Part 2 of 20 • Technology Deep Dive

Charging Speed Levels
& Connector Standards

Understanding the complete spectrum of EV charging — from a household outlet to a 350 kW ultra-fast charger — and the global connector standards that connect vehicles to the grid

Level 1 • AC Slow
1-3 kW
8-24 hrs to 80%
Level 2 • AC Medium
7-22 kW
2-8 hrs to 80%
Level 3 • DC Fast
50-150 kW
20-60 min to 80%
Ultra-Fast • SC
150-350+ kW
10-30 min to 80%

⚡ Charging Technology

The Four Levels of EV Charging

Each level serves a distinct use case — from overnight home charging to ultra-fast highway top-ups that rival petrol station stops

Speed Analogies — VisualizedLevel 1 is like filling a bathtub with a cup... Ultra-Fast is a fire hose. Here's how each level compares in real-world terms.

⚡ Level 1 — AC Slow

Standard Household Outlet

Power1-3 kW

Voltage120-230V AC

Charge (0-80%)8-24 hours

Best ForOvernight home

Install Cost₹25K-1.2L

ConnectorType 1/2

Efficiency85-90%

Grid ImpactMinimal

⚡ Level 2 — AC Medium

Dedicated EVSE / Wall Box

Power7-22 kW

Voltage208-240V AC

Charge (0-80%)2-8 hours

Best ForHome / Work / Mall

Install Cost₹80K-8L

ConnectorType 2 / J1772

Efficiency90-95%

Grid ImpactLow

⚡ Level 3 — DC Fast

Highway / Commercial Station

Power50-150 kW

Voltage200-1000V DC

Charge (0-80%)20-60 min

Best ForHighway / Commercial

Install Cost₹25L-1.2Cr

ConnectorCCS / CHAdeMO

Efficiency90-93%

Grid ImpactSignificant

🔥 Ultra-Fast — Supercharger

Premium Highway Charging

Power150-350+ kW

Voltage800-1000V DC

Charge (0-80%)10-30 min

Best ForHighway / Premium

Install Cost₹80L-4Cr

ConnectorCCS2 / NACS

Efficiency90-95%

Grid ImpactVery High

Parameter	Level 1 (AC Slow)	Level 2 (AC Medium)	DC Fast (Level 3)	Ultra-Fast
Power Output	1-3 kW	7-22 kW	50-150 kW	150-350+ kW
Voltage	120-230V	208-240V	200-1000V	800-1000V
Current Type	AC	AC	DC	DC
Charge Time (0-80%)	8-24 hrs	2-8 hrs	20-60 min	10-30 min
Best For	Overnight Home	Home / Work	Highway	Premium Highway
Install Cost (USD)	$300-1,500	$1K-10K	$30K-150K	$100K-500K
Install Cost (INR)	₹25K-1.2L	₹80K-8L	₹25L-1.2Cr	₹80L-4Cr
Cost/kWh	Lowest	Low	Medium	Higher
Connector	Type 1/2	Type 2 / J1772	CCS / CHAdeMO	CCS2 / NACS
Grid Impact	Minimal	Low	Significant	Very High
Efficiency	85-90%	90-95%	90-93%	90-95%

⏱️ Time Analysis

Charging Time by Battery Size

How long it takes to charge different vehicle types at each power level — the real-world numbers that matter

Charge Time HeatmapFrom a 30 kWh scooter to a 100 kWh truck — see exactly how long each takes at every charging speed.

Battery Size	Level 1 (3kW)	Level 2 (7kW)	AC Fast (22kW)	DC Fast (50kW)	DC Ultra (150kW)	DC Mega (350kW)
30 kWh (2-Wheeler)	10 hrs	4.3 hrs	1.4 hrs	36 min	12 min	5 min
40 kWh (Small Car)	13.3 hrs	5.7 hrs	1.8 hrs	48 min	16 min	7 min
60 kWh (Mid Car)	20 hrs	8.6 hrs	2.7 hrs	72 min	24 min	10 min
80 kWh (Large SUV)	26.7 hrs	11.4 hrs	3.6 hrs	96 min	32 min	14 min
100 kWh (Truck)	33.3 hrs	14.3 hrs	4.5 hrs	120 min	40 min	17 min

⏱️ Charge Time Comparison (60 kWh Battery)

💰 Installation Cost Comparison (USD)

🔌 Global Standards

Connector Standards Worldwide

The physical interface between charger and vehicle — different regions adopted different standards, creating a fragmented global landscape

The Connector FamilyFrom Type 1 to Tesla NACS — each standard was born from different regional needs and automotive industry alliances.

