EcoFlow Battery System
Orderable · lead time confirmed after order
EcoFlow OCEAN 2 Battery 5.02 kWh (EF BD-5-S2)
The 5.02 kWh (4.85 kWh usable) high-voltage LFP module the whole OCEAN 2 platform is built on: 46 kg, 279 mm high, IP66, stacking wire-free from 5 to 30 kWh per tower and up to 60 kWh on one inverter.
- 5.02 kWh nominal / 4.85 kWh usable per module; 3.4 kW discharge, 2.5 kW charge (4.08 kW peak)
- Stacks wire-free to 30 kWh per tower, up to 12 modules / 60 kWh per OCEAN 2 inverter
- 10,000+ cell cycles, 15-year warranty, IP66 for indoor or outdoor mounting
- Cross-compatible with PowerOcean gen-1 systems · request a quote
- 4.85 kWh
- Usable energy
- 5.02 kWh
- Nominal energy
- 400 / 800 V
- Nominal voltage
- LiFePO₄
- Cell chemistry
- Manufacturer
- EcoFlow
- Model code
- EF BD-5-S2
- Item no.
- DLK-ECOFLOW-EFBD5S2
- Delivery
- Germany delivery estimate: EUR 85–205 · The final delivery charge is included in your Proforma.
Plan with EF BD-5-S2
New system, extension or replacement? Linker Advisor starts from this article and asks only for what is still open — existing model, quantity, postcode, installation date.
Required to install — not in the box
EcoFlow OCEAN 2 HD-P3-10K0-S2 (10 kW three-phase hybrid, 2026 flagship)
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.
View 
EcoFlow OCEAN 2 LFP Battery 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.
View Figures transcribed from the manufacturer datasheet on file. Confirm your grid code and configuration with our engineers before ordering.
- GoodWe · SAJ · Pylontech · EcoFlow · Chint paired from the maker’s own lists
- Datasheets on file for every item
- Within 24 h engineering response
- MOQ 1 unit · EU delivery
- Engineering-checked configurations
Capacity logic
Modules that scale with the project
5 and 8 kWh LFP packs stack to 60 kWh per inverter; cross-compatible with gen-1 PowerOcean packs.
5.02 kWh nominal / 4.85 kWh usable per module; 3.4 kW discharge, 2.5 kW charge (4.08 kW peak)
Stacks wire-free to 30 kWh per tower, up to 12 modules / 60 kWh per OCEAN 2 inverter
10,000+ cell cycles, 15-year warranty, IP66 for indoor or outdoor mounting
Headline feature
All-new OCEAN 2 LFP pack — 10,000+ cell cycles
EcoFlow's second-generation residential pack: LiFePO4 chemistry engineered for 10,000+ battery cell cycles, delivering 'reliable energy storage, year after year' for daily cycling and long-term energy planning.
Each 5 kWh module discharges at 3.4 kW, so capacity and power scale together as modules are added.
In pictures
Inspect it before you spec it.
Official renders, installation photos and system panels for this model line.
Official manufacturer product render
Documentation
Specifications
Every value exactly as published in the official EF BD-5-S2 documentation.
Nominal capacity5.02 kWh per module
Usable capacity4.85 kWh (0.2C, 100% DoD, 25 °C, beginning of life)
Cell chemistryLiFePO4 (LFP)
Nominal charging / discharging power2,500 W / 3,400 W per module
Max. discharging power4,080 W (sustained ≥20 minutes, lab conditions)
Nominal voltage / operating range400/800 V; 360–520 V / 720–960 V
Cycle life10,000+ battery cell cycles (EcoFlow official claim)
Depth of discharge100%
Stack configurationsBD-5-S2 5.02 → BD-10 10.04 → BD-15 15.06 → BD-20 20.08 → BD-25 25.10 → BD-30-S2 30.12 kWh per tower (1–6 modules)
Per-stack charge / discharge power (800 V)1 module: 2.5/3.4 kW2: 5.0/6.8 kW · 3: 7.5/10.2 kW · 4: 10.0/13.6 kW · 5: 12.5/17.0 kW · 6: 15.0/20.4 kW
Modules per stackFloor stand: up to 6 batteries per stack (up to 4 stacks in parallel)wall mounted: up to 3
Modules per inverterUp to 12 modules on OCEAN 2 three-phase / OCEAN 2 Plus single-phase (9 on PowerOcean three-phase, 6 on single-phase OCEAN 2 / PowerOcean 1ph) per EcoFlow's compatibility matrix
Compatible invertersOCEAN 2 Hybrid Inverter Three-Phase, OCEAN 2 Plus Single-Phase, OCEAN 2 Single-Phase, PowerOcean Three-/Single-Phase, PowerOcean Plus Three-Phase
Mixed stacking with PowerOcean gen-1 packsOfficially supported (hybrid stacking)max 4 modules per stack in mixed use
CommunicationCAN
Dimensions / weight per module680 × 196 × 279 mm (W×D×H)46 kg — 279 mm module height, footprint under 0.15 m²
Ingress protectionIP66 (indoor/outdoor)bottom battery module rated for up to 72 h water immersion under specified test conditions
Operating / storage temperature-20 °C to +55 °C operating (derating above 40 °C)-25 °C to +60 °C storage · max. 3,000 m altitude
CoolingNatural cooling (no fans in the battery)
Battery protectionsOver-charge/discharge, over-/under-voltage, over-current, short-circuit, reverse-polarity, temperature, thermal-runaway, leakage-current, insulation, over-pressure protection, automatic power-off, emergency shutdownBMS embedded per pack · active aerosol fire-protection module in every pack
Warranty15 years (capacity-retention terms per EcoFlow warranty policy)
Packaging (VPE)1 per carton, 10 per pallet
Product
Complete the system
Balance-of-system and accessories paired with this model. Every pairing follows the manufacturer's official compatibility list.
