Power optimizer Tigo TS4-A-O. 

• Simple, fast installation – snap to a standard PV module frame or mount to racking
• Intelligent optimization – optimizes only when needed
• Module-level monitoring – full visibility into module- and system-level production
• Rapid shutdown – a UL/NEC-certified component for photovoltaic rapid shutdown systems (PVRSS) worldwide
• Works with any system – fully compatible with 
• thousands of different inverter models from more than 50 inverter brands
• 25-year warranty
• Monitoring, rapid shutdown, and remote troubleshooting with TAP and CCA