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Description

3.68 kW on AC. Two MPPT routes on the roof.

EF HD-P1-3K68-S2 is the 3,680 W model of the EcoFlow OCEAN 2 single-phase hybrid range. Two MPPT channels take up to 9,680 W of PV; 9,680 W is the PV input limit, not the AC power delivered to the house.

  • AC side

    3,680 W rated on-grid output and 3,680 VA at the separate BACKUP output.

  • Two MPPT channels

    18 A maximum input current on a single PV input, 16 A on a dual PV input; MPPT voltage range 90–520 V.

  • IP65, 21.5 kg, 679.6 × 182.7 × 280 mm without the IOT and 4G dongle; natural convection.

More product details

Rated on-grid output is 3,680 W. On the PV side, two MPPT channels and a 9,680 W maximum shape the string plan without turning this into a 9,680 W AC inverter.

  • MPPT range 90–520 V; maximum PV input 600 V.
  • 18 A per MPPT on a single PV input, 16 A on a dual PV input.
  • BACKUP output 3,680 VA; the connected circuits follow the system design.
Two MPPT channels at 3.68 kW AC

Rated on-grid output is 3,680 W. The PV side allows 9,680 W maximum, with two MPPT channels and a 90–520 V MPPT window.

A separate BACKUP output

BACKUP maximum output is 3,680 VA. The circuits wired to that output are the backup side; this rating is not a whole-house continuity promise.

WLAN, Bluetooth, WAN and optional 4G

Communication is RS485, CAN, WLAN, Bluetooth, WAN and 4G. The IOT dongle in the carton is configured at commissioning; the 4G dongle is optional.

Technical data

OCEAN 2 single-phase · 3.68 kW AC

Two MPPT channels on a 3.68 kW single-phase inverter.

EF HD-P1-3K68-S2 is 3,680 W rated AC, with 9,680 W maximum PV input and two MPPT channels.

Rated AC output
3,680 W
MPPT channels
2
Max. PV input
9,680 W
DC input (PV)
Model
EF HD-P1-3K68-S2
Maximum PV power
9680 W
Maximum input voltage
600 V
MPPT voltage range
90–520 V
Maximum input current per MPPT
18 (single PV input), 16 (dual PV input) A
Maximum short-circuit current per MPPT
20 A
Number of MPPTs
2
DC input (battery)
Rated voltage
790 V
Maximum voltage
800 V
Rated current
7.6 A
Maximum current
7.6 A
AC output (on-grid) and BACKUP
Grid connection
L+N+PE
220/230/240 V
Rated output power (on-grid)
3680 W
Maximum apparent power (on-grid)
3680 VA
Rated output current (on-grid)
16 A
Maximum output current (on-grid)
18.4 A
BACKUP maximum output power
3680 VA
Nominal frequency
50/60 Hz
THD (at rated power)
≤5%
Power factor
0.8 leading ~ 0.8 lagging
Device data
Maximum efficiency
>96.5%
European weighted efficiency
>96%
Ingress protection
IP65
Weight
21.5 kg
Dimensions (W × D × H)
679.6 × 182.7 × 280 mm
without IOT and 4G dongle
Operating temperature
−20 to 50 °C
derating above 40 °C or below 0 °C
Communication
RS485 & CAN & Wi-Fi & Bluetooth & WAN & 4G
Grid-connection certificate
EN 50549-1:2019+A1:2023 / EN 50549-10:2022
DEKRA Certificate of Conformity 4951182.02COC, 24 March 2026, expires 24 March 2031

Project fit

Where this model fits.

Scenarios that show which projects the EcoFlow OCEAN 2 HD-P1-3K68-S2 (3.68 kW single-phase hybrid) belongs in, and the limits behind our engineers' recommendation.

01
Project scenario

A single-phase connection at 3.68 kW AC

The project has a single-phase grid connection and does not need a higher AC rating.

Two MPPT channels and a 9,680 W PV limit sit on a 3,680 W AC rating. GRID connection is L+N+PE at 220/230/240 V.

  • Two MPPT channels; 9,680 W maximum PV input.
  • 3,680 W on-grid; 3,680 VA BACKUP.
Limits for the configuration
  • String voltage and current, the local grid type (TN-S, TN-C, TN-C-S or TT) and the BACKUP circuits set the design.

Documents

OCEAN 2 Single-Phase Hybrid Inverter Datasheet (EN) Datasheet · PDF · EN OCEAN 2 Single-Phase Hybrid Inverter User Manual V1.3 (DE) Manual · PDF · DE OCEAN 2 Single-Phase Installation Guide V1.7 (DE) Manual · PDF · DE OCEAN 2 Single-Phase brochure (EN) PDF · EN DEKRA Certificate of Conformity 4951182.02COC (EN 50549-1/-10) Certificate · PDF · EN

Product questions

Which circuits receive power through the HD-P1-3K68-S2 BACKUP connection?

The unit has a dedicated BACKUP output rated 3,680 VA. The circuits wired to that output form the backup side; other building circuits are not made backup circuits by the inverter rating alone.

How many of these inverters can be cascaded?

Up to three EF HD-P1-(3K/3K68/4K6/5K/5K75/6K)-S2 units can be cascaded. Each cascaded inverter has its own RCD.

Is the IOT dongle required?

The EcoFlow IOT-Dongle ESS is in the inverter carton and must be configured. A 4G dongle ESS (EU) is optional and obtained separately.

System components

Recommended components

EcoFlow IOT-Dongle ESS

The inverter carton includes the IOT dongle; it must be configured at commissioning.

Optional components

OCEAN 2 LFP Battery EF BD-5-S2

Item number: DLK-ECOFLOW-EFBD5S2

The family datasheet includes EF BD-5-S2. The German installation guide’s battery chapter is written for EcoFlow PowerOcean LFP-Akku; confirm the layout for this inverter before the order.

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OCEAN 2 LFP Battery EF BD-8-S2

Item number: DLK-ECOFLOW-EFBD8S2

The family datasheet includes EF BD-8-S2. The German installation guide’s battery chapter is written for EcoFlow PowerOcean LFP-Akku; confirm the layout for this inverter before the order.

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EcoFlow 4G-Dongle ESS (EU)

Optional. Obtained separately.