The answer to 'how to fix EV charger installation' is to first identify the issue with the charger. This may involve checking the circuit breaker, inspecting the wiring for any damage, and ensuring the charger is properly grounded. If the issue persists, you may need to consult with a licensed electrician to diagnose and repair the problem.
It's important to note that working with electrical systems can be dangerous, and it's generally recommended to have a professional handle any major repairs or installations. DIY attempts may result in further damage or even personal injury. If you're not comfortable troubleshooting the issue yourself, it's best to call in a qualified electrician to ensure the job is done safely and correctly.