America's Favorite Transfer Switches and the industry's most VERSATILE transfer switches. Designed for backup generators ranging from 3,750 to 15,000 watts, our PowerStay generator transfer switch systems are available in 6, 8, 10 or 12-circuit configurations, are expandable in the field to up to 10 or 16 circuits, and are listed to UL standard 1008. Raintight configurations also available (not 2026 nor 3028). Since our systems are designed to use standard interchangeable type circuit breakers, they can be easily expanded or reconfigured after installation. Our systems also accommodate GFCI and Arc-fault circuit breakers required by the NEC in certain cases. Protected by US Patent 6,861,596 B2 and other patents pending.   These electric generator accessories help you connect your electric generator to your house and will isolate it from the power grid to prevent any dangerous back feed that could injure utility workers.  Call 1-800-421-3815 with any questions about accessories for your power generator.