Required
EcoFlow OCEAN 2 hybrid inverter (e.g. HD-P3-10K0-S2)
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.
View product → 
EcoFlow OCEAN 2 LFP Battery 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.
View product → - [1]EcoFlow OCEAN 2 hybrid inverter (e.g. HD-P3-10K0-S2)
- [2]EcoFlow OCEAN 2 LFP Battery Base
Recommended
EcoFlow Battery Stack Bridge
For dual-tower systems: official 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.
View product → - [1]EcoFlow Battery Stack Bridge
Optional
EcoFlow Battery Junction Box
Required only for cascaded multi-stack configurations (up to 3 junction boxes in parallelbuilt-in 1500 V DC / 32 A fuse and battery switch). A single stack under the integrated OCEAN 2 inverter does not need one.
View product → 
EcoFlow PowerOcean LFP Battery 5.1 kWh (BD-5.1-S1, gen 1)
Cross-generation mixing is officially supported (max 4 modules per stack in mixed use) — relevant when expanding an existing PowerOcean installation with OCEAN 2 hardware.
View product → - [1]EcoFlow Battery Junction Box
- [2]EcoFlow PowerOcean LFP Battery 5.1 kWh (BD-5.1-S1, gen 1)
Approved pairings
EcoFlow OCEAN 2 HD-P1-10K0-S2 (10 kW single-phase hybrid, 2026 flagship)
Item no. DLK-ECOFLOW-EFHDP110K0S2 On EcoFlow's compatibility list | 1-12 modules
EcoFlow OCEAN 2 HD-P1-12K0-S2 (12 kW single-phase hybrid, 2026 flagship)
Item no. DLK-ECOFLOW-EFHDP112K0S2 On EcoFlow's compatibility list | 1-12 modules
EcoFlow OCEAN 2 HD-P1-6K0-S2 (6 kW single-phase hybrid, 2026 flagship)
Item no. DLK-ECOFLOW-EFHDP16K0S2 On EcoFlow's compatibility list | 1-12 modules
EcoFlow OCEAN 2 HD-P1-8K0-S2 (8 kW single-phase hybrid, 2026 flagship)
Item no. DLK-ECOFLOW-EFHDP18K0S2 On EcoFlow's compatibility list | 1-12 modules
EcoFlow OCEAN 2 HD-P3-10K0-S2 (10 kW three-phase hybrid, 2026 flagship)
Item no. DLK-ECOFLOW-EFHDP310K0S2 On EcoFlow's compatibility list | 1-12 modules
EcoFlow OCEAN 2 HD-P3-12K0-S2 (12 kW three-phase hybrid, 2026 flagship)
Item no. DLK-ECOFLOW-EFHDP312K0S2 On EcoFlow's compatibility list | 1-12 modules
EcoFlow OCEAN 2 HD-P3-6K0-S2 (6 kW three-phase hybrid, 2026 flagship)
Item no. DLK-ECOFLOW-EFHDP36K0S2 On EcoFlow's compatibility list | 1-12 modules
EcoFlow OCEAN 2 HD-P3-8K0-S2 (8 kW three-phase hybrid, 2026 flagship)
Item no. DLK-ECOFLOW-EFHDP38K0S2 On EcoFlow's compatibility list | 1-12 modules
What this unit is approved to run with.
Every pairing below traces to a manufacturer compatibility list, by document version and date. A pairing only one maker lists is marked; we quote it, an engineer confirms it.
