EcoFlow STREAM Ultra User Manual

About This Manual

This manual contains an introduction to the EcoFlow STREAM Ultra, detailing its operation, management, and maintenance. Please note that this manual may be updated without prior notice. The availability of certain accessories and features may vary by region. All images are for demonstrative purposes only; refer to the actual product received. EcoFlow STREAM Ultra is used as the example product.

For the latest updates and a better experience, access this manual online at https://www.ecoflow.com/support/download/index.

Overview

The EcoFlow STREAM Ultra is a solar storage system designed for new installations and retrofits of existing solar power systems. It features terminals for solar input, grid connection, and two standard AC outlets. Internally, it integrates an inverter, MPPT charge controller, and battery modules for efficient energy storage and management.

Appearance

Diagram of the EcoFlow STREAM Ultra showing key external features: 1. Recess Handle for safely lifting and moving the device. 2. Protective Cover for shielding electrical terminals and outlets from dust, moisture, and accidental contact. 3. Grounding Terminal for providing a supplemental ground connection. 4. DIY Front Case for maintaining original appearance (replacement cases available). 5. Power Button for turning the device on/off and resetting IoT settings. 6. System Status LED indicating the current operating status.

Diagram of the rear/side of the EcoFlow STREAM Ultra showing connection terminals: 7. Parallel Terminal for connecting multiple units to enable system expansion, inter-unit communication, and increased output power (Pending). 8. AC Outlets for supplying power to connected appliances or connecting to a microinverter. 9. AC ON/OFF Button for enabling or disabling the AC outlets. 10. Grid Terminal for connecting the device to the utility grid. 11. PV Terminals for connecting solar panels for power input.

Control Button

Power Button

The button serves the following functions:

• Power On: Press and hold for 2 seconds to turn on the device.
• Power Off: Press and hold for 2 seconds to turn off the device. If solar or grid power is present, disconnect cables before powering off.
• Reset IoT: Press the button 5 times in quick succession to reset Wi-Fi and Bluetooth connections. Resetting IoT settings will unbind the device from your EcoFlow account.

AC ON/OFF Button

The button serves the following function:

• AC On: When outlets are disabled, press once to enable them.
• AC Off: When outlets are enabled, press once to disable them.

LED Indicator

System Status LED

The LED provides a basic indicator of the device's operating status. Specific patterns indicate:

• Device is powered off.
• Current battery level of the device.
• Device is being charged.
• Device is faulty (check the EcoFlow app for instructions).
• A setting has been applied (e.g., system reset, internet setup completion).
• Device is upgrading its firmware.

AC Outlet Status LED

Indicates the status of the AC outlets:

• At least 1 AC outlet is enabled.
• AC outlets are disabled.

Device Expanding Capability

EcoFlow STREAM devices support system expansion to increase total battery capacity, enable power scheduling, unified app-based management, and flexible installation. Multiple STREAM Series devices can be installed based on specific needs.

Use at least 1 STREAM device per location, distributed across different rooms or areas, especially if you have multiple solar power sources facing different directions. In this setup, each device operates independently, with scheduling capacity limited by local grid-feed power regulations.

Maximum Number of Devices

You can connect or install up to 6 STREAM devices in your home.

The compatibility list reflects supported models at publication. For the most up-to-date information, visit the official product website at https://www.ecoflow.com.

Network Requirement

To ensure proper communication and synchronization, all STREAM devices must be connected to the same Wi-Fi network.

Stacking and Placement

STREAM devices can be stacked to save space. Ensure provided securing brackets are properly installed to prevent accidental tipping or falling. Avoid stacking more than two layers.

For detailed mounting instructions, refer to the Installation Guide provided in the product package or available at http://www.ecoflow.com/support/download/.

Get Started

Understand the EcoFlow STREAM Series Plug & Play Solar Plant

The EcoFlow STREAM Series Plug & Play Solar Plant is a residential energy system designed for straightforward integration with home circuits. It stores surplus solar energy and discharges it during periods of high electricity demand or grid outages, helping to reduce utility costs and enhance energy reliability.

