Fronius EBLU Essential Backup Load Unit 4,240,052

The Fronius Essential Backup Load Unit 4240052 is a microgrid interconnect device designed to provide automatic backup functionality for essential electrical loads. It provides the interface needed to support reliable backup operation while maintaining compatibility with common North American residential electrical configurations.

Designed for both indoor and outdoor installation, the Essential Backup Load Unit features a rugged Type 4X enclosure and supports split-phase 120/240V as well as WYE 120/208V and WYE 127/220V network structures.

The unit supports nominal AC voltages from 208V to 240V, delivers nominal input/output power up to 12,000W at 240V, and accommodates up to 50A maximum continuous input/output current. Its integrated protection devices and GPIO interface provide a purpose-built solution for Fronius backup and microgrid applications.

Key Technology

• Automatic Essential Backup
  Designed to enable automatic backup operation for essential electrical loads when used as part of a compatible Fronius energy system.

• Microgrid Interconnect Device
  Provides the electrical interconnection functionality required for supported Fronius microgrid and backup configurations.

• 208V–240V AC Compatibility
  Supports nominal AC voltages from 208V to 240V, with an operating voltage range of 183V to 264V.

• Up to 12kW Nominal Power
  Rated for 10,400W at 208V, 11,000W at 220V, and 12,000W at 240V.

• 50A Continuous Current Capacity
  Supports up to 50A maximum continuous input/output current at nominal voltage.

• Multiple Network Structures
  Compatible with split-phase 120/240V, WYE 120/208V, and WYE 127/220V electrical configurations.

• Integrated Electrical Protection
  Includes internal overcurrent protection devices for control, transformer, and sub-system circuits.

• Indoor & Outdoor Installation
  Features a durable Type 4X enclosure suitable for indoor or outdoor installations.

• Wide Environmental Operating Range
  Designed for ambient temperatures from -13°F to 113°F (-25°C to 45°C) and relative humidity from 0% to 100%, including condensation.

• 10-Year Warranty
  Backed by a 10-year manufacturer warranty.

Best Uses

• Essential Load Backup Systems
  Ideal for installations requiring automatic backup of selected critical or essential household loads.

• Fronius Solar + Backup Installations
  Designed to integrate into compatible Fronius energy systems requiring microgrid interconnection functionality.

• Residential Backup Power
  Supports common North American split-phase and WYE electrical configurations for flexible system design.

• Indoor or Outdoor Equipment Installations
  The Type 4X enclosure provides installation flexibility for protected indoor spaces or exposed outdoor locations.

Product Specifications

Reliable Essential Backup and Microgrid Integration

The Fronius Essential Backup Load Unit 4240052 combines automatic essential-load backup functionality, robust electrical protection, flexible voltage compatibility, and a durable outdoor-ready enclosure. With support for up to 12kW nominal input/output power at 240V and 50A continuous current, it provides a purpose-built interconnection solution for compatible Fronius backup energy systems.

Why Buy From US Solar Supplier

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Our inventory is updated daily with the latest solar technologies, and our experienced team is ready to assist with product selection, system design, and installation guidance.

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