- Replace 200Amp Meter/Main Breaker Combo Panel - Replace Main Grounding System - Replace 200Amp Main Lug Panel in the Garage - Install 6 - Customer Supplied Smoke Detectors - Permits (Application,NOC, Service Drawings,Smoke Detector Drawings) - Install Panel Surge Protection - Install A/C Surge Protection - Install 2 - New Circuits for the Existing Tankless Water Heater Unit.