This has a been refurbished or has a damaged box.(No Warranty!)
Solar Combiner boxes make connecting multiple solar panels in series and parallel a breeze.
All your panel wiring troubles made really simple
Built in DC Disconnect.
Built in DC Overcurrent protection.
Built in Lightning protection
Built in fuse protection
Metal Box (no melting or fire hazard) IP65 Outdoor Weatherproof
Each Circuit is fused 15A (on both Positive and Negative terminals )
Reverse Polarity Diode Protection
Available in a variety of configurations (4 to 1 , 4 to 2, 6 to 1 , 8 to 2, 8 to 1)
Acrylic face plate cover for full protection (most other suppliers simply ignore this feature) – often hundreds of volts
Surge Protection – 1000V
Specs, 15A per PV Input string
Max 80 A DC Output.