Key system components:

• 1. Solar panels: Absorb sunlight and generate DC electricity. Use EcoFlow or compatible third-party panels meeting the device's DC input requirements.
• 2. EcoFlow STREAM Ultra: Feeds power from solar panels into the grid, powers appliances via an outlet or the home's electrical system, and stores excess energy.
• 3. Specified cables: Connect the device to external power sources, electrical devices, and other equipment for proper integration and operation. This includes the EcoFlow STREAM AC Cable for grid connection and the EcoFlow STREAM Solar Panel Extension Cable for solar connection.
• Optional 4. Extra Microinverter: Provides additional power input to feed the grid, charge the battery, or supply connected appliances in bypass mode.
• Optional 5. Smart Sensor: Adjusts system scheduling logic, which can be optimized with smart sensors. The Smart Meter monitors household energy consumption and generation for optimized energy distribution.
• Optional 6. Extra STREAM devices: Expand the system's total battery capacity and offer more flexible installation options.
• 7. EcoFlow App: Enables control and monitoring of the system via your phone.

Electrical codes vary by region. Before setup, check local regulations and consult a qualified electrician to ensure safety and compliance.

Set Up Essential Power Connections

Environment Requirement

Ensure the installation site meets conditions for proper device operation:

1. Install in a dry, clean, and well-ventilated area.
2. Do not expose to direct sunlight, snow, or rain.
3. Avoid installing near water, heat sources, or flammable/explosive materials.

Diagrams show acceptable (checkmark) and unacceptable (cross marks) installation environments.

Solar Connection

Connect solar panels to the device for proper solar power input. Ensure panels meet the device's PV terminal specifications.

1. Connect provided solar cables to the PV terminals on the device.
2. Connect the other ends of the cables to the solar panel connectors.

When connecting solar panels, ensure a single panel's positive and negative leads connect to the same PV terminal pair (e.g., PV1+ and PV1–). Do not connect leads across different pairs (e.g., positive to PV2+ and negative to PV1–) to avoid short circuits. A PV switch must be installed for PV connections to comply with local regulations, with recommended specifications: Current rating > 14A, and certification requirements met by a circuit breaker compliant with ANSI/UL 489B or a disconnect switch compliant with UL 508.

1. Recommended Cable: EcoFlow STREAM Solar Panel Extension Cable.
2. Use the provided PV wrench to adjust solar connections.
3. Keep unused PV terminals covered with protective caps.
4. The device powers on automatically once connected to an active power source.

Grid Connection

Connect the device to the grid to feed power into it or draw power when solar energy is insufficient. This can be done via a standard home outlet (if permitted) or a circuit breaker.

Power Connection Requirements

Follow these connection requirements strictly. Do not modify feed-in power without full understanding and compliance.

The default feed-in power is 360W. Connect directly to a household circuit using a standard home socket. To increase feed-in power (STREAM Ultra supports up to 800W; multiple units up to 1200W), use the tables below for socket setup with the right circuit breaker and wire gauge combination.

Method 1: Dedicated Circuit

Connect the device to a dedicated circuit, such as a weatherproof exterior receptacle.

Method 2: Higher-Rated Breaker

Choose a higher-rated circuit breaker and connect the device to the corresponding socket.

Method 3: Utilize Existing Higher-Gauge Wiring

Replace the circuit breaker on existing higher-gauge wire with a lower-rated one, then connect to the corresponding socket.

1. Modifying feed-in power requires hardware and software configuration. Use the app to set the desired feed-in power after connecting the device.
2. For Methods 2 and 3, consult a qualified electrician if unfamiliar with electrical wiring or local codes.
3. CAUTION: If reconnecting the device, review and follow connection requirements again for safe and proper operation.

Direct Plug-in Connection

For installation sites where direct plug-in to a home outlet is permitted by local regulations:

1. Connect the provided AC cable to the Grid terminal on the device.
2. Tighten the screw on the cable plug to secure the connection.
3. Plug the other end of the cable into a standard home outlet.

Recommended Cable: EcoFlow STREAM AC Cable. The device powers on automatically once connected to an active power source. If used outdoors, connect to an NEMA 4-rated weatherproof outlet.

Grounding Considerations

Proper grounding is essential for safe operation. EcoFlow provides an AC cable with an equipment grounding conductor/plug. If plugged into a properly installed and grounded outlet per local codes, the device will be properly grounded. Consult a qualified electrician if:

• You are unsure if the product is properly grounded.
• The provided plug does not fit the outlet.

