Technology & How EV Chargers Work

Abner

December 14 , 2025

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What does EV charging mean?

EV charging refers to supplying electrical energy from the grid (AC or DC) to an electric vehicle battery. In most home and public chargers, the charger (EVSE) manages power delivery and safety, while the vehicle’s onboard charger converts AC power into DC for battery storage.

What are the benefits of a Level 2 EV charger?

Level 2 chargers operate on 240V and typically deliver 6–11.5 kW. Compared to Level 1 (120V), they charge 5–8× faster, support scheduled off-peak charging, improve daily convenience, and reduce reliance on public infrastructure.

Do EV chargers use linear or switching power supplies?

Modern EV chargers use switch-mode power supplies and solid-state control electronics. Linear supplies would be inefficient and impractical at EV power levels.

Do EV chargers use reverse pulse charging?

No. Reverse pulse charging is not used in modern EV charging. Battery health is managed by the vehicle’s Battery Management System (BMS), not by external pulse techniques.

How does an EV charger know which car to charge?

Through standardized pilot signal communication (SAE J1772 or IEC standards). The vehicle and charger negotiate current limits, grounding, and readiness before power is delivered.

Why does three-phase 400V × 32A equal 22 kW?

In three-phase systems, power is calculated as: P = √3 × Voltage × Current. Thus: √3 × 400V × 32A ≈ 22 kW. This is common in European commercial chargers.

What communication protocol does Tesla EV charging use?

Tesla uses PLC-based communication aligned with ISO 15118 and DIN 70121 standards, branded under the North American Charging Standard (NACS). This enables authentication, load sharing, and smart power management.

What is the circuit concept of a Level 1 EV charger?

A Level 1 charger uses a 120V supply, GFCI protection, pilot signal generator, relays, and safety interlocks. It does not directly control battery charging— it simply enables safe AC power delivery to the vehicle’s onboard charger.

Tesla Wall Connector – Level 2 Smart EV Charger (Up to 48A)

The Tesla Wall Connector is a high-performance Level 2 charger designed specifically for the Tesla ecosystem, combining speed, intelligence, and scalability.

Charging Speed: Up to 11.5 kW / 48A, delivering ~44 miles of range per hour.
Compatibility: Works with all Tesla models (Model S, 3, X, Y).
Adjustable Output: Configurable from 12A to 48A to match your electrical supply.
Wi-Fi Connected: OTA firmware updates and remote monitoring.
Power-Share: Link up to six Wall Connectors for load-balanced multi-EV charging.
Indoor / Outdoor Rated: Suitable for garages, driveways, and commercial sites.

👉 View Tesla Wall Connector on Amazon

Best for: Tesla owners seeking the fastest, cleanest, and most future-proof home charging solution with native load balancing.