

Storage helps at the margin but costs capital and needs regulatory recognition; thermal backup keeps lights on but locks in fixed costs and lowers efficiency. Doing neither is costliest: the system pays once for renewable energy it cannot use and again for peak power it must buy. Curtailment is not simply lost clean electricity; it signals a mispriced delivery chain.

The Fix Is Not More Plan—It Is Faster Execution and Smarter Operations

India does not have a national transmission shortage on paper. CEA planning for FY36 contains about 16 percent spare capacity relative to the renewable capacity projected in the base case [4]. The broader CEA target for 900 GW of non-fossil capacity by FY2036 includes 627,000 circuit km of lines and 2,171 GVA of substation capacity to be in place by March 2030, with investments of around Rs five trillion to six trillion between FY2027 and FY2032 [14]. That is a planning achievement, not delivery.

The stopgap proves the gap. About 21 GW of variable renewable capacity was being evacuated through Temporary General Network Access as of mid-2026 [5]. Roughly 33% of 54.8 GW of commissioned renewable capacity depended on it [14]. T-GNA keeps electrons moving, but it is temporary access, not firm evacuation capacity.

Government measures such as ISTS charge waivers, quarterly monitoring, potential-based planning, and the Green Energy Corridor are necessary but insufficient [1][5]. Right-of-way and legal delays remain [11]. A simulation on a 75-bus Indian network studied dynamic line rating’s effect on renewable curtailment, thermal fuel cost, and line congestion [12]. Kearney’s diagnosis points to planning, execution, congestion, and digitalisation gaps [3]. These tools are not substitutes for new lines, but they can extract more from the built network. The highest-value reform is to treat planning and operations as one adaptive system: integrated central-state planning, market signals for storage and flexibility, and operational intelligence [6].

The test is not whether the plan is ambitious. It is whether a project can inject power on the day it is commissioned and whether the grid can move that power to load. The number that matters is not 300 GW installed, but the delivered megawatt-hour, hour by hour, at the substation and meter.