EcoFlow OCEAN 2 Three-Phase
A three-phase hybrid inverter with stackable 5.02 and 8.03 kWh LFP batteries, up to 96 kWh per inverter, whole-home backup and IP66 protection.
- Best for whole-home backup
- Installed battery
- Up to 96 kWh
- 15-year warranty
- Made by EcoFlow.
- Energy: built from OCEAN 2 LFP batteries of 5.02 kWh or 8.03 kWh, up to 12 modules (96 kWh) with one inverter.
- Inverter: 3 solar trackers, up to 24 kW of panels and 5, 6, 8, 10, 12 or 15 kW of AC output.
- Backup: whole-home backup up to 63 A with a 0 ms switchover under supported grid conditions, without an external backup box.
- Generation: EcoFlow's OCEAN 2 is the current generation next to the earlier PowerOcean series, and OCEAN 2 batteries mix with PowerOcean batteries.
Not tested by us
We have not tested the EcoFlow OCEAN 2 Three-Phase. The figures on this page come from the sources listed at the end of the page, checked on 13 November 2026, and we do not show prices. "Best for" is based on what the maker says the product is designed for, not on our own tests.
Key figures
Up to 96 kWh
Per inverter (12 modules)
5-15 kW
AC output (by inverter size)
15 years
Inverter and 5 kWh battery warranty
Specifications
Last checked on 13 November 2026. The grey text under each name explains what the value means. To see it next to other products, compare it in our comparison tool.
| Specification | Value |
|---|---|
| Storage | |
| CapacityHow much energy the battery stores. Bigger means longer runtime or more of your own solar power used later. | 5.02 kWh (OCEAN 2 LFP Battery 5 kWh) or 8.03 kWh (8 kWh) per module |
| Usable capacityThe part of the stored energy you can actually use. It is lower than the nominal capacity. | 4.87 kWh (5 kWh module) or 7.76 kWh (8 kWh module). The 5 kWh manual lists 5 and 4.85 kWh |
| Battery chemistryLFP (lithium iron phosphate) cells are known for long life and stable behaviour with heat. | LiFePO4 |
| Cycle lifeHow many full charge and discharge cycles the cells are rated for before they hold less than the stated share of their original capacity. | 10,000+ battery cell cycles |
| ExpansionExtra battery units that add storage to the same system. | Up to 12 battery modules with one inverter (up to 96 kWh). Floor mounting: up to 6 per stack (verify local regulations and firmware above 4); wall mounting: up to 3 per stack. 5 kWh and 8 kWh modules can be mixed |
| Power | |
| AC output, grid-connectedThe lower output allowed when it feeds power into the home's circuits or the grid. | 5, 6, 8, 10, 12 or 15 kW (inverter sizes) |
| Charge and discharge powerHow fast the battery can take in and give out energy. It sets how many devices it can serve at once. | Per module: 5 kWh: 2.5 kW charge, 3.4 kW discharge; 8 kWh: 4.1 kW charge, 4.1 kW discharge |
| Maximum discharge powerA higher output the battery can hold only for a limited time, given here per battery module. | Per module: 4.08 kW (5 kWh, at most 20 minutes) or 6.4 kW (8 kWh, at most 30 minutes) |
| Battery voltageThe voltage of the battery side. High-voltage batteries (hundreds of volts) only work with an inverter built for that range. | Nominal 400 / 800 V; operating range 360-520 / 720-960 V |
| Round-trip efficiencyThe share of the energy you put in that comes back out. The rest is lost as heat. | Not stated |
| Backup in a power cutWhether it can keep selected circuits running during a grid outage. | Whole-home backup up to 63 A, with no external backup box. A generator can be connected through an ATS |
| Backup switchover (EPS)What happens when the grid fails. EPS means it takes over automatically. | 0 ms in both directions (grid to off-grid and back), under supported grid conditions |
| Solar | |
