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New power lines and batteries aim to make renewable electricity usable

English हिंदी ಕನ್ನಡ മലയാളം தமிழ் తెలుగు

First brief 2 Oct, 2:38 pm IST Updated 2 Oct, 2:38 pm IST 0 developments 3 min read

Solar plant in Telangana; file photo — Thomas Lloyd Group · CC BY-SA 4.0

Where it stands

A solar plant may produce electricity that customers cannot use because the connecting power lines are too crowded. The Union Cabinet has approved a programme to address that problem. Green Energy Corridor Phase III will expand transmission within states and add batteries that can save electricity for later use. The programme aims to connect up to 135 GW of renewable generating capacity by 2032–33. It also includes 50 GWh of battery storage. These are different measures: the first describes generating capacity, while the second describes how much energy batteries can hold. The estimated cost is ₹1,86,405 crore, including ₹54,082 crore in central financial support. For a renewable-power producer, a better connection can mean less generation being cut back because the network cannot carry it. Storage can also help make daytime solar power available after sunset. Homes and factories benefit only as projects are built and put into service. Cabinet approval does not mean these lines already exist or that electricity bills will fall immediately.

Background

Electricity must travel from the place where it is generated to the place where someone needs it. Large transmission lines carry it over distance. Substations connect parts of the network and change voltage so electricity can move through the system safely. Building a solar or wind farm is therefore only part of the job. Its output needs a route into the wider grid. If the nearby network has too little capacity, operators may have to limit generation even when sunlight or wind is available. More generating equipment alone cannot remove that bottleneck. Renewable generation also changes with the weather and time of day. Solar output falls after sunset, although people still need electricity. A battery can charge when power is available and supply some of it later. Transmission solves the problem of moving power; storage helps with the mismatch between production and demand over time. Earlier Green Energy Corridor phases already supported renewable-power connections. Phase II, for example, covers transmission work in seven states to integrate about 20 GW. The new phase expands the ambition and includes a large storage component. Its success will depend on completing both the network and the supporting equipment, not simply approving more power plants.

How it developed

30 September 2026; Cabinet approval

How it started
States must turn the Cabinet approval into working connections

The Cabinet approved the third phase on 30 September 2026. State transmission utilities will oversee implementation. New transmission projects are to use competitive bidding, while upgrades to existing networks follow a different cost-based route. Central support is intended to reduce the burden of transmission charges. But funding approval is only the beginning. Projects still need to be awarded, built and connected. Batteries must also be installed where they can ease congestion or shift electricity to hours when it is needed. The programme therefore addresses a gap between building renewable generators and making their electricity available to users. It does not itself guarantee round-the-clock renewable supply to every household.

Press Information Bureau Ministry of New and Renewable Energy Business Standard

Why it matters for UPSC

GS3 · Renewable energy and infrastructure

For GS3, connect renewable capacity with transmission, storage and reliable electricity supply. Explain why a completed solar plant can still face limits on selling power. Distinguish GW from GWh and a sanctioned project from an operating service.

Key terms

Transmission gridThe network that carries large amounts of electricity between generating stations and other parts of the power system. Local distribution networks then deliver it to users. A shortage of transmission capacity can limit how much power a plant sends out, even when the plant could generate more.

Intra-state transmissionTransmission within a state, as distinct from links crossing state boundaries. Both parts need enough capacity. A strong national connection cannot fully solve the problem if electricity cannot travel from a local renewable plant to that connection.

Battery energy storageEquipment that stores electricity as chemical energy and later releases it as electricity. In this programme, batteries can help shift renewable energy to other hours or ease network congestion. Storage moves energy through time; it does not create an extra source of energy.

GW and GWhA gigawatt measures power: the rate at which equipment can generate or deliver energy. A gigawatt-hour measures an amount of energy. A battery supplying 1 GW for 1 hour delivers 1 GWh. Its energy capacity alone does not tell us its maximum output rate.

CurtailmentA deliberate reduction in electricity generation below what a plant could otherwise produce. It may be necessary when the grid cannot carry or absorb the power. More transmission and suitable storage can reduce this waste, but they cannot remove every operational constraint.

Competitive biddingA process in which companies submit offers for a project under stated rules. The authority compares eligible bids before awarding the work. An award creates an obligation to deliver the project; it is not evidence that construction is complete.

Sources (3)

Press Information Bureau · official · Cabinet approves Green Energy Corridor Phase III2 Oct, 2:00 pm
Ministry of New and Renewable Energy · official · Intra-State Green Energy Corridor Phase II2 Oct, 2:00 pm
Business Standard · GEC-III sector-positive, but execution depends heavily on state utilities2 Oct, 2:00 pm