Choosing an EV charger: start with the site, not just the kW
A useful charger specification starts with the vehicles, the energy they need and the time they spend parked. Rated power is one input; compatibility, site capacity and support determine whether the installation works in practice.
Describe the job the charger must do
Before requesting a quotation, write a short use-case brief. Who will charge: employees, hotel guests, passing drivers or a returning fleet? How long do they normally park? Is the goal to replenish energy during an existing stop or provide a dedicated charging stop? How many vehicles need to charge at the same time?
These questions turn a broad request such as “I need a 30 kW charger” into a requirement a supplier can evaluate. The number of parking spaces is not automatically the required number of charging ports. Arrival patterns and simultaneous demand matter, and an installation can be planned to expand if demand develops.
Distinguish power from energy
Kilowatts describe power; kilowatt-hours describe energy. As an idealised example, delivering 15 kWh at a constant 30 kW takes half an hour. That arithmetic is not a charging-time guarantee. Actual power can change during a session, and energy taken from the grid is not necessarily the same as energy stored in the battery.
The vehicle, its state of charge, battery conditions and the charging equipment affect the result. For AC charging, the vehicle's onboard charger also limits the power it can accept. Ask for a realistic assessment for the intended vehicle models instead of assuming every compatible vehicle will use the equipment's full nameplate power.
Match the equipment to the stop
Long parking periods can support a different charging approach from a short roadside stop. The U.S. Department of Energy identifies dwell time and location needs as relevant planning factors for public charging. The general principle is useful elsewhere, but U.S. electrical ratings and connector conventions should not be treated as an installation specification for India.
List the actual vehicle models and connector requirements in the brief. Ask the supplier to confirm compatibility in writing. For a mixed fleet, assess the mix rather than assuming that one connector or one power level covers every vehicle. A higher-rated unit is only useful if the intended vehicles and site can use the capability.
Make the site survey part of the decision
A qualified electrical assessment should establish the available supply, other building loads, cable routes, protection, earthing, metering and any required approvals. This article is a planning checklist, not an electrical design. The final installation must follow applicable local requirements and the equipment manufacturer's instructions.
Include civil works, communications, access and future expansion in the scope discussion. Ask who is responsible for each item, what is excluded and what depends on the utility. Do not compare equipment-only quotations as though they were complete installed costs. A clear scope is more useful than a headline number with missing work.
Specify the operating experience
Ask how drivers find the site, see instructions, start a session and obtain help. Confirm what the operator can monitor, how faults are reported and who responds when charging fails. Request the warranty and service terms for the quoted product rather than relying on a general promise.
For a ChargeMOD enquiry, send the site location, intended vehicles, typical parking duration, expected simultaneous demand and any available electrical survey. Current model specifications and prices should come from an up-to-date datasheet and quotation. Raman's AI twin can help structure the discussion; it does not have a live product catalogue or authority to issue a quotation.
Sources & editorial notes
- U.S. Department of Energy: charging equipment and factors affecting charging time
- U.S. Department of Energy: public charging and dwell time
- ChargeMOD: official company and product enquiry routes
Technical references provide general charging principles. Confirm India-specific electrical requirements and current product details with the qualified installer and supplier.
Prepared with AI assistance for Raman Unni’s website. This guide does not quote Raman or disclose internal company data. Published 2026-10-10.