EcoFlow Accessory

EcoFlow Battery Stack Bridge

Official bracket set for dual-tower EcoFlow battery systems: rigidly ties two adjacent battery towers together for mechanical stability, compatible with OCEAN 2 5 kWh / 8 kWh packs and the gen-1 PowerOcean pack.

Ties two adjacent battery towers into one rigid assembly
Compatible with EF BD-5-S2, EF BD-8-S2 and gen-1 EF BD-5.1-S1 packs
EcoFlow recommends bracing both sides of every battery unit (12 brackets for 6+6 towers)

Manufacturer: EcoFlow
Model code: Battery Stack Bridge
Item no.: DLK-ECOFLOW-STACK-BRIDGE
Delivery: Delivery included in your Proforma

Orderable · lead time confirmed after order

Plan with Battery Stack Bridge

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Trade price

Figures transcribed from the manufacturer datasheet on file. Confirm your grid code and configuration with our engineers before ordering.

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Engineering-checked configurations

System logic

Battery Stack Bridge, specified from the datasheet.

Every value on this page is transcribed from the manufacturer documentation on file.

Ties two adjacent battery towers into one rigid assembly

Compatible with EF BD-5-S2, EF BD-8-S2 and gen-1 EF BD-5.1-S1 packs

EcoFlow recommends bracing both sides of every battery unit (12 brackets for 6+6 towers)

In pictures

Inspect it before you spec it.

Official renders, installation photos and system panels for this model line.

Product
Official manufacturer product render

Documentation

Specifications

Every value exactly as published in the official Battery Stack Bridge documentation.

Compatible batteriesEcoFlow PowerOcean LFP Battery (EF BD-5.1-S1)OCEAN 2 LFP Battery 5 kWh (EF BD-5-S2) · OCEAN 2 LFP Battery 8 kWh (EF BD-8-S2) — bridged units must be identical models

Base spacingOCEAN 2 bases: 94.6–104.5 mm between towersPowerOcean bases: 95.4–105.4 mm

Recommended quantitySecure both sides of each battery unit in both towers — e.g. 12 brackets for two 6-module towersadd seismic restraint in seismic zones

ApplicationMechanical bracing between two adjacent battery towers

Battery matchingBoth bridged towers must use the identical battery model

Compatible battery 1OCEAN 2 LFP Battery 5 kWh (EF BD-5-S2)

Compatible battery 2OCEAN 2 LFP Battery 8 kWh (EF BD-8-S2)

Compatible battery 3PowerOcean LFP Battery (EF BD-5.1-S1)

OCEAN 2 base spacing94.6–104.5 mm

PowerOcean base spacing95.4–105.4 mm

Bracket placementEcoFlow recommends securing both sides of every battery unit

Two 6-module towers12 bridge brackets

Seismic zonesAdditional suitable seismic restraint required

Full datasheet (PDF) Ask an engineer

Product

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EcoFlow OCEAN 2 (Accessories) family. Same engineering, different size.

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3 ratings Same series, same engineering — your model is highlighted.

EcoFlow OCEAN 2 Battery 5.02 kWh (EF BD-5-S2) Sign in for pricing

EcoFlow OCEAN 2 Battery 8.0 kWh (EF BD-8-S2) Sign in for pricing

EcoFlow OCEAN 2 HD-P3-10K0-S2 (10 kW three-phase hybrid, 2026 flagship) Sign in for pricing

Ingress protection

IP66

—

IP66

Operating temperature

-20 to 55 °C

—

-20℃~60℃ (>40℃ derating) °C

Weight

46 kg

—

Approx. 36.5 kg

Dimensions

680×196×279 mm

—

680×203×406.5 (W×D×H) mm

Every figure comes straight from the manufacturer's official datasheet.

Configuration 3

It is required only for dual-tower systems, where two battery stacks stand side by side as a parallel pair. A single tower does not use it.

Dual-tower floor installs: EcoFlow recommends tying the towers together with these brackets, securing both sides of each battery unit in both towers.
Single tower: one floor-standing stack of up to 6 modules stands on its own base with no bridge.
Wall mounts: wall-mounted stacks are limited to 3 modules and use the wall-mount hardware instead, so the bridge does not apply.
Seismic zones: EcoFlow calls for additional seismic restraint on top of the bridge brackets.

The bridge covers EcoFlow's stackable LFP batteries, and EcoFlow mandates identical models on both sides of a bridge.

Compatible batteries: PowerOcean LFP Battery (EF BD-5.1-S1), OCEAN 2 LFP Battery 5 kWh (EF BD-5-S2) and OCEAN 2 LFP Battery 8 kWh (EF BD-8-S2).
No mixed pairs: a 5 kWh tower cannot be bridged to an 8 kWh tower; plan both towers around the same module type before quoting.
Tower height: a floor-standing tower carries up to 6 modules on its base, so a bridged pair tops out at 2 x 6 modules.

Count on securing both sides of each battery unit in both towers, which is EcoFlow's stated rule for parallel stacks.

Worked example: EcoFlow's guide puts two 6-module towers at 12 brackets.
Shorter towers: the same both-sides rule applies; state the module count of each tower in the enquiry and the bracket count is confirmed on the quote.
Seismic zones: budget for additional seismic restraint beyond the brackets themselves.

Installation & wiring 1

The bridge fixes the gap between the two battery bases, and the base hardware handles the levelling.

OCEAN 2 bases: 94.6 to 104.5 mm between the two towers.
PowerOcean bases: 95.4 to 105.4 mm.
Levelling: the OCEAN 2 battery base has adjustable feet and a built-in spirit level; level both towers before fitting the brackets.
Stacking: per EcoFlow's documentation the modules stack wire-free on the base's click-on terminal.
Safety scope: per EcoFlow's installation guide the brackets are fitted by a certified electrician with the system de-energized, and the bracket structure must not be altered.

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