We performed comprehensive preventative maintenance and diagnostic troubleshooting on a Generac standby generator for a residential property in Houston. Our team evaluated the unit's mechanical components and addressed a rotation warning displayed on the Evolution 2.0 control panel. We ensured all systems were functioning correctly to provide reliable backup power. Using a digital multimeter, we tested the lead-acid battery levels and verified the charging system performance. After completing a full maintenance reset, we updated the exercise schedule to ensure the unit stays operational. This routine service confirmed the system is ready to activate during the next power outage.