© copyright all right reserved 2025 EV Parts India Design & Developed By 
Choosing the right EV charger can feel overwhelming when you’re faced with technical specifications like “32A,” “7.4kW,” or “240V AC.” Whether you’re a first-time EV owner setting up home charging or a fleet manager evaluating commercial options, understanding these numbers is crucial for making informed decisions about charging speed, safety, and cost-effectiveness.
At EV Parts India, we’ve helped many customers navigate EV charger specifications to find the perfect charging solution. This comprehensive guide will demystify the technical jargon and help you confidently choose an EV charger that matches your vehicle’s needs and charging requirements.
EV charger specifications are the technical parameters that define how much electrical power a charger can deliver to your electric vehicle. The three fundamental specifications you’ll encounter are:
Voltage (V): The electrical pressure that pushes current through the charging cable. Think of it like water pressure in a pipe.
Amperage (A): The amount of electrical current flowing through the charger. This is like the volume of water flowing through that pipe.
Power Output (kW): The total electrical power delivered to your EV, calculated by multiplying voltage and amperage (V × A = Watts).
When reading EV charger specifications, you’ll often see both input and output ratings:
Understanding this distinction helps ensure your electrical infrastructure can support the charger while knowing exactly what charging performance to expect.
EV charger amperage directly determines how fast your vehicle charges. Higher amperage means more electrical current flows to your EV’s battery, resulting in faster charging times.
The relationship is straightforward: double the amperage, and you roughly double the charging speed (assuming voltage remains constant). Here’s how different amperage levels impact your charging experience:
10A Chargers: Suitable for overnight charging of smaller EVs or plug-in hybrids. Provides slow but steady charging that’s gentle on your home’s electrical system.
16A Chargers: The most common choice for EV home charger installations. Offers a good balance between charging speed and electrical load.
32A Chargers: Ideal for larger EVs or when you need faster charging. Requires dedicated electrical circuits but significantly reduces charging time.
63A+ Chargers: Commercial-grade solutions for fleet applications or public charging stations where rapid turnaround is essential.
Before installing a higher amperage charger, verify your home’s electrical panel can handle the additional load. Most Indian homes have 32A or 63A main connections, which affects the maximum EV charger amperage you can safely install.
EV charging voltage levels determine the charger type and compatibility with your vehicle and electrical infrastructure.
230V Single-Phase: Standard household voltage in India, used for most residential Level 1 vs Level 2 charger installations.
400V Three-Phase: Commercial and industrial voltage level, enabling higher power output for faster charging.
800V DC: Advanced fast-charging systems found in premium EVs and commercial charging networks.
The voltage level directly correlates with charger categories:
Level 1 Chargers (230V AC): Basic charging using standard household outlets. Slowest charging option, but requires no special installation.
Level 2 Chargers (230V/400V AC): Most popular choice for home and workplace charging. Requires a dedicated electrical installation but offers reasonable charging speeds.
DC Fast Chargers (400V+ DC): Commercial charging solutions that bypass your EV’s onboard charger for rapid charging.
EV charger power output is the most important specification for determining charging time. Measured in kilowatts (kW), it represents the total electrical power delivered to your EV.
Power Output (kW) = Voltage (V) × Amperage (A) ÷ 1000
This simple formula helps you understand the relationship between all three specifications.
Voltage (V) | Amperage (A) | Power Output (kW) | Charging Speed Estimate* |
230V | 10A | 2.3kW | 8-12 hours (full charge) |
230V | 16A | 3.7kW | 6-8 hours (full charge) |
230V | 32A | 7.4kW | 3-4 hours (full charge) |
400V | 16A | 6.4kW | 4-5 hours (full charge) |
400V | 32A | 12.8kW | 2-3 hours (full charge) |
400V | 63A | 25.2kW | 1-2 hours (full charge) |
*Estimates based on 40kWh battery capacity. Actual charging times vary by vehicle and battery condition.
Your EV’s onboard charger capacity ultimately limits charging speed. A 22kW charger won’t charge faster than your vehicle’s maximum acceptance rate, typically 3.3kW to 11kW for most EVs in India.
Understanding AC vs DC EV charging helps you choose the right charger type for your application.
How they work: AC chargers supply alternating current to your EV, which then converts it to DC power using the vehicle’s onboard charger.
Advantages:
Limitations:
How they work: DC chargers convert AC power to DC externally and supply direct current to your EV’s battery, bypassing the onboard charger.
Advantages:
Limitations:
Selecting the perfect EV charger requires understanding your vehicle’s specifications and charging requirements.
Check your vehicle’s manual or specifications to find the maximum AC charging rate. Common capacities include:
Ensure EV charger compatibility by verifying your vehicle’s charging port type:
Daily commuting: A 3.7kW to 7.4kW EV home charger typically suffices for overnight charging.
Frequent long trips: Consider higher power output or access to DC fast charging.
Fleet operations: Commercial-grade chargers with load management capabilities.
Ready to find the perfect charger for your EV? Explore our comprehensive collection of EV chargers at EV Parts India, featuring options for every vehicle type and charging requirement.
Use this checklist when evaluating EV charger specifications:
Power Requirements:
Vehicle Compatibility:
Installation Considerations:
Safety and Certification:
Smart Features:
Budget and Total Cost:
For most Indian homes, 16A to 32A provides the best balance of charging speed and electrical safety. A 16A charger (3.7kW) works well for overnight charging, while a 32A (7.4kW) charger offers faster charging for larger batteries or limited charging windows.
Yes, using a higher amperage EV charger is safe. Your vehicle will only draw the current it can accept, determined by its onboard charger capacity. However, you won’t get faster charging beyond your EV’s maximum rate, so there’s no benefit to significantly oversizing your charger.
Not necessarily. While higher voltage enables higher power output, it also requires compatible electrical infrastructure. 230V single-phase works fine for most residential applications, while 400V three-phase is beneficial only if you need power output above 7.4kW and have the electrical supply to support it.
Charging Time = Battery Capacity (kWh) ÷ Charger Power Output (kW) × Charging Efficiency Factor (0.85-0.95)
For example, charging a 40kWh battery with a 7.4kW charger: 40 ÷ 7.4 × 0.9 = approximately 4.9 hours for a full charge.
EV charger power output doesn’t directly affect your electricity costs – you pay for the total energy consumed (kWh), not the charging speed. However, faster chargers may enable you to take advantage of time-of-use electricity rates by charging during off-peak hours.
Understanding EV charger specifications empowers you to make informed decisions about your charging infrastructure. The key is matching the charger’s voltage, amperage, and power output to your vehicle’s capabilities and your charging requirements.
Remember that the most expensive or highest-powered charger isn’t always the best choice. Consider your daily driving patterns, available electrical infrastructure, and budget to find the optimal solution.
Whether you need a simple EV home charger solution or a complex commercial charging setup, the right specifications ensure safe, efficient, and cost-effective charging for years to come.
Ready to upgrade your EV charging experience? Explore our expertly curated selection of EV chargers at EV Parts India, or speak with our technical specialists who can guide you through the specification maze and recommend the perfect charger for your needs. Contact us today – we’re here to power your electric journey!
FIRST FLOOR, 73/1119, CHITTOOR ROAD, Kochi Ernakulam KERALA 682012
info@evpartsindia.com
77 898 77 894
© copyright all right reserved 2024 EV Parts India Design & Developed By