Planning EV Charging Infrastructure in India: Investment, Site Selection, Power Requirements and Project Execution

Most people researching EV charging infrastructure start with charger specifications. That's the wrong starting point , charger selection should follow the site's demand, electrical and operational requirements, not drive them.

What determines whether a charging investment pays off is the work that happens before any equipment is ordered: assessing demand, selecting the right site, sizing the electrical system, budgeting realistically, and executing without vendor coordination failures. This guide covers that sequence , investment, site selection, power requirements, and execution , in the order it should actually happen.

India's EV Charging Policy Landscape

India's national EV charging framework, issued by the Ministry of Power, along with supporting schemes such as PM E-DRIVE, sets out provisions for electricity connections, charging density, tariffs and interoperability. State DISCOMs apply their own local conditions on top of this, so treat national guidelines as the baseline and confirm specifics with the relevant state authority before finalizing a project.

Demand Assessment: Who Will Actually Use the Charging Station?

Before any load calculation, define the vehicle mix a station will realistically serve. A station near a logistics park behaves nothing like one inside a shopping mall.

Establish whether the location is a dwell-time site (office, mall, hotel) or a transit site (highway, arterial road); the dominant vehicle category , two-wheelers, cars, fleet vans, or heavy commercial EVs; and whether there's a captive user base (employees, a fleet contract) or primarily walk-in traffic.

This distinction , dwell-time versus transit , shapes charger type, power rating, land layout and revenue model. A mismatch between site demand and installed capacity is a frequent cause of underperformance.

How to Select an EV Charging Station Site

A technically sound electrical design on a poorly chosen site will still underperform. Site screening should evaluate:

1. Existing electrical capacity nearby , spare transformer/feeder capacity, or need for augmentation
2. Vehicle dwell time relative to planned charger type
3. Access and visibility, including turning space for larger commercial EVs
4. Land area matched to configuration , a compact urban AC/DC setup needs far less space than a highway hub with high-power chargers and bus/truck bays
5. Expansion room for additional chargers, solar, or battery storage
6. Nearby demand generators , logistics hubs, bus routes, retail footfall, residential density
7. Safety clearances, particularly near fuel-dispensing infrastructure
8. DISCOM coordination lead time, factored into the schedule
9. Competitor charging availability , existing chargers, uptime, pricing, distance between stations
10. Traffic conversion potential , EV traffic weighted by likelihood of stopping and charging need, not raw volume alone
11. Future EV demand , projected adoption, fleet electrification plans, nearby industrial or residential development

Consult With An EV Expert: https://www.imarcengineering.com/contact?service=ev-charging-infrastructure-advisory 

How to Calculate EV Charging Infrastructure Power Requirements

Start with connected load , the sum of every charger's rated output. Four 60 kW DC chargers plus two 240 kW chargers gives a connected load of:

(4 × 60) + (2 × 240) = 720 kW

Connected load is rarely actual demand, since chargers seldom all run at full power simultaneously. Maximum demand should come from a detailed load study considering charger diversity, simultaneous charging behaviour, vehicle arrival patterns, operating hours, load-management strategy and auxiliary loads , not a generic assumption applied across every project.

Sizing a transformer for the full connected load without this study is a common way developers overspend; sizing it without margin risks voltage drops and protection trips at peak hours. An actual electrical study, not a rule of thumb, should determine the final rating.

LT/HT Connection, Transformer and Grid Planning

Under India's EV charging framework, stations can obtain a Low Tension (LT) connection for loads up to 150 kW, subject to applicable DISCOM provisions. Higher loads may need an HT connection or other arrangements depending on state regulations, sanctioned load and local network capacity , this varies by DISCOM and should be confirmed early, not assumed.

Connection timelines are intended to be faster in metro and municipal areas and longer in rural areas, extending further where network augmentation such as a new substation is required. A DISCOM feasibility check confirming available capacity at the nearest transformer or feeder should happen during site screening, not after land is finalized.

EV Charger Selection by Vehicle and Site Type

Once demand and electrical feasibility are established, configuration follows: AC charging (or moderate DC) for passenger/destination sites; high-power DC (60–240 kW+) for highway/transit sites where speed matters; scheduled high-power charging for fleet and depot sites aligned to duty cycles; and high-capacity DC with dedicated bays for bus and heavy commercial sites.

