EV Charger Troubleshooting & Tesla Diagnostic in Greer, SC

Touchstone Electric’s Greenville team visited a home in Greer, SC to diagnose a Level 2 charging issue impacting a Tesla. The customer, Morgan Moxie, reported the vehicle was only receiving 16 amps instead of the expected 48 amps from a ChargePoint home charger. Our technician, Tyler Harris, completed a thorough diagnostic to pinpoint the cause and provide clear next steps.

What We Found During the Diagnostic

We performed an on-site evaluation focused on power delivery, connections, and configuration. Key findings included:

Correct power at the breaker: The circuit breaker was delivering proper voltage without evidence of nuisance tripping or undervoltage.
Secure, properly energized connections at the wall charger: Terminal connections inside the charger enclosure tested within expected ranges.
ChargePoint app configured to 48A: The customer’s app settings were already set to allow the maximum supported output.
Tesla limited to 16A during charging: Despite correct supply power and settings, the vehicle received only 16 amps.

Based on these results, our professional opinion is that the ChargePoint unit is likely faulty. We recommended replacement by the original installer or manufacturer support to address the undercurrent condition.

Work Performed

Diagnostic (per hour): Inspecting, testing, and analyzing the EV charging system, including breaker output, charger terminations, and app configuration, to identify and troubleshoot the low-amperage issue.

Our Electrical Repairs & Troubleshooting visit focused on verifying each link in the charging chain to rule out supply and configuration faults before identifying the charger hardware as the probable issue.

Why a Level 2 Charger Might Be Stuck at 16A

If your Tesla or other EV isn’t drawing its full rated current, common culprits include:

Charger hardware fault: Internal sensor or relay issues can throttle current, even when supply power is correct.
Incorrect configuration: App or dip-switch settings may cap output; always verify max amperage is set appropriately for the circuit.
Thermal derating: Overheating within the unit or plug can cause the charger to reduce current for safety.
Circuit limitations: Undersized circuits or voltage drop can limit performance, though this was not the case here.

Correct diagnosis prevents unnecessary panel work and leads straight to the true fix—often a charger replacement or manufacturer-supported repair.

Recommended Next Steps for This Greer Home

Contact the original installer or ChargePoint support to replace the suspected faulty unit.
After replacement, verify 48A output and confirm the Tesla draws expected current during a monitored charging session.
Schedule a follow-up test with Touchstone Electric to validate performance and ensure safe, code-compliant operation.

Local Service You Can Trust

This job was completed by Tyler Harris from our Greenville team serving the Taylors and Greer, SC area. We specialize in Electrical Repairs & Troubleshooting for EV chargers, Tesla home charging setups, and Level 2 installations across the Upstate.

Completion date: November 30, 2025

Customer Feedback

We’re proud to share that Morgan Moxie praised our service with a Google review. Read or share the feedback here: Google review link.

Need EV Charger Help in Greer, SC?

If your Tesla or Level 2 charger won’t deliver full amperage, our Greenville team can help. From diagnostics to safe replacements and verification testing, Touchstone Electric delivers clear answers and reliable fixes for homeowners in Greer, SC.