If the installation site does not meet grounding requirements or specific standards mandated by local codes, ask a qualified electrician to use the grounding terminal on this product to establish proper grounding. Grounding work must be performed only by a qualified electrician.

Supply Power to Appliances

The device supports supplying power to appliances through its AC outlets or via an existing home circuit, allowing flexible connection.

Application 1: Appliances Connected to the Device's AC Outlets

Connect the appliance directly to the device's AC outlet. Power can come from solar energy, grid power, or the device's battery storage. The device provides backup power by automatically switching to battery power during a grid outage.

• To Connect an Appliance:
1. Plug your appliance into the AC outlet on the device.
2. Press the AC ON/OFF button once to enable the AC outlet.
• To Remove an Appliance:
1. Power off the connected appliance and disconnect it.
2. Press the AC ON/OFF button once to disable the AC outlet.

The backup power switch time varies (up to 3 seconds). Do not connect appliances requiring seamless power switching, as this device is not a UPS. The AC outlet remains enabled when grid power is connected. When off-grid and the outlet is not used for approximately 2 hours, it automatically disables. After 30 minutes of inactivity, the device shuts down to save battery.

Application 2: Appliances Connected to Other Home Outlets

Connect the appliance directly to another wall outlet in your home. When connected to the home circuit, the device automatically manages power distribution based on EcoFlow app settings. The maximum power supported is limited by available grid-feed power.

In this mode, during a grid power outage, the device will not automatically switch to battery power. You can manually connect appliances to the device's AC outlets.

Smart Control

EcoFlow App

App Introduction

EcoFlow offers a companion app for device management, allowing:

• All-in-one control of EcoFlow devices from anywhere.
• Monitoring of power consumption details with real-time updates.
• Personalization of energy schemes with customizable options.
• Prompt receipt of in-app troubleshooting and firmware updates.

App Download Methods

1. Scan the QR code to download.
2. Search for "EcoFlow" in the iOS or Android app store.
3. Visit https://download.ecoflow.com/app to download.

The EcoFlow app continuously adapts to enhance user experience. Screenshots are for demonstration only; actual appearance may vary. Users are encouraged to explore the app's functions.

Register and Log In

To Register an Account

1. Open the EcoFlow app and tap "Create new account".
2. Enter required registration information and tap "Sign up". Your email address will be used for your EcoFlow account.

To Log In

1. Open the EcoFlow app and tap "Log in".
2. Enter your registered email address and password to access the device management page.

Bind the Device and Set Up the Internet

When setting up a new device, bind it to your EcoFlow account for remote access to settings.

To Bind a New EcoFlow Device/System:

1. Open the EcoFlow app and log into your account.
2. Tap the "Add Device" button or "+" icon to search for new devices.
3. Select your EcoFlow device and follow on-screen instructions to complete device binding and Wi-Fi setup.

Access Device Management

Manage all bound devices via phone using the EcoFlow app. The product supports Wi-Fi and Bluetooth connections for convenient access to device settings.

• With Internet: When Wi-Fi is stable, access device settings via the internet. This is recommended for timely firmware updates and pushes.
• Without Internet: If Wi-Fi is unavailable, manage the device locally via Bluetooth, though some settings may be restricted.

For local control, you can only view the management page of each unit separately. Full system control requires internet access.

Explore More

Increase Available Power Source

The device's AC outlets support bidirectional power flow for charging and discharging. Adding an extra microinverter increases input capacity and improves charging efficiency.

• To Connect a Microinverter:
1. Prerequisite: Ensure your microinverter supports direct plug-in with a standard AC outlet and complies with local regulations. EcoFlow microinverters are preferred; third-party models may require additional measures.
2. After connecting the microinverter to solar panels, plug its AC output cable directly into the device's AC outlet.
3. Press the AC ON/OFF button once to enable the outlet.
• To Disconnect a Microinverter:
1. Press the AC ON/OFF button once to disable the outlet.
2. Unplug the microinverter's AC connection cable from the device's AC outlet.

EcoFlow recommends integrating only ONE microinverter with your STREAM system.

