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Comparing AC EV Charger Manufacturers in India: A Buyer's Checklist

The questions worth asking any Indian AC EV charger manufacturer before a multi-year deployment — for CPOs, fleet operators, and white-label brands — with Tech OVN's own answer to each.

The summary, if you skip the rest

Many AC EV charger manufacturers buy a generic third-party metering module and bolt it inside the charger. That module is accurate on day one and drifts 2-3% by year five in field conditions. For a CPO fleet of 200 chargers each dispensing 30 kWh/day, a 2% drift is real revenue lost — and it's invisible until a tenant audit or billing dispute catches it.

Tech OVN's primary business is designing and manufacturing energy meters — including utility smart meters for the Indian market. The same engineers design every Tech OVN charger's metering board. Sustained accuracy across the 7-10 year deployment lifetime is what that buys you.

Beyond the meter, Tech OVN publishes its commercial terms in plain English (no MOQ on catalogue chargers, single units from stock; MOQ 200 on white-label, 4 weeks from PO), helps with OCPP integration, doesn't offer subsidy filing, and designs chargers that don't need on-site servicing.

What to ask a manufacturerWhy it mattersTech OVN's answer
Who designs the built-in energy meter?The meter bills every kWh. A bought-in generic module can drift in the field; an in-house design can be characterised and supported.Designed in-house by the team that builds our utility smart meters
What accuracy class is the built-in meter, and how does it hold up over years?Billing disputes in year five are settled on the meter's reading, not its day-one datasheet.Class 1.0, holding inside its accuracy band across the deployment lifetime
Which OCPP versions ship today?Your CSMS may run 1.6J now and move to 2.0.1 later.OCPP 1.6J and 2.0.1, both shipping today
Will they help integrate with my backend?Integration effort decides how fast chargers go live on your platform.We help with OCPP integration, and can adapt firmware for bulk orders
MOQ and lead time for catalogue units?Pilots and small sites need single units without waiting on a production run.No MOQ; single units ship from stock; 200+ units in 4 weeks from PO
MOQ and lead time for white-label / OEM / ODM?Your launch plan depends on a stated MOQ and a clear lead-time start date.MOQ 200 units, 4 weeks from PO
Which connectors are offered?Cars use Type 2; 2W/3W and basic home charging often use a 3-pin or IEC 60309 socket.Type 2 (IEC 62196), 3.3–22 kW; 3-pin 15A or IEC 60309 on the 3.3 kW single socket
What does servicing look like?A fleet that needs scheduled site visits needs a service budget and a service team.Sealed enclosure, no field-replaceable parts — swap-and-RMA
Do they file state subsidy paperwork?Know up front who owns the subsidy application.No — we supply hardware and technical documentation; the buyer files
Where is it manufactured?Local design and manufacture shortens support loops.Binola, Haryana (Delhi NCR) — same site as our meter line
What testing do the chargers carry?Ask for the actual test report, not a list of standards.Type-tested to IS 17017 (BIS); designed to IEC 61851-1; IP55; IEC 62196 Type 2 connector

What Tech OVN offers

Six things to weigh when you shortlist us.

Metering accuracy that lasts

The meter inside every charger is built by the team that builds Tech OVN's utility smart meters. Accuracy holds across the 7-10 year deployment lifetime, not just day one.

Commercial transparency

Published commercial terms — no MOQ on catalogue (single units from stock), MOQ 200 on white-label, 4 weeks from PO for white-label and large orders.

No on-site servicing burden

Sealed-enclosure design means no scheduled maintenance and no service contracts. If a unit fails, we ship a replacement; the failed unit returns to our facility.

Clear scope

We help with OCPP integration and can adapt firmware for bulk orders. We don't do subsidy filing, site surveys or civil work — and we say so up front.

Vertical integration

Metering board, controller board, enclosure, and firmware are all designed and built at the same Haryana facility. No three-vendor finger-pointing when an integration issue surfaces.

Part of the OVN Engineers group

Tech OVN has made energy meters since 2019 and is part of the OVN Engineers group (power & water, est. 1949).

When another manufacturer is the right choice

We don't fit every buyer. A few scenarios where another manufacturer is the better match:

  • •You need a DC fast charger (50 kW+). Tech OVN currently manufactures only AC chargers (3.3-22 kW); a DC-only buyer should look elsewhere.
  • •You need a turnkey installer who also does site surveys and civil work. We supply hardware and help with OCPP integration; installation is done by your contractor.
  • •You need a manufacturer to file your state EV subsidy paperwork. Tech OVN doesn't offer subsidy filing; the buyer or their installer handles it.
  • •You need fewer than 200 branded white-label chargers. Catalogue chargers ship with no MOQ; branded programmes start at MOQ 200.

Frequently Asked Questions

Tech OVN designs and manufactures the energy meter inside every charger in-house — the same engineers who build Tech OVN's utility smart meters design every charger's metering board. Many AC EV chargers use a generic third-party metering module that is accurate on day one but drifts 2-3% by year five in field conditions. The Tech OVN meter holds inside its accuracy band across the 7-10 year deployment lifetime — the difference between a profitable charger fleet and one that quietly leaks billing revenue.
Because the meter is the instrument that bills every kWh dispensed. A 2% drift on a CPO fleet of 200 chargers each dispensing 30 kWh/day is real revenue lost — and it is invisible until a tenant audit or billing dispute catches it. Manufacturers without an in-house metering function source generic modules whose drift behaviour at year 3-5 is not characterised. Tech OVN's modules are characterised on the same test bench as our utility meters.
No MOQ on catalogue / unlabelled chargers — single units and regular orders ship from stock; large quantities (200+ units) take 4 weeks from PO. MOQ 200 units on white-label, OEM, and ODM programmes, 4 weeks from PO. OCPP 1.6J and 2.0.1 supported, and we help with OCPP integration (firmware adaptation for bulk orders). No state EV subsidy filing. Chargers are designed for zero on-site servicing — sealed enclosures, swap-and-RMA on failure. Warranty is 2 years from dispatch.
No. Tech OVN currently manufactures AC chargers only — the 3.3 kW single socket and the Type 2 range from 3.3 kW to 22 kW. A buyer who needs DC fast charging (50 kW and above) should look elsewhere.
Our Type 2 chargers are type-tested to IS 17017 (BIS); the 3.3 kW single-socket charger is type-tested at an NABL-accredited lab. They are designed to IEC 61851-1 (EV charging safety), with IP55 ingress protection, IEC 62196 Type 2 connectors on the Type 2 range, and built-in Class 1 metering designed to IEC 62053. For an export programme, tell us the target market and we will tell you what testing it needs.
Ask the manufacturer who designed and manufactures the metering board. If the answer is a third-party module, ask for the supplier's drift characterisation report at 3-5 years under outdoor enclosure conditions. Most third-party module datasheets only specify accuracy at calibration; field-drift data is rarely published. A manufacturer with in-house metrology can answer this; one without cannot.
Tech OVN's primary business is designing and manufacturing energy meters — see the Titan smart energy meter range and the utility-meters section. The Class 0.5S Titan meters and our utility smart meters are built by the same metering team that designs every charger's built-in meter.

Evaluating Tech OVN for your charger deployment?

Talk to our team about MOQ, lead time, custom enclosure, and OCPP requirements — or read the full white-label / OEM / ODM programme details.

Request QuoteSee White-Label Programme