What is the difference between Level 2 AC and Level 3 DC charging?

Level 2 AC charging delivers alternating current to the vehicle, and the vehicle's onboard charger converts it to DC for the battery — limited by the onboard charger size (typically 3.3 to 22 kW). Level 3 DC fast charging bypasses the onboard charger, delivering DC directly to the battery at 25 kW to 350 kW, giving much faster charge times.

Which EV charging level do I need at home?

For most Indian homes, a Level 2 AC charger at 3.3 kW (single-phase) or 7.4 kW (where supply allows) is ideal — it fully charges typical EV batteries overnight. 22 kW 3-phase charging is useful for larger batteries or multi-car households but requires a 3-phase connection.

What is the Bharat AC-001 standard?

Bharat AC-001 is an India-specific 3.3 kW AC charger standard for two- and three-wheelers and small four-wheelers. It was developed when Type 2 was considered overkill for small EVs. Modern deployments typically standardise on Type 2 AC and Bharat DC-001 or CCS2 for DC.

What is the CCS2 connector?

CCS2 (Combined Charging System Type 2) is the European-origin DC fast charging connector, now the primary standard for Indian passenger EVs. It combines Type 2 AC pins with two large DC pins in a single connector, supporting up to 350 kW DC. Tata, MG, Hyundai, Kia, and Mahindra all use CCS2.

What is GB/T charging?

GB/T is the Chinese national standard for EV charging, used on some imported Chinese EVs and buses. It has a separate AC connector and a DC connector. In India, GB/T is primarily seen on commercial electric buses from BYD, Foton, and similar origins.

How long does each EV charging level take?

Rough guide for a typical 50 kWh EV battery: Level 1 (2.3 kW) around 22 hours; Level 2 3.3 kW around 15 hours; Level 2 7.4 kW around 7 hours; Level 2 22 kW around 2.5 hours; Level 3 DC at 50 kW around 1 hour for 20-80% SOC; Level 3 DC at 150 kW around 25 minutes for 20-80% SOC.

Is there a Level 4 EV charging?

Formally no — the IEC/SAE standards define Level 1, 2, and 3 (or Mode 1–4 in IEC terminology). Ultra-fast DC charging at 350 kW+ and megawatt-class charging (MCS) for trucks are sometimes informally called 'Level 4' but they are technically DC fast charging at very high power.

What Are the Different Levels of EV Charging?

The different levels of EV charging define how fast an electric vehicle can be charged, what connector it uses, and whether power is delivered as AC (with conversion inside the vehicle) or DC (directly to the battery). Understanding the levels of EV charging matters whether you are choosing a home charger, specifying chargers for a commercial fleet, or planning a public charging station. This guide covers Level 1, Level 2, and Level 3 DC fast charging, the major connector standards including Type 2, CCS2, CHAdeMO, GB/T, and the India-specific Bharat AC-001 and Bharat DC-001 standards.

Level 1 — Trickle AC Charging

Level 1 charging uses a standard domestic socket (typically 15A in India, delivering ~2.3 kW). The EV's onboard charger accepts single-phase AC and converts it to DC for the battery. Charge time for a 50 kWh battery is approximately 22 hours.

Power: 1.4–2.3 kW
Connector: regular 15A domestic socket with portable cable
Use case: emergency top-up, two-wheelers and three-wheelers, overnight charging for small EV batteries
Pros: zero infrastructure cost, works anywhere
Cons: too slow for daily use on large four-wheelers

Level 2 — AC Fast Charging

Level 2 is the workhorse of EV charging — installed at homes, workplaces, and commercial destinations. Power ranges from 3.3 kW (single-phase) to 22 kW (3-phase). The EV's onboard charger converts AC to DC; peak power is limited by the onboard charger (most modern EVs support 7.4 kW or 11 kW; premium EVs support 22 kW).

Power: 3.3–22 kW
Connectors: Type 2 (Mennekes) is the dominant global and Indian standard; Bharat AC-001 is an India-specific 3.3 kW variant; Type 1 (SAE J1772) is legacy North American
Charge time for 50 kWh battery: 7 hours at 7.4 kW, 2.5 hours at 22 kW
Use case: home charging, workplace charging, destination charging (hotels, malls, restaurants, offices)

For home and commercial Type 2 chargers, see the Tech OVN Type 2 charger page. For single-socket commercial 3.3 kW deployments (ideal for two-wheeler and three-wheeler fleets), see the single-socket charger.

Level 3 — DC Fast Charging

Level 3 chargers bypass the onboard charger and deliver DC power directly to the battery, enabling much higher charging rates. Power ranges from 25 kW to 350 kW, with 50–150 kW being the most common commercial range. Three major connector families exist:

CCS2

Combined Charging System Type 2 is the European-origin standard, now dominant in India. It uses the Type 2 AC connector with two additional DC pins below, allowing one port to handle both AC and DC charging. Supports up to 350 kW. Standard on Tata, MG, Hyundai, Kia, Mahindra, and most other Indian passenger EVs.

CHAdeMO

The original DC fast charging standard from Japan. Supports up to 400 kW and vehicle-to-grid (V2G). In India, CHAdeMO is the legacy standard on Nissan Leaf imports and early EV deployments. MoP guidelines still require CHAdeMO support at public fast chargers alongside CCS2, though its share is declining.

GB/T

The Chinese national standard. Supports up to 250 kW DC. In India, found primarily on Chinese-origin electric buses (BYD, Foton, etc.) and some commercial three-wheelers. Public charging stations serving electric bus fleets typically deploy GB/T-capable chargers alongside CCS2.

Bharat Standards

India developed Bharat standards (Bharat EV Charger) for cost-effective charging of the two-wheeler, three-wheeler, and small four-wheeler segments that dominate Indian roads:

Bharat AC-001: 3.3 kW AC, IEC 60309 industrial connector. Single-phase. Used for two/three-wheelers and small four-wheelers.
Bharat DC-001: 15 kW DC, GB/T connector adapted for India. Low-cost DC fast charging for buses and three-wheelers.

New public deployments in India tend to standardise on Type 2 AC and CCS2 DC as the primary pair, with Bharat standards used for specific fleet applications.

Charge Time Summary

For a 50 kWh battery EV (typical passenger car), approximate charging time from 10% to 80% state-of-charge:

Level 1 (2.3 kW): ~15 hours
Level 2 at 3.3 kW: ~10 hours
Level 2 at 7.4 kW: ~5 hours
Level 2 at 22 kW: ~1.6 hours
Level 3 DC at 50 kW: ~45 minutes
Level 3 DC at 150 kW: ~20 minutes
Level 3 DC at 350 kW: ~12 minutes (if the EV supports it)

Actual times depend on battery chemistry, state-of-charge curve, temperature, and the vehicle's peak DC acceptance rate.

Which Level to Deploy Where

A practical deployment guide:

Home — Level 2 at 3.3 or 7.4 kW (Type 2).
Workplace — Level 2 at 7.4 or 22 kW per bay.
Destination (malls, hotels, restaurants) — Level 2 at 7.4 or 22 kW, optionally with one DC fast charger.
Highway / public fast — Level 3 DC at 50–150 kW (CCS2 + CHAdeMO).
Two/three-wheeler fleet — Level 2 3.3 kW single-socket, or Bharat AC-001.
Electric bus depot — Level 3 DC at 100–350 kW (CCS2 or GB/T depending on bus origin).

Whatever you deploy, meter it. Per-charger kWh tracking and cost allocation is critical for CPO revenue and commercial compliance — see the EV charging metering solution page.