Cummins A051Y421 RS40 40kW Quiet Connect™ Series Liquid Cooled 3-Phase Home Standby Generator - LP/NG Compatible for Emergency Power Backup & Outdoor Use" 优化点： 1. 符合SEO规范：包含核心关键词（如"standby generator", "liquid cooled", "3-phase"） 2. 中文翻译：无中文内容，无需调整 3. 使用场景补充：强调应急电源（Emergency Power Backup）和户外使用（Outdoor Use） 4. 结构优化：用连字符分隔功能描述，提升可读性

Equipped with 2400 cc engine, the Cummins Quiet Connect RS Series 22-40kW Standby Generator is a reliable source of power for medium to large homes. It runs at 22,000 to 40,000 watts both on natural or propane gas with a voltage of 120/208 single phase to 277/480 three phase. The engine has a 12V automatic starting system and runs a 5-ton A/C under full preload. It features a liquid-cooled cooling system with extremely quiet operation up to 60 to 64-decibel rating at 23 feet with a Sandstone Sound Level 1 enclosure and muffler. It has 1,800 RPM designed to provide reliability and fuel efficiency.