System Expansion

Multi-Room Distributed Configuration

This setup is allowed only if local electrical regulations permit direct plugging into a home socket.

This configuration allows STREAM devices to be installed in different rooms, offering flexible placement. Each device connects individually to an AC socket on the same power circuit, sharing battery resources. Synchronized power management and communication are enabled through the home circuit and WLAN.

• To Install a Distributed System:
1. Connect the EcoFlow STREAM AC Cable to a STREAM device's Grid Terminal to a home outlet and tighten the screw on the plug. STREAM devices power on automatically when connected to an active power source.
2. Connect additional STREAM devices separately in desired rooms.
3. Open the EcoFlow app to bind STREAM devices to your account. Ensure all devices are connected to the same Wi-Fi network.
• To Remove a Distributed System:
1. Power off connected appliances and disconnect them.
2. Disconnect all STREAM devices from the grid and any solar input. Powering off devices will not take effect if connected.
3. Press the power button for 2 seconds to turn off each device.
4. Move or store devices as needed.
5. Open the EcoFlow app and unbind devices from your account if necessary.

Notes:

• Keep the default protective cap on any unused terminal.
• Up to 6 STREAM devices can be installed in a system.

System Scheduling

The STREAM device supports a basic power scheduling scheme. Without a smart sensor, feed-in power cannot be adjusted in real-time based on household consumption; it can only be manually set to a fixed power or scheduled via the EcoFlow app. Smart sensor integration enhances scheduling capabilities.

Net Metering-Compatible Home Setup

In a net metering setup, excess solar energy is sent to the grid and offset against consumed electricity. When energy fed into the grid equals energy drawn, net energy usage becomes zero, meaning no additional electricity charges.

Non-Net Metering-Compatible Home Setup

In this setting, the smart meter measures only the load power on L2, and STREAM Ultra outputs power based on this measured value to reduce billing. You may choose either L1 or L2 depending on your setup. This is suitable for homes where net metering is not available. Check local utility rules for safe and compliant setup.

Whole-Home Scheduling with Smart Meter

A smart meter acts as a household sensor, measuring the difference between power drawn from the grid and power fed into it. The STREAM system uses this data to adjust feed-in power based on overall household load, ensuring efficient and balanced energy distribution across all connected STREAM devices.

• To Install a Smart Meter:

Have a qualified electrician install the smart meter in your home's distribution box. Ensure it is connected to the same Wi-Fi network and bound to the same EcoFlow account as the STREAM system.

• To Remove a Smart Meter:
1. Contact a qualified electrician to remove the smart meter.
2. Open the EcoFlow app and unbind the smart meter from the STREAM system if needed.

Compatible Meter Model: Shelly Pro 3EM. Only 1 smart meter is needed per STREAM system. Only 1 sensor should be added at a time.

Diagrams illustrate Smart Meter installation for Net and Non-Net Metering setups.

Storage and Maintenance

Routine Maintenance

For routine maintenance, follow these steps:

1. Use a soft, dry cloth to wipe the product shell and keep it clean.
2. Check all connection components every 6 months for good condition.
3. If the device is not used for an extended period, charge and discharge it every 3 months (fully charge, then discharge to 60% for storage) to maintain battery health. AC charging from the grid is recommended. In the EcoFlow app, set the backup reserve level to 100% for a full charge, then set it to 60% for storage discharge.

CAUTION! Battery Modules

This product contains battery modules. Observe the following precautions when working on batteries:

• Servicing should be performed or supervised by knowledgeable personnel.
• Do not dispose of batteries in fire; they may explode.
• Do not open or damage batteries; released electrolytes are harmful and toxic.
• Batteries can present a risk of electrical shock and high short-circuit current. Observe these precautions:
1. Remove watches, rings, or other metal objects.
2. Use tools with insulated handles.
3. Wear protective glasses, gloves, and boots.
4. Do not lay tools or metal parts on top of batteries.
5. Disconnect the charging source before connecting or disconnecting battery terminals.
6. Determine if the battery is inadvertently grounded. If so, remove the source from ground. Contact with a grounded battery can cause electric shock.