Type 1 AC

Full Name: J1772 / SAE

Region: North America, Japan

Max Power: 7.4 kW (single phase)

Status: Widely deployed, legacy

Type 2 AC

Full Name: Mennekes

Region: Europe, India

Max Power: 22 kW (3-phase), 43 kW max

Status: EU standard, growing in India

CCS1 DC+AC

Full Name: Combo 1

Region: North America

Max Power: Up to 350 kW

Status: Dominant in North America

CCS2 DC+AC

Full Name: Combo 2

Region: Europe, India

Max Power: Up to 350 kW

Status: Becoming global standard

CHAdeMO DC

Full Name: CHAdeMO

Region: Japan (Declining)

Max Power: Up to 400 kW (ChaoJi)

Status: Legacy, being phased out

GB/T DC+AC

Full Name: Guobiao / China Standard

Region: China

Max Power: 250 kW (900 kW ChaoJi)

Status: China national standard

Tesla NACS DC+AC

Full Name: SAE J3400

Region: North America (Expanding)

Max Power: 250 kW (V4: 350 kW+)

Status: Becoming N. American standard

Bharat AC-001 AC

Full Name: IS 17017

Region: India Only

Max Power: 3.3 kW

Status: Low-power 2W/3W standard

Bharat DC-001 DC

Full Name: IS 17017 DC

Region: India Only

Max Power: 15 kW

Status: For 2W/3W fast charging

Global Connector LandscapeDifferent regions adopted different standards based on their automotive industry alliances and grid infrastructure. The world is slowly converging toward CCS as the universal standard.

🇮🇳 India Focus

Connector Standards in India

India uses a mix of global and indigenous standards — creating both flexibility and interoperability challenges

India's Connector Fragmentation

India's EV market is unique because it serves vehicles from 2-wheelers to buses — each requiring different connector types. The result is a fragmented landscape with 6 different connector standards in use simultaneously.

Type 2 (AC) dominates at 45% due to its adoption by most 4-wheeler EVs. CCS2 (DC) is growing rapidly at 25% as DC fast charging expands on highways.

India-specific standards Bharat AC-001 and Bharat DC-001 serve the massive 2W/3W market but are incompatible with global standards, creating challenges for imported vehicles.

Type 2: 45% — Most 4W EVs (Tata, MG, Hyundai)
CCS2: 25% — DC fast charging (growing rapidly)
CHAdeMO: 10% — Legacy (Nissan Leaf imports)
GB/T: 8% — Chinese EVs (BYD imports)
Bharat AC-001: 7% — 2W/3W (India specific)
Bharat DC-001: 5% — 2W/3W fast (India specific)

🇮🇳 India Connector Market Share

Standard	Used For	Share	Compatible?
Type 2	Cars	45%	Mostly ✅
CCS2	Cars/SUVs	25%	Limited ⚠️
CHAdeMO	Older EVs	10%	No ❌
GB/T	Chinese EVs	8%	No ❌
Bharat AC	2W/3W	7%	India only 🇮🇳
Bharat DC	2W/3W	5%	India only 🇮🇳

📅 Evolution

Charging Standards Timeline

How we got here and where we're going — the evolution of EV charging standards from fragmentation to convergence

2010

Type 1 (J1772) established as first standard in North America and Japan. Basic AC charging only, 7.4 kW max.

2012

CHAdeMO launched by Japanese automakers — first DC fast charging standard. Type 2 (Mennekes) adopted in Europe.

2014

CCS1 & CCS2 introduced — combining AC + DC in one connector. Backed by US & European automakers.

2018

China GB/T becomes world's most deployed standard. Tesla Supercharger network reaches global scale with proprietary connector.

2022

India's Bharat AC-001 & DC-001 standards published by BIS. India adopts CCS2 for 4-wheeler DC fast charging.

2024

Tesla NACS becomes SAE J3400 standard. Ford, GM, Rivian adopt it. NACS begins replacing CCS1 in North America.

2027 →

India mandates CCS2 for all new 4-wheelers. ChaoJi (900kW) standard planned for China. Global convergence toward 2-3 standards.

The Future: Universal StandardBy 2030, the world will likely converge on 2-3 standards: CCS2 (Europe/India/ROW), NACS (North America), and GB/T/ChaoJi (China). India is expected to mandate CCS2 for all new 4-wheelers by 2027.