Hard Lessons From Real EV Charger Installs

Every installer gets a curriculum of hard lessons. The good ones learn from each mistake, build it into their process, and never repeat it. Here are mine — the callbacks, the re-pulls, and the conversations I had to have with customers I'd rather have kept delighted.

Lesson 1: GFCI Is Not Optional

Early in my career I installed a hardwired Level 2 charger in a carport without a GFCI breaker because the homeowner had pushed back on the additional cost. The AHJ caught it at inspection and I paid for the correction myself. GFCI protection in garages, carports, and outdoor EV charging locations is an NEC requirement, not an upsell. The conversation to have with the customer is why it matters — not whether to include it.

Lesson 2: Conduit Fill Matters More Than You Think

A 60-amp circuit for a 48-amp charger requires #6 AWG conductors. Running those through a ¾" conduit that already has other wires in it may exceed NEC fill limits, which affects derating and inspection outcomes. I've seen installers pull the right wire through the wrong conduit and create a fail at inspection that required pulling everything out and starting the run over. Check conduit fill before you pull — the math takes two minutes.

Lesson 3: Permit After the Fact Is Always More Expensive

A customer called me to inspect and permit an EVSE a previous installer had put in without pulling a permit. The work was partially incorrect — the connections weren't properly torqued and the equipment wasn't wet-location rated for its outdoor mounting location. Retroactive permits require a full inspection of existing work, and non-compliant work gets red-tagged. The customer paid twice: once for the original install and once for the corrections. Always pull the permit first.

Lesson 4: Torque Specs Exist for a Reason

A loose connection on a high-current circuit generates heat. Heat causes insulation degradation. Degraded insulation causes failures that range from nuisance tripping to actual fire risk. Every terminal on a 60-amp EV circuit — the breaker, the EVSE lugs, and any junction — should be torqued to spec with a calibrated tool. This is not a practice that slows you down; it's what keeps you from returning to a job you thought was done.

Lesson 5: Document Everything Before You Leave

Photos of the completed panel work, the conduit run, the EVSE mounting, and the breaker label take five minutes. Months later when a customer calls with a question, when a permit inspector needs documentation, or when you need evidence of your workmanship, those photos are worth far more than the five minutes they cost. I photograph every install — before energizing, after energizing, and the final mounted charger. It is now a non-negotiable part of my workflow.