User-Replaceable Parts Maintenance

Product Removal

Before attempting any repairs, follow these steps to remove the device:

1. Disable the AC Outlets: Press the AC ON/OFF button once to turn off the outlets. Then disconnect appliances and microinverters.
2. Disconnect from Grid: Unscrew the plug, tighten it on the device's grid terminal, and rotate the locking ring counterclockwise to unplug the cable.
3. Disconnect from Solar: Use the solar wrench to disconnect solar cables from the PV terminal.
4. Detach the device (if applicable): Unscrew the device from mounting and locking brackets.
5. Disposal (Optional): If the device is non-functional, dispose of it according to local electrical equipment waste requirements.

DIY Front Case Replacement

Tool Requirements

• Slotted screwdriver (e.g., SL3) or other suitable tool.
• Protective gloves (optional).

Steps

1. Disconnect all cables and remove securing brackets (if applicable). Press and hold the power button for 2 seconds to power off, then place the device upside down vertically.
2. Use a screwdriver to pry clips outward to loosen them, then remove the front case.
3. Pull the front case downward to disengage it from slots, then remove the old front case.
4. Adjust the device's position so the front cover side faces upward. Slide the new front cover into the slots near the IoT module, aligning it with the 4 slots to secure it.

IoT Module Replacement

Prerequisites

Always contact EcoFlow technical support before attempting IoT module replacement. Perform steps only after receiving the replacement module.

Tool Requirements

• Slotted screwdriver (e.g., SL3) or other suitable tool.
• PH1 screwdriver.
• Anti-static gloves.

Steps

1. Disconnect all cables and remove securing brackets (if applicable). Press and hold the power button for 2 seconds to power off, then place the device upside down vertically.
2. Use a screwdriver to pry clips outward to loosen them, then remove the front case.
3. Locate the IoT module and use a PH1 screwdriver to remove its mounting screws (M3 specification).
4. Carefully lift the PCB to expose the power cable underneath. Press the white latch and pull out the cable.
5. Pull the signal cable directly from the PCB to fully remove the old IoT module.
6. Connect the power and signal cables to the new IoT module, placing them correctly (avoid pinching cables).
7. Reinstall the IoT protective cover and tighten screws.
8. Reinstall the front case of the device.

Long-term Storage

For long-term storage, restore the device to its original package in a dry, tidy place. Protect components from moisture, shocks, and vibrations. Store at temperatures between -40°C and +85°C, with 25°C being optimal.

Troubleshooting

The device's LED provides a basic indicator of operating status. Refer to in-app instructions for troubleshooting abnormal LED patterns.

If you cannot access the EcoFlow app, contact EcoFlow Customer Service. Do not attempt to repair the product without official instructions.

Safety Instructions and Regulatory Compliance

Disclaimer

Read the product documentation thoroughly and understand it before use. Improper use may cause injury, damage, or loss. Always refer to the most up-to-date documentation at https://www.ecoflow.com/support/download/, which takes precedence. By using this product, you agree to all terms and conditions. EcoFlow is not liable for losses from improper use or failure to adhere to instructions. EcoFlow reserves the right to final interpretation of this document and related product documents, subject to applicable laws and regulations.

Safety Symbols

The shell or nameplate includes safety symbols indicating potential hazards. Review these signs and their meanings.

Note: "This product" or "the device" refers to the EcoFlow STREAM Pro or EcoFlow STREAM Ultra.

• Caution: Disconnect from all voltage sources before servicing.
• Caution! Risk of Electric Shock: Do not disassemble; no user-serviceable parts. Refer servicing to qualified personnel.
• Caution! Hot Surface: Do not touch the enclosure during operation.
• Caution! Risk of Electric Shock: Wait at least 5 minutes after all voltage sources are disconnected before servicing.
• Reading Manual: Read the user manual and safety instructions carefully before installation, operation, and maintenance.
• CE Marking: Complies with essential requirements of relevant EU legislation.
• WEEE Directive: Do not dispose of as household waste. Follow local electronic waste disposal regulations.
• Grounding: Indicates the position for connecting the protective earthing (PE) cable.

