Description
24 kWh energy capacity in a single lean vertical footprint.
EcoFlow OCEAN 2 Battery 8.0 kWh (EF BD-8-S2) is an 8.00 kWh high-density high-voltage LFP modular battery brick with an integrated 800 V DC-DC power stage, built-in aerosol fire suppression, and automated sub-zero self-heating, engineered to reach 24 kWh storage in a single compact vertical column.
8.00 kWh High-Capacity Single Brick
Packs 60% more energy per layer than standard 5 kWh modules, reaching 24.0 kWh in just 3 stacked bricks.
Integrated 800 V DC-DC Power Stage
Decentralized power regulation allows mixing 8 kWh and 5 kWh modules in the same system without capacity degradation.
Built-in Winter Self-Heating (-20 °C)
Internal thermal elements warm cells automatically before charging in unheated winter garages and outdoor alcoves.
Cable-Free Slide-and-Lock Interlocking
Internal self-aligning busbar terminals eliminate exposed high-voltage DC jumper cables and wiring errors during stacking.
More product details
Standard residential storage towers require 5 or 6 modules to reach 24 kWh, creating tall, heavy columns. The EF BD-8-S2 achieves 24 kWh with just 3 stacked bricks.
- Active bidirectional DC-DC converter regulates output voltage independently.
- Allows mixing 8 kWh and 5.02 kWh modules on the same OCEAN 2 inverter platform.
- Internal busbar contacts pass power and communication directly between stacked modules.
EcoFlow OCEAN 2 (LFP Battery)
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Certified outdoor reliability down to -20 °C with active fire suppression.
Charging lithium batteries in sub-zero winter temperatures causes irreversible lithium plating. The EF BD-8-S2 includes integrated PTC heating elements and thermal aerosol fire suppression. Auto-heating warms battery cells to optimal charging temperatures using solar or grid power. Thermal-activated aerosol module suppresses thermal runaway in milliseconds without water. Upgraded IP66 weatherproof casing certified for exposed outdoor wall installations (-20 to +50 °C).
Takes twelve modules on OCEAN 2 three-phase
OCEAN 2 Plus single-phase also takes twelve. OCEAN 2 single-phase and PowerOcean 1ph take six. PowerOcean 3ph takes nine.
Sits on the OCEAN 2 base
Dual towers use the Battery Stack Bridge. Base spacing is 94.6 to 104.5 mm. Identical models only.
Keeps the family cycle claim
OCEAN 2 LFP packs list 10000 cell cycles or more. Capacity-retention terms sit on EcoFlow's warranty page.
Technical data
Extreme volumetric energy density and decentralized DC-DC power regulation in an 8 kWh modular brick.
8.0 kWh high-density LFP brick delivering maximum capacity per vertical stack.
As the largest modular building block in the OCEAN 2 series, the EF BD-8-S2 delivers a massive 8.00 kWh of LFP storage in a single module. Stacking up to 3 units per column, it reaches 24.0 kWh in a single footprint, providing extreme energy density for large residential and light commercial solar-plus-storage systems.
- High-Density Brick
- 8.00 kWh
- Single-Column Max
- 24.0 kWh
- Sub-Zero Ready
- Auto-Heating
- External DC Conduits
- Zero
Battery: Model & Status
- Model
- EcoFlow OCEAN 2 LFP Battery 8 kWh (EF BD-8-S2), EcoFlow designation
- Cell chemistry
- LiFePO4 (LFP), per the product designation 'OCEAN 2 LFP Battery 8kWh'
- Nominal capacity
- 8 kWh per module (per EcoFlow's designationfull datasheet not yet published, detailed capacity/power figures on request)
Scaling & Compatibility
- Modules per stack
- Floor mounted: up to 6 per stackwall mounted: up to 3 (identical to the 5 kWh module)
- Modules per inverter
- Up to 12 on OCEAN 2 three-phase and OCEAN 2 Plus single-phase6 on OCEAN 2 single-phase / PowerOcean 1ph · 9 on PowerOcean 3ph, per EcoFlow's battery/inverter matrix (row 'Only Ocean 2 battery 8kWh')
- Mixed stacking
- OCEAN 2 + PowerOcean gen-1 mixed use capped at 4 modules per stack>4 packs per stack requires local-regulation and firmware check
- Mounting system
- Uses the EcoFlow OCEAN 2 LFP Battery Basedual-tower systems tie together with the EcoFlow Battery Stack Bridge (base spacing 94.6–104.5 mm) · bridged units must be identical models
Family Platform (shared OCEAN 2 battery architecture)
- Cycle life (family claim)
- 10,000+ battery cell cycles for OCEAN 2 LFP battery packs (EcoFlow family claim)
- Warranty
- 15 years on OCEAN 2 battery products per EcoFlow (capacity-retention terms per EcoFlow warranty policy)
- Communication
- CAN (OCEAN 2 battery platform)
Project fit
Where this model fits.
Scenarios that show which projects the EcoFlow OCEAN 2 Battery 8.0 kWh (EF BD-8-S2) belongs in, what to verify before quoting, and when another model is the better pick.
High-Demand Electrified Homes & Small Commercial Sites (16–24 kWh Storage)
Properties seeking 16 kWh to 24 kWh of storage in a low-ceiling basement or tight garage footprint.
Stacking two modules gives 16.0 kWh (under 1 m tall); stacking three modules gives 24.0 kWh in a single column.