EV Charging Infrastructure Investment and Cost Components

There's no single meaningful "cost per station" figure , these components move independently and are highly site-dependent:

Any estimate that skips upstream electrical infrastructure , transformer, HT/LT equipment, cabling , incomplete; it is routinely the largest cost category.

Revenue, Utilization and ROI Considerations

At its simplest: Revenue = Energy sold × charging tariff. A credible model layers in sessions per day, average energy per session, charger utilization (energy delivered against theoretical maximum output), electricity and demand-related charges, land cost, O&M, software/payment costs, manpower, and ancillary revenue such as parking, retail or fleet contracts.

From there: EBITDA = charging and ancillary revenue − operating costs, and payback period = initial investment ÷ annual project cash flow. These are simplified planning formulas for structuring a feasibility model, not a guaranteed return , actual figures depend heavily on utilization, which depends on the demand assessment and site selection done earlier.

Solar and Battery Storage for EV Charging Infrastructure

Solar works well where demand overlaps with daylight hours, such as office or destination charging, but poorly on its own for highway or evening-peak sites, since generation and demand don't align.

Battery storage can supplement grid power during high-demand periods and reduce peak draw. In some projects this may defer or reduce grid-capacity augmentation, but the economics should be evaluated against transformer upgrade costs, tariffs, battery CAPEX, cycling requirements and site operating conditions , it is not a substitute for adequate grid capacity in every case.

EV Charging Infrastructure Safety and Compliance Checklist

DISCOM connection and metering approval, electrical safety compliance and equipment standards, fire-safety requirements and testing, local authority and land/lease permissions, highway or right-of-way permissions where applicable, interface requirements near fuel-dispensing infrastructure where applicable, and electrical inspection before commissioning.

Applicable approvals vary by location, land type, project configuration and state/DISCOM requirements , no single national checklist applies identically everywhere.

Greenfield vs Brownfield EV Charging Projects

EV Charging Infrastructure Project Execution

• Pre-construction: site survey, DISCOM feasibility, geotechnical/civil assessment, concept design, load study, BOQ, approvals
• Engineering: single-line diagrams, load schedule, cable and transformer sizing, protection coordination, earthing, civil and charger layout
• Procurement: technical specifications, vendor evaluation, factory acceptance testing, delivery schedule, warranty and AMC terms
• Construction: civil works, transformer and panel installation, cabling, charger installation
• Commissioning: insulation, earthing and protection testing, charger and communication testing, payment system testing, load-management and emergency shutdown testing

Multi-Vendor Coordination and Project Risks

Charging projects typically involve a charger supplier, electrical contractor, civil contractor, DISCOM, and often a software or storage vendor. The interfaces between them are a frequent source of delay , chargers arriving before civil or transformer work is ready, cable mismatches, or utility timelines left out of the schedule. A single point of project accountability across these interfaces reduces this risk more than managing each vendor separately.

View Related Insights

1. How To Setup Ev Charging Infrastructure: https://www.imarcengineering.com/blog/setting-up-ev-charging-infrastructure-in-india-a-step-by-step-guide 

2. Ev Battery Manufacturing Setup: https://www.imarcengineering.com/blog/ev-battery-manufacturing-plant-in-india 

How IMARC Engineering Supports EV Charging Infrastructure Projects

IMARC Engineering supports EV charging infrastructure through an EPCM-led approach , feasibility studies, electrical load and transformer sizing, engineering design, procurement support, DISCOM coordination, and execution management through commissioning. For developers, fleet operators, or industrial sites adding charging as part of a wider facility upgrade, our team helps translate demand projections into a right-sized, execution-ready design. 

About IMARC Engineering

IMARC Engineering is an engineering and EPCM consultancy supporting industrial and infrastructure projects from feasibility through commissioning. Our capabilities cover project feasibility, electrical load and transformer sizing, detailed engineering, procurement support, DISCOM coordination, site development, and multi-vendor project management. For EV charging infrastructure, we help developers, fleet operators, and industrial businesses assess demand, select suitable sites, plan power requirements, develop cost-effective infrastructure, and execute projects with coordinated engineering and construction support. Our approach focuses on practical, scalable, and execution-ready solutions aligned with operational requirements, future expansion, and project objectives.

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Phone: +91-120-433-0800

Email: sales@imarcengineering.com 

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