Manufacturer's Declaration

Confirmation of Compliance with FNN Document "Connection and Operation of Storage Systems on the Low Voltage Grid"

EcoFlow Inc. hereby confirms that the EcoFlow PowerOcean Plus Hybrid inverters meet the requirements of the FNN document "Connection and Operation of Storage Systems on the Low Voltage Grid" (July 2024 version).

Requirement 4.3: Storage without Feed-in to the Public Grid

If storage charging from the public grid is to occur, it must be technically ensured that the power charged from the grid is not fed back into the public grid.

Requirement 4.2: Energy Flow Monitoring

To prevent feed-in, the energy flow at the grid connection point is measured by a meter (storage system sensor). This data is transmitted to the inverter. EcoFlow Inc. confirms that a functional test (type test) of the storage system sensor has been carried out and confirms its proper functioning.

Requirement 4.4: Power Feed-in Limitation

After parameterization of the inverter, it prevents the feed-in of active power from the home storage system (battery + hybrid inverter) into the public grid. Therefore, the home storage system meets the requirements of the FNN notice for the energy flow direction sensor (Chapter 4.2) and zero feed-in (Chapter 4.4).

Inverter and Sensor Models

Manufacturer Information

Manufacturer: EcoFlow Inc.

Address: RM 401, Plant #1, Runheng Industrial Zone, Fuyuanyi Road, Zhancheng Community, Fuhai Street, Bao'an District, Shenzhen City, Guangdong Province, P.R. China

Product Declaration for VDE-AR-E 2510-2

EcoFlow Inc. declares that the following products, including necessary accessories, meet the requirements of VDE-AR-E 2510-2 Stationary Electrical Energy Storage Systems for Connection to the Low Voltage Grid. Only battery storage systems that have undergone an integration and testing process at EcoFlow Inc. can be connected to the system. System components not listed in this declaration are not considered tested by EcoFlow Inc.

Product Groups Covered

• EcoFlow PowerOcean Plus Hybrid Inverter / EcoFlow PowerOcean Plus Hybrid-Wechselrichter
• Photovoltaic Inverter / Photovoltaik Wechselrichter

Product Type Designation

EF HD-P3-29K9-S1, EF HD-P3-25K0-S1, EF HD-P3-20K0-S1, EF HD-P3-15K0-S1

Compatible Battery Storage Systems

Manufacturer and Type Designation:

• Compatible Battery Systems: EcoFlow PowerOcean LFP Battery (Rechargeable Li-ion Battery Pack/Wiederaufladbarer Li-lon-Akku)
• Product Type Designation: EF BD-5.1-S1

Further Information on the Backup Interface (BI-EU3P according to VDE-AR-E 2510-2:2021:02)

The system emulates a TN-S system in island/backup mode (6.410.2).

A.1 Short-Circuit Current Supply (according to 6.410.2 and 6.430.101)

Maximum possible single-pole AC short-circuit current Isc max:

After a maximum of 120 ms, the inverter trips and stops production (current = 0 A). Automatic reconnection is deactivated by default and can be activated by the installer.

If automatic reconnection is activated:

• Maximum number of reconnection attempts: 3
• Waiting time between reconnection attempts: minimum 60 seconds.

A.2 Voltage Limitation (according to 6.410.2)

In the event of a short circuit, the voltage on the short-circuited phase will not exceed the following values (with a resistance of 0.3 Ω):

Automatic reconnection is deactivated by default and can be activated by the installer.

If the short circuit persists during reconnection, the voltage in the short-circuited phase (with a resistance of 0.3 Ω) will not be exceeded for a maximum of 120 ms:

A.3 Island/Backup Grid Earthing (according to 6.410.2)

Schematic representation including the island/backup grid earthing:

[Diagram: Backup System for the whole house showing PV String, EcoFlow PowerOcean Plus Hybrid Inverter, EcoFlow PowerOcean LFP Battery, Router, Internet connection, APP, Web Portal, Supply Grid, and Consumer Meter.]

For TT/TN-S: In case of failure of the relay that connects N and PE, the inverter will not start island/backup operation.

Short-term Current Carrying Capacity of the Island/Backup Grid

Continuous Current Carrying Capacity of the Island/Backup Grid

A.4 Shutdown in the IT network after the first error

Not applicable.

Place and date of issue:

Name: Jerrett Huang

Signature of authorized person: Jerrett Huang