| Solar inputsThe number of panel strings it can track separately (MPPT) and the total DC power. | 3 MPP trackers with 1 string each; 24 kW max PV input |
| Solar inverterTurns the DC power from solar panels into AC for the home. Built in means no separate solar inverter is needed. | Built in: the hybrid inverter takes solar panels, battery and grid |
| Solar and off-grid | |
| Works with solar panelsWhether you can charge it from solar panels. Yes means a built-in solar input or a compatible solar setup; read the detail for the voltage and power limits. | Yes: built-in solar inputs (3 trackers, up to 24 kW). It also connects to an existing third-party solar system. |
| Off-grid useWhether the maker describes it running with no grid connection at all, for example in a cabin, van or off-grid home. Backup only means it covers power cuts but needs the grid the rest of the time. | Partly: backup during a grid outage, with up to 2 inverters cascaded in off-grid mode. EcoFlow does not describe a stand-alone off-grid system. |
| Connection and housing | |
| Grid connectionThe supply type it is built for. Check it matches your home's supply. | Three-phase hybrid inverter; max input current on-grid 63 A; up to 5 inverters cascaded on-grid. Grid voltage is not stated on the page |
| Parallel modeLinking units so their outputs add up. | Up to 5 cascaded inverters on-grid and up to 2 off-grid |
| Dimensions (W × D × H)Check the space before you buy, including room around it for airflow and cables. | Inverter 680 × 406.5 × 203 mm; 5 kWh battery 680 × 196 × 279 mm; 8 kWh battery 680 × 196 × 378 mm |
| WeightMatters for lifting, wall mounting and moving it. | Inverter approx. 36.5 kg; 5 kWh battery 46 kg; 8 kWh battery 67.5 kg |
| MountingWhere and how it can be fixed: on the floor, on a stand or on a wall. It decides the space and the wall strength you need. | Inverter: floor stand or wall mounted. Batteries: floor stack of up to 6, or wall mounted stack of up to 3 |
| Protection ratingIP ratings show protection from dust and water. IP55 and IP65 are rated for outdoor-style exposure; check the installation guidance. | IP66 (inverter and batteries); outdoor or indoor use. EcoFlow rates the bottom battery module for up to 72 hours of water immersion |
| Operating temperatureThe range it is rated to work in. Cold and heat can reduce performance. | Batteries: -20 to 55 °C (power may be derated above 40 °C); storage -25 to 60 °C. Inverter: not stated |
| CoolingHow the heat is removed. Natural cooling is silent; air cooling uses a fan. | 5 kWh module: natural cooling; 8 kWh module: intelligent air cooling |
| ConnectivityHow you monitor and control it, usually through an app. | Not stated for the inverter. The batteries talk to the inverter over CAN; EcoFlow's app, web portal and PowerInsight 2 are listed for monitoring |
| CertificationsSafety and grid standards the maker says the product meets. | Batteries: IEC/EN 62619, IEC/EN 62040-1, IEC/EN 62477-1, ISO 13849-1, VDE-AR-E 2510-50, UN 38.3 (8 kWh module also SA TS 5398) |
| Warranty | |
| WarrantyThe period the maker covers. Read the terms: conditions and capacity guarantees differ. | Inverter 15 years; 5 kWh battery 15 years; 8 kWh battery 10 years plus an optional 5-year extension |
Compatible with
What EcoFlow says this product works with. Anything not listed here is not confirmed.
- Batteries
- OCEAN 2 LFP Battery 5 kWh and 8 kWh. EcoFlow says OCEAN 2 can be combined with earlier PowerOcean batteries, with limits set in its compatibility table.
- Inverters
- EcoFlow's 5 kWh battery manual lists the OCEAN 2 Three-Phase, OCEAN 2 Plus Single-Phase, OCEAN 2 Single-Phase and the PowerOcean hybrid inverters as compatible with the OCEAN 2 battery.