EcoFlow OCEAN 2 HD-P1-10K0-S2 (10 kW single-phase hybrid, 2026 flagship)
Item no. DLK-ECOFLOW-EFHDP110K0S2 On EcoFlow's compatibility list | 1-12 modules
EcoFlow OCEAN 2 HD-P1-12K0-S2 (12 kW single-phase hybrid, 2026 flagship)
Item no. DLK-ECOFLOW-EFHDP112K0S2 On EcoFlow's compatibility list | 1-12 modules
EcoFlow OCEAN 2 HD-P1-6K0-S2 (6 kW single-phase hybrid, 2026 flagship)
Item no. DLK-ECOFLOW-EFHDP16K0S2 On EcoFlow's compatibility list | 1-12 modules
EcoFlow OCEAN 2 HD-P1-8K0-S2 (8 kW single-phase hybrid, 2026 flagship)
Item no. DLK-ECOFLOW-EFHDP18K0S2 On EcoFlow's compatibility list | 1-12 modules
EcoFlow OCEAN 2 HD-P3-10K0-S2 (10 kW three-phase hybrid, 2026 flagship)
Item no. DLK-ECOFLOW-EFHDP310K0S2 On EcoFlow's compatibility list | 1-12 modules
EcoFlow OCEAN 2 HD-P3-12K0-S2 (12 kW three-phase hybrid, 2026 flagship)
Item no. DLK-ECOFLOW-EFHDP312K0S2 On EcoFlow's compatibility list | 1-12 modules
EcoFlow OCEAN 2 HD-P3-6K0-S2 (6 kW three-phase hybrid, 2026 flagship)
Item no. DLK-ECOFLOW-EFHDP36K0S2 On EcoFlow's compatibility list | 1-12 modules
EcoFlow OCEAN 2 HD-P3-8K0-S2 (8 kW three-phase hybrid, 2026 flagship)
Item no. DLK-ECOFLOW-EFHDP38K0S2 On EcoFlow's compatibility list | 1-12 modules
Pick the rating
EcoFlow OCEAN 2 (LFP Battery) family. Same engineering, different size.
3 ratings
Same series, same engineering — your model is highlighted.
Cell chemistry
LiFePO₄
LFP
—
Ingress protection
IP66
—
IP66
Weight
46 kg
—
Approx. 36.5 kg
Every figure comes straight from the manufacturer's official datasheet.
Configuration 3
EcoFlow publishes both a nominal and a usable figure per BD-5-S2 module, and storage sizing should be quoted on the usable number.
- Per module: 5.02 kWh nominal, 4.85 kWh usable (measured at 0.2C charge/discharge, 100% depth of discharge, 25 °C, beginning of life)
- 6-module tower: 30.12 kWh nominal, about 29 kWh usable
- 12-module system (one three-phase inverter): roughly 58 kWh usable; pv magazine Deutschland lists it as 57.6 kWh usable per inverter
- Discharge power: 3.4 kW per module, up to 20.4 kW per 6-module stack at 800 V
The BD-5-S2 is a parallel-connected high-voltage battery compatible across EcoFlow's residential line, and it must only be operated with EcoFlow hybrid inverters.
- Compatible inverters: OCEAN 2 Hybrid Inverter Three-Phase, OCEAN 2 Plus Single-Phase, OCEAN 2 Single-Phase, PowerOcean Three-Phase, PowerOcean Single-Phase, PowerOcean Plus Three-Phase
- Third-party inverters and mixed-brand battery strings are explicitly excluded by the manual
- Maximum module counts: 12 on OCEAN 2 3ph / Plus 1ph, 9 on PowerOcean 3ph, 6 on the single-phase units
- Check the official matrix per project
Modules stack wire-free via click-on terminals on the OCEAN 2 battery base, and previous-generation PowerOcean packs can be mixed in.
- Per tower: up to 6 modules floor-standing (3 wall-mounted)
- Parallel towers: junction boxes, up to 3 in parallel, connect cascaded stacks
- Per inverter: up to 12 modules on one OCEAN 2 three-phase or OCEAN 2 Plus inverter
- Mixed stacking: hybrid stacking with previous-generation PowerOcean LFP packs is officially supported, capped at 4 modules per stack in mixed use, so existing gen-1 installs can be expanded rather than replaced
- EcoFlow's caveat: for more than 4 packs in one stack, verify local regulations and that the installed firmware supports 6-pack stacks
- Failed modules are isolated automatically so the rest of the stack keeps operating
Availability & compliance 1
The OCEAN 2 LFP battery is certified across several safety, EMC and application standards.
- Battery/safety certification: IEC/EN 62619 (safety of industrial lithium cells/batteries), IEC/EN 62040-1, IEC/EN 62477-1, ISO 13849-1, VDE-AR-E 2510-50 (the German application rule for stationary lithium storage)
- CE-marked, ships under UN 38.3
- EMC: EN 61000-6-1/-2/-3/-4
- Grid-code compliance (VDE-AR-N 4105 / EN 50549 in Germany) sits with the OCEAN 2 hybrid inverter the battery operates behind; the battery itself must only be operated with EcoFlow hybrid inverters per the manual
- EcoFlow also states its products meet the German BattG battery-law requirements for disposal/return
Operation & warranty 1
Warranty
EcoFlow grants 15 years on the battery (pv magazine Deutschland; capacity-retention terms follow EcoFlow's warranty policy, request the document for exact figures).
Storage and handling
- Storage: -25 °C to +60 °C (0-35 °C recommended), in original packaging
- Long-term storage: keep at ~60% state of charge and cycle 30%→60% every three months
- Never rail- or air-freight the modules
- Power the system on promptly after installation to avoid capacity loss
- Charge/discharge power derates above 40 °C ambient and below 0 °C; a built-in heater conditions the pack in cold weather
Next step
Send the project. Hear from an engineer within 24 hours.
Loads, tariff, site constraints - our engineers reply with a compatibility check and a sizing recommendation.
Contact project supportOr write to linker01@de-linker.com — attach your load profile if you have one.