- BoundaryIf the household only requires 5 to 10 kWh of total storage, step down to the OCEAN 2 5.02 kWh Battery (EF BD-5-S2). ---
- If the household only requires 5 to 10 kWh of total storage, step down to the OCEAN 2 5.02 kWh Battery (EF BD-5-S2). ---
Documents
EcoFlow OCEAN 2 LFP Battery 8kWh Installation Guide ENProduct questions
Can I mix 5.02 kWh and 8.0 kWh OCEAN 2 modules in the same installation?
Yes. EcoFlow's pack-level DC-DC architecture supports mixed-capacity stacking. Because each module regulates its output voltage to a standardized 800 V DC bus independently, you can combine a 5.02 kWh module and an 8.0 kWh module in the same system without SOC imbalance or capacity penalties.
System components
Required components
EcoFlow OCEAN 2 hybrid inverter (e.g. HD-P3-10K0-S2)
Item number: DLK-ECOFLOW-EFHDP310K0S2
The battery must only be operated with EcoFlow hybrid inverters (OCEAN 2 three-phase / OCEAN 2 Plus single-phase / PowerOcean); it is the inverter that provides grid connection, backup switching and HEMS control.
EcoFlow OCEAN 2 LFP Battery Base
Item number: DLK-ECOFLOW-OCEAN2-BASE
Floor-standing towers stack on the OCEAN 2 battery base (adjustable levelling feet, spirit level, click-on terminal), one base per stack of up to 6 modules.
Recommended components
EcoFlow Battery Stack Bridge
Item number: DLK-ECOFLOW-STACK-BRIDGE
For dual-tower systems: bracket that rigidly ties adjacent towers (OCEAN 2 base spacing 94.6-104.5 mm); EcoFlow recommends bracing both sides of each battery unit and seismic restraint where applicable.
Optional components
EcoFlow Battery Junction Box
Item number: DLK-ECOFLOW-EFBDJCS1
Required only for cascaded multi-stack configurations (up to 3 junction boxes in parallel; built-in 1500 V DC / 32 A fuse and battery switch). A single stack under the integrated OCEAN 2 inverter does not need one.
EcoFlow PowerOcean LFP Battery 5.1 kWh (BD-5.1-S1, gen 1)
Item number: DLK-ECOFLOW-EFBD51S1
Cross-generation mixing is supported (max 4 modules per stack in mixed use), relevant when expanding an existing PowerOcean installation with OCEAN 2 hardware.
Approved pairings
EcoFlow OCEAN 2 HD-P1-10K0-S2 (10 kW single-phase hybrid, 2026 flagship)Item number DLK-ECOFLOW-EFHDP110K0S2Up to 12 EF BD-5-S2 modules per inverter; a stack holds 6 floor-mounted or 3 wall-mounted, so 12 modules means two towers. Mixed stacking with the older PowerOcean LFP module is supported (OCEAN 2 battery manual p7).
EcoFlow OCEAN 2 HD-P1-12K0-S2 (12 kW single-phase hybrid, 2026 flagship)Item number DLK-ECOFLOW-EFHDP112K0S2Up to 12 EF BD-5-S2 modules per inverter; a stack holds 6 floor-mounted or 3 wall-mounted, so 12 modules means two towers. Mixed stacking with the older PowerOcean LFP module is supported (OCEAN 2 battery manual p7).
EcoFlow OCEAN 2 HD-P1-6K0-S2 (6 kW single-phase hybrid, 2026 flagship)Item number DLK-ECOFLOW-EFHDP16K0S2Up to 12 EF BD-5-S2 modules per inverter; a stack holds 6 floor-mounted or 3 wall-mounted, so 12 modules means two towers. Mixed stacking with the older PowerOcean LFP module is supported (OCEAN 2 battery manual p7).
EcoFlow OCEAN 2 HD-P1-8K0-S2 (8 kW single-phase hybrid, 2026 flagship)Item number DLK-ECOFLOW-EFHDP18K0S2Up to 12 EF BD-5-S2 modules per inverter; a stack holds 6 floor-mounted or 3 wall-mounted, so 12 modules means two towers. Mixed stacking with the older PowerOcean LFP module is supported (OCEAN 2 battery manual p7).
EcoFlow OCEAN 2 HD-P3-10K0-S2 (10 kW three-phase hybrid, 2026 flagship)Item number DLK-ECOFLOW-EFHDP310K0S2Up to 12 EF BD-5-S2 modules per inverter; 6 per tower floor-mounted, 3 wall-mounted.
EcoFlow OCEAN 2 HD-P3-12K0-S2 (12 kW three-phase hybrid, 2026 flagship)Item number DLK-ECOFLOW-EFHDP312K0S2Up to 12 EF BD-5-S2 modules per inverter; 6 per tower floor-mounted, 3 wall-mounted.
EcoFlow OCEAN 2 HD-P3-6K0-S2 (6 kW three-phase hybrid, 2026 flagship)Item number DLK-ECOFLOW-EFHDP36K0S2Up to 12 EF BD-5-S2 modules per inverter; 6 per tower floor-mounted, 3 wall-mounted.
EcoFlow OCEAN 2 HD-P3-8K0-S2 (8 kW three-phase hybrid, 2026 flagship)Item number DLK-ECOFLOW-EFHDP38K0S2Up to 12 EF BD-5-S2 modules per inverter; 6 per tower floor-mounted, 3 wall-mounted.