How to Choose an EV Charger: A Complete Buyer's Guide

Buying an EV is just the beginning — choosing the right charger is equally important. The wrong choice can mean slow charging, incompatibility, or a system that can't grow with your needs. This guide walks you through the key factors to consider.

1. Safety Certifications

Always choose a charger with CE marking and compliance with IEC 61851 standards. Look for built-in protections: earth leakage protection, overcurrent protection, and weatherproofing (IP rating) appropriate for outdoor use.

2. Charging Speed (Power Output)

Match the charger's output to your vehicle's onboard charger capacity. Most EVs accept up to 7.4kW (single-phase) or 11–22kW (three-phase). A 7.4kW charger will fully charge most EVs overnight — ideal for home use. Higher power makes sense for commercial settings with faster turnaround needs.

3. Smart vs Basic

If you're installing more than one charger, or charging in a shared space, choose a smart OCPP-compliant charger. This enables remote management, scheduling, load balancing, and accurate billing — all managed through a platform like Greems. Basic chargers simply can't support these use cases.

4. Connectivity

Smart chargers connect via WiFi, Ethernet, or cellular (4G/5G). For reliable operation with a management platform, ensure your installation location has stable network coverage. Greems supports all connectivity types and monitors connection health continuously.

5. Future-Proofing

Choose a charger from a manufacturer with a strong warranty, ongoing firmware support, and OCPP compliance. This ensures your charger remains compatible with evolving management platforms and grid regulations — protecting your investment long-term.

Not sure which charger is right for your situation? The Greems team provides free expert advice — get in touch today.