- Existing solar
- EcoFlow says it integrates with existing third-party solar systems and supports up to five cascading connections.
- Generators
- Generator integration through an ATS for backup during long outages.
- EcoFlow devices
- EcoFlow lists PowerPulse (EV charger), PowerHeat (air-to-water heat pump), PowerInsight (home energy manager) and Smart Plug in the same ecosystem, and says it supports 500+ dynamic tariff integrations.
Rules where you live
An installed battery normally needs a qualified electrician, and in many countries you must also tell your grid operator, especially if it can export. This is not a plug-in battery. Rules, incentives and tax treatment differ by country: see our country guides for what applies where you live.
Strengths and things to check
Strengths
- Up to 96 kWh with one inverter, in modules of 5.02 or 8.03 kWh
- Whole-home backup up to 63 A with 0 ms switchover, without a separate backup box
- Three solar trackers and up to 24 kW of panels
- IP66 on inverter and batteries, floor or wall mounted
- 15-year warranty on the inverter and the 5 kWh battery
Worth checking before you buy
- Round-trip efficiency, inverter operating temperature and noise are not on the pages we read
- The 0 ms switchover applies only under conditions EcoFlow sets (local grid rules, stable grid, load within the backup rating)
- Off-grid cascading is limited to 2 inverters
- The 8 kWh battery has a 10-year compulsory warranty plus an optional 5 years
- EcoFlow's feature pages say 'up to 6.4 kWh' for battery discharge power; its datasheet gives 6.4 kW
Change log
We record changes to this page here, so you can see when figures such as the warranty were last updated.
- 13 November 2026
- Page published. Warranty at publication: inverter 15 years, 5 kWh battery 15 years, 8 kWh battery 10 years plus an optional 5 (EcoFlow product page). OCEAN 2 also comes as Single-Phase and Plus Single-Phase variants, which are not covered here.
Where this information comes from
We have not tested the OCEAN 2 Three-Phase. Figures for the inverter and the battery sizes come from the OCEAN 2 Three-Phase page on EcoFlow's UK energy site. Battery details such as usable capacity, maximum discharge power, temperatures and certificates come from the OCEAN 2 LFP Battery table in EcoFlow's OCEAN 2 Plus Single-Phase datasheet, and stack limits from EcoFlow's compatibility table, all last checked on 13 November 2026. We did not find a datasheet for the OCEAN 2 Three-Phase inverter itself, so a value that none of these sources states is shown as not stated.
We do not show prices, because they depend on the installer's quote.
- Manufacturer EcoFlow UK OCEAN 2 Three-Phase Solar Home Battery Storage page
- Manufacturer EcoFlow OCEAN 2 Plus Single-Phase datasheet (OCEAN 2 LFP Battery table)
- Manufacturer EcoFlow PowerOcean and OCEAN 2 battery compatibility matrix
- Manufacturer EcoFlow OCEAN 2 LFP Battery 5 kWh user manual V1.1
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Common questions about EcoFlow OCEAN 2 Three-Phase
How much does the OCEAN 2 Three-Phase store?
Each OCEAN 2 LFP battery module holds 5.02 kWh or 8.03 kWh. One inverter takes up to 12 modules, which EcoFlow gives as up to 96 kWh. Usable capacity is 4.87 kWh and 7.76 kWh per module on EcoFlow's datasheet.
Is OCEAN 2 the same as PowerOcean?
OCEAN 2 is EcoFlow's newer home battery generation. EcoFlow's site still lists the earlier PowerOcean, PowerOcean Plus and PowerOcean Single-Phase, and says OCEAN 2 batteries can be mixed with PowerOcean batteries within the limits of its compatibility table.
Does it keep the whole house running in a power cut?
EcoFlow lists whole-home backup up to 63 A with a 0 ms switchover and no external backup box. It applies the 0 ms figure only under supported grid conditions and when the load stays within the backup rating, so ask your installer what your supply allows.
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