Fire Protection Inverter FoxESS S-BOX PLUS (4 strings)

S-BOX Plus is a fire protection device powered by a DC current disconnect switch designed to secure photovoltaic installations. The device supports 4 PV strings with a string voltage range of 300–1500 Vdc and a maximum current per string of 25 A (total up to 100 A), has an IP66 protection class, and is intended for residential and commercial applications.

The manufacturer of the device is FoxESS, a company specializing in solutions for photovoltaic systems. FoxESS provides products that comply with international standards and certifications, offering solutions with an emphasis on safety (including automatic shutdown in case of overheating) and ease of installation and integration with PV systems.

Electrical Parameters

• String Voltage (Vdc): 300 ~ 1500 Vdc
• Current per String (A): 25 / 25 / 25 / 25
• Number of Strings: 4
• Switch Wiring: 8
• Operating Voltage Range (Vac): 100 ~ 270 Vac
• Nominal Voltage (Vac): 230 Vac
• Nominal Current (mA): 30 mA
• Inrush Current (mA): average 100 mA
• Tripping Current (mA): max. 300 mA
• Communication: RS485

Mechanical and Environmental Parameters

• Housing: PC+ABS, plastic
• Protection Class: IP66
• Protection Type: Class II
• Automatic Shutdown at: +70 °C
• Operating Temperature Range: -20 ~ +50 °C
• Maximum Operating Temperature before Automatic Shutdown: +70 °C
• Ambient Temperature Range (storage): -40 ~ +85 °C
• Additional Equipment: internal condensate drain valve
• Number of Operations: 10000
• Certificates and Compliance: CE, EN 60947-1 & 3