Gridboss BSB 70A AC Circuit Breaker for 18KPV, Flexboss18

BSB 70A AC Circuit Breaker — GridBOSS/18kPV/FlexBOSS18 AC Protection Breaker

Product Summary

The BSB 70A AC Circuit Breaker is a dedicated AC protection device designed for use with EG4 energy systems that require a 70-amp AC breaker, most commonly when integrating an EG4 18kPV Hybrid Inverter or an EG4 FlexBOSS18 Hybrid Inverter into a GridBOSS or service-entrance configuration. This breaker provides robust overcurrent and short-circuit protection for the inverter’s AC output feed to your main panel or load distribution, helping safeguard your inverter and wiring under fault conditions.

Key Features

• Rated Current: 70 amps — sized to match the AC output capacity of the 18kPV or FlexBOSS18 inverter where a 70A breaker is specified.

• Rated Voltage: 120/240 VAC split-phase applications.

• High Interrupting Capacity: Typically capable of interrupting up to 10,000 A of fault current, improving electrical safety on the AC side of the system.

• Trip-Free Design: Automatically trips under overload or short conditions even if the handle is held in the “on” position, reducing risk of damage.

• Wide Operating Temperature Range: Engineered to perform reliably in harsh environmental conditions, often from −40 °C to +85 °C.

• Standards Compliance: Meets UL489 and IEC60947-2 safety standards for AC circuit protection.

Typical Use Cases

• GridBOSS Hybrid Port Protection: Required breaker size for the AC feed from an EG4 18kPV or FlexBOSS18 into the hybrid port of a GridBOSS MID or similar distribution panel.

• Inverter AC Output Protection: Protects the AC wiring and inverter output circuits common in whole-home backup or hybrid solar setups.

• Service Entrance Integration: Suitable where the inverter output is tied into a larger service panel through proper breaker coordination.