The EcoFlow PowerOcean Battery Junction Box and Floor Base is a genuine EcoFlow accessory set for three-phase PowerOcean hybrid inverter installations. Unlike the single-phase PowerOcean and Ocean 2 ranges, which stack batteries directly onto the inverter, the three-phase PowerOcean system uses a modular, separated design, where the battery junction box provides the electrical connection point between the inverter and the battery stack.
The floor base secures the battery stack to the floor, while the junction box manages the battery-inverter connection control, including safe disconnect and reconnect. Together, they support a floor-standing stack of PowerOcean LFP battery modules for three-phase installations, up to a combined capacity of 20kWh (4 batteries).
3-Phase
System Compatibility
4
Max. Batteries Supported
20 kWh
Max. Stack Capacity
IP65
Battery Ingress Protection
Please Note: This junction box and floor base set is designed specifically for three-phase PowerOcean hybrid inverters. It is a different product from the junction box and floor base used with PowerOcean Plus (3ph) or Ocean 2 systems, which support different battery quantities — check compatibility carefully before ordering.
Key Features
Purpose-Built for 3ph PowerOcean
Designed to be installed with PowerOcean three-phase hybrid inverters, providing the correct electrical and mechanical interface for this modular system architecture.
Battery-Inverter Connection Control
The junction box manages safe disconnect and reconnect of the battery stack from the inverter, supporting safe maintenance and servicing.
Supports Up to 20kWh
The base and junction box combination can stack a maximum of 4 battery modules, giving a total capacity of up to 20kWh.
LFP Battery Safety Technology
Compatible with PowerOcean's LFP battery modules, which include a built-in fire prevention module as part of a layered safety design.
IP65-Rated System Design
Works with the IP65-rated PowerOcean battery enclosure, supporting robust indoor or outdoor installation.
Secure Floor-Standing Fixing
The floor base is bolted directly to the floor, providing a stable, level foundation for the full battery stack and junction box assembly.
Technical Specifications
General
Product Type
Battery Junction Box & Floor Base (Floor Stand)
Compatible System
EcoFlow PowerOcean Three-Phase Hybrid Inverter
Compatible Battery
EcoFlow PowerOcean LFP Battery (EF BD-5.1-S1)
Capacity
Maximum Battery Modules
4
Maximum Stack Capacity
20 kWh (4 × 5.12kWh nominal)
Installation
Mounting Method
Floor standing, fixed with expansion bolts
Fixing Hardware
M6×60 expansion bolts (supplied with battery)
Minimum Side Clearance
300 mm either side of the stack
Cascading Clearance
400 mm minimum between adjacent battery stacks (4+ battery packs)
Related Battery Module
Nominal Capacity (per module)
5.12 kWh
Cell Chemistry
LiFePO4 (LFP)
Important Safety Information: All electrical connections to the junction box must be carried out by a professionally trained and certified electrician. Before installation, ensure the click-on terminals on the junction box and battery are free of foreign objects or liquid, and that the floor meets the load-bearing requirements for a fully-loaded stack.
Frequently Asked Questions
Why does the three-phase PowerOcean system need a junction box?
The three-phase PowerOcean system uses a modular, separated design, where the inverter and battery stack are connected via a junction box rather than stacking directly together as in the single-phase and Ocean 2 ranges.
How many batteries can this base and junction box support?
The three-phase PowerOcean base and junction box combination supports a maximum of 4 battery modules, for a total stack capacity of up to 20kWh.
Is this the same accessory used with PowerOcean Plus or Ocean 2?
No. This specific junction box and floor base is designed for the original PowerOcean three-phase system. PowerOcean Plus (3ph) and Ocean 2 systems use a separate junction box and floor base rated for different battery quantities.
What does the junction box do during battery maintenance?
The junction box provides battery-inverter connection control, allowing the battery stack to be safely disconnected and reconnected, for example during servicing or maintenance.
Does this need professional installation?
Yes. All electrical connections must be made by a professionally trained and certified electrician, and the floor must be assessed for adequate load-bearing capacity before installation.
