Do I Need a Panel Upgrade for an EV Charger? 100-Amp vs 200-Amp Service
A panel upgrade can be the most expensive part of going electric at home. Here's how to tell if you might need one, and the cheaper options to ask an electrician about.
As an Amazon Associate, EV Charging may earn from qualifying purchases. This helps support our independent guides at no extra cost to you. Learn more.
Key takeaways
- Many homes with 200-amp service can add a Level 2 charger without an upgrade.
- 100-amp homes may still fit a lower-amp charger or a load-management device.
- Only a load calculation by a licensed electrician gives a real answer.
What a load calculation does
The electrical code has a method for adding up your home's existing loads (heating, AC, range, dryer and so on) to see how much room is left on your service. An electrician uses this to decide what size EV circuit you can safely add.
Shop this guide
Compare current options and prices
Alternatives to a full upgrade
If space is tight, you might choose a 32-amp or 24-amp charger instead of 48 amps. Most drivers still recover their daily miles overnight at those speeds.
Some chargers and add-on devices offer load management, which lowers charging speed when the rest of the house is using a lot of power. Ask your electrician whether that is allowed and suitable for your home.
Check for rebates
Some utilities and states offer rebates for panel upgrades or charger installation. Check before you sign a quote.
Safety note: This article is general information, not professional electrical advice. Working with 240V circuits can cause serious injury or fire. Hire a licensed electrician and follow local codes and permit requirements.
Sources & further reading
Written by
LarryLeoLarryLeo started EV Charging while researching his own next car purchase. He digs into the pros, cons and real cost savings of going electric — using government, standards-body and manufacturer sources — and shares what he finds so other buyers can decide with confidence.
Why trust EV Charging Guide
Our guides are researched from government, standards-body and manufacturer sources, reviewed for accuracy, and updated when rules or products change. Brands cannot pay for placement. Read our editorial policy.
Related Posts
NEMA 14-50 vs Hardwired EV Charger: Which Installation Is Better?
40 Amp vs 48 Amp EV Charger: Is the Faster Charger Worth It?
