Finished installation of backup generator system for residential customer with medical equipment needs. Installed 14kW natural gas generator with automatic transfer switch. Connected essential circuits including refrigeration, heating, bedroom outlets, and medical equipment power. Added surge protection for sensitive electronics. Programmed weekly self-test routine during daytime hours. Provided customer training on manual operation procedures and maintenance requirements. System successfully tested through multiple simulated outages with transfer time under 15 seconds. Left comprehensive documentation package with warranty information and maintenance schedule.