AC Board - Polyphase Backup Board
SKU: ACB-PB
The ACBoard Polyphase Backup Board is a compact, pre-wired solution custom-built for 3-phase sites utilizing single-phase SolarEdge inverters and batteries. When a grid outage occurs, this board intelligently combines all three phases into one, allowing a single-phase system to seamlessly feed loads across the original three phases. Once grid power returns, the board automatically un-combines the phases before reconnecting them to the grid as a standard 3-phase configuration. Equipped with a physical mechanical interlock to prevent catastrophic phase faults, it features adjustable time delays and a highly spacious interior that simplifies field wiring.
Key Features AC Board - Polyphase Backup Board:
Phase Combining Technology: Links all 3 phases into a single-phase pool during off-grid operation to feed loads across the entire property.
Safe Grid Reconnection: Automatically un-combines the phases and restores the standard 3-phase grid link.
Mechanical Interlock Safety: Features a built-in physical interlock to eliminate the risk of short circuits and phase faults.
Customizable Time Delays: Includes adjustable control relays to precisely sequence the crossover and backup transitions.
Installer-Friendly Chassis: Compact profile packed with plenty of internal wiring space and utilizing premium-tier switchgear.
High-Capacity Throughput: Main busbars and internal circuit protection are rated up to 63A per phase.
AC Board - Polyphase Backup Board Basic Specs:
Maximum Current Rating: 63 A per phase
Phase Configuration: 3-Phase Connection / Single-Phase Inverters
Supported Load Type: Single-phase loads only
Safety Mechanism: Mechanical interlock and adjustable timing relays
Dimensions (W x H x D): 290 x 390 x 140 mm
Compatibility: Optimized for SolarEdge backup architectures
What’s Included:
1 x Pre-wired ACBoard Polyphase Backup Switchboard Assembly
Integrated mechanical interlock and high-quality switchgear
Adjustable timing control relays
Factory wiring diagram and schematics
Why Choose AC Solar Warehouse?
AC Solar Warehouse is the leading technical wholesaler and pioneer of pre-wired balance-of-system solutions across Australia and New Zealand. We support contractors with dedicated solar engineering support, local stock availability, and fully factory-tested hardware. By using our specialized pre-assembled boards, you minimize on-site installation errors, save time on complex wiring, and deliver a reliable, compliant energy storage layout.