Safety Instructions

1. Read this document and other related product documentation before operation.
2. Use this product strictly according to local electrical safety regulations and the applicable operating environment. Damage from causes unrelated to product quality or improper use (e.g., short circuits) is excluded from warranty.
3. An overcurrent circuit breaker/fuse must be installed between this product and the grid.
4. When the photovoltaic (PV) array is exposed to light, it supplies DC voltage to the power conversion equipment (PCE).
5. Use insulation tools and wear personal protective equipment when installing, servicing, or maintaining this product.
6. Install in a tidy, dry, and well-ventilated environment.
7. Keep out of reach of children and pets. Supervise children closely if the product is used near them.
8. Ensure the cable length for each PV connection is less than 3 meters.
9. Before making electrical connections, ensure any connected load is powered off.
10. Always pull the plug, not the cord, when disconnecting to reduce risk of damage.
11. Do not put fingers or hands into the product.
12. Do not expose to direct sunlight, rain, and snow.
13. Do not expose to strong electromagnetic fields to avoid radio interference.
14. Do not install or operate near flammable, explosive, corrosive, or caustic sources.
15. Do not install or operate during extreme weather events (lightning, heavy rain, strong wind).
16. Do not subject to severe impacts, vibrations, or drops to prevent physical damage.
17. Do not drag, squeeze, step on, or throw into fire, as there is a risk of explosion.
18. Do not use any damaged cords or cables.
19. Do not damage, deface, or remove any labels.
20. Do not disassemble, repair, or modify by yourself. Contact EcoFlow Customer Service for maintenance or service.
21. Do not use unofficial or unrecommended components and accessories. Contact EcoFlow for replacements.
22. Do not clean with flammable or toxic solvents; wipe with a dry soft cloth.
23. Do not place heavy objects (> 40 kg) on the product.
24. Device Removal: To safely remove, follow these steps:
1. Power off the connected load.
2. Disconnect cables from AC outlets.
3. Disconnect cable from the Grid terminal.
4. Disconnect cables from PV terminals.
5. Power off the product.
25. GROUNDING INSTRUCTIONS: This product must be grounded. Grounding provides a path of least resistance for electric current to reduce shock risk. EcoFlow provides a cord with an equipment grounding conductor/plug. Plug into a properly installed and grounded outlet per local codes. WARNING: Improper grounding can result in electric shock. Consult a qualified electrician if unsure about grounding or if the plug does not fit the outlet.
26. Personnel Requirement: Certain installation or servicing tasks must be performed exclusively by a qualified technician. Refer to product documentation for personnel requirements.
27. Floating Ground Notice: The grounding terminal is not connected to the AC neutral line. The internal electrical system remains isolated from the earth when the device is disconnected from grid power.
28. External Grounding Instructions: Supplemental grounding may be necessary at sites with inadequate grounding or specific local code requirements. Use the product's grounding terminal for proper grounding.

Regulatory Compliance

This marking indicates the product should not be disposed of with household waste in the EU. Recycle properly to prevent environmental damage or health risks. Return used products to an appropriate collection point or retailer for environmentally-sound recycling.

For information on disposal of electrical and electronic equipment, visit https://eu.ecoflow.com/pages/electronic-devices-disposal.

The Bluetooth® word mark and logos are registered trademarks of Bluetooth SIG, Inc. Use by EcoFlow Inc. is under license. Other trademarks are their respective owners.

Appendix

What's in the Box

• 1x EcoFlow STREAM Ultra
• nx EcoFlow STREAM Solar Panel Extension Cable (2.95m)
• 1x EcoFlow STREAM AC Cable (2m)
• 1x PV wrench
• 1x Mounting bracket
• 1x Locking bracket
• 4x M4*8 Screws
• 2x Expansion screws with anchors

The actual appearance of the AC cable may vary by sales region and product version.

If any item is damaged or missing, contact EcoFlow Customer Service for assistance.

Technical Specification

General Info

Battery Info

PV Terminal (DC)

Grid Terminal (AC)

AC Outlet (AC)

Parallel Terminal (AC)

Environment

Features

¹Test conditions: 0.5C/0.5C charge/discharge at 25°C (77°F). ²The performance may be derated at temperatures above 35°C.

Product Compatibility List

The compatibility list reflects supported models at publication. More ecosystem brands and models will be supported soon. For the latest updates, visit the official product website: https://www.ecoflow.com.

Copyright © 2025 EcoFlow. All Rights Reserved.