EcoFlow PowerStream Microinverter
USER MANUAL V1.0
EcoFlow PowerStream Microinverter
Disclaimer
Read this user manual carefully before using the product to ensure that you completely understand the product and can correctly use it. After reading this user manual, keep it properly for future reference. Improper use of this product may cause serious injury to yourself or others, or cause product damage and property loss. Once you use this product, it is deemed that you understand, approve and accept all the terms and content in this document. EcoFlow is not liable for any loss caused by the user's failure to use this product in compliance with this user manual.
In compliance with laws and regulations, EcoFlow reserves the right to final interpretation of this document and all documents related to this product. This document is subject to changes (updates, revisions, or termination) without prior notice. Please visit EcoFlow's official website to obtain the latest product information.
Hereby, EcoFlow Inc. declares that EcoFlow PowerStream Microinverter is in compliance with Directive 2014/53/EU. The full text of the EU declaration of conformity is available at the following internet addresses: http://www.ecoflow.com/eu/eu-compliance, http://www.ecoflow.com/de/eu-compliance, http://www.ecoflow.com/fr/eu-compliance.
Hereby, EcoFlow Inc. declares that EcoFlow PowerStream Microinverter is in compliance with Radio Equipment Regulations 2017. The full text of the UKCA declaration of conformity is available at the following internet address: http://www.ecoflow.com/uk/eu-compliance.
The crossed-out wheeled bin ♻️ indicates that the electrical and electronic (EE) product should not be discarded as unsorted waste but must be sent to separate collection facilities for recovery and recycling.
The Bluetooth® word mark and logos are registered trademarks owned by Bluetooth SIG, Inc. and any use of such marks by EcoFlow Inc. is under license. Other trademarks and trade names are those of their respective owners.
Safety Instruction
General safety
- Please carefully read the documents before installing, operating or maintaining the equipment. The documents are subject to change due to product updates or other reasons.
- Do not put heavy objects on the equipment.
- Ensure that all cables and connectors are intact and dry before connecting to prevent electric shocks.
- Use insulation tools or wear personal protective equipment when you install or operate the equipment.
- Do not install or operate the equipment in extreme weather events such as lightning, snow, heavy rain, strong wind and so on.
- Do not damage, smear or rip off any warning labels on the equipment.
- Do not hit, pull, drag, squeeze or step on the equipment, or throw it into the fire, as there is risk of explosion.
- After installing, please clean the remains of the installation, such as boxes, clipped cable ties, ripped insulation materials, etc.
- Do not modify or repair the equipment; please contact customer service or qualified personnel if necessary.
- Use tools and the equipment correctly to prevent personal injuries and product damage.
- Understand the components and function of the grid-tied PV power system. Make sure that all electrical connections, and voltage and frequency at the connection point meet the local microinverter grid-tie requirements.
- Make sure the screws are tightened to the specified torque during installation (M5*12: 30 Kgf*cm; ST5*12: 45 Kgf*cm; M6*20: 90 Kgf*cm).
- If you only connect solar panels and the battery with the microinverter without plugging into the AC outlet, the microinverter shall be grounded.
- It is strongly recommended to install an overcurrent circuit breaker between the equipment and the grid.
- The equipment may get more than 70 °C (158 °F) while in use. Do not touch its enclosure before it cools down. Also, always keep the equipment out of reach of children and pets.
- The installation location should be convenient for you to pull out the connectors.
- Before you pull out the AC (or battery) connector from the microinverter, disconnect the cable from the AC socket (or battery's) end.
- Make sure the portable power station is off during the whole connection process.
- You can only connect solar panels to the PV port and only connect an EcoFlow portable power station to the battery port.
Environment requirements
- Make sure the equipment is installed, operated or stored in a well-ventilated place.
- Do not install or operate the equipment near flammable, explosive, corrosive, caustic or moist sources.
- Do not expose the equipment to strong electromagnetic fields to avoid radio interference.
Explanation of Symbols
Symbols on the documentation
| Symbol | Explanation | Symbol | Explanation |
|---|---|---|---|
| DANGER | A hazard with a high level of risk which, if not avoided, will result in death or serious injury. | ? | Indicates additional information on correct use or useful tips. |
| CAUTION | A hazard with a low level of risk which, if not avoided, will result in minor injury, or damage to the device. | ? | In a basic set |
| NOTICE | Important information that you need to pay attention to. | ? | Optional (not in the box) |
Symbols on the device
DANGER • Do not damage, smear or cover any warning labels on the device. All labels must be visible after installation.
| Symbol | Explanation | Symbol | Explanation |
|---|---|---|---|
| ? | Refer to the operation instructions | ⚡ | Caution, risk of electric shock; energy storage timed discharge |
| ? | Caution, hot surface | ⏚ | The position for connecting the protection ground cable |
| ⚠️ | Caution, risk of danger | IP67 | Ingress Protection rating |
What's in the Box
A PowerStream Microinverter
B Protective case
C BKW-Solar cable
D Installation board
E M5*12
F M5*40
G ST5.5*25
H M6*20
I M6 nut
J Cable puller
Components used for mounting the microinverter on the wall: D, E, F, G.
Components used for mounting the microinverter on the bracket: D, F, H, I.
Component used for disconnection: J, located at the bottom of the protective case.
Note: The images of the product and components may differ from the actual product. If there are missing or defective components, please contact EcoFlow customer service.
Overview
System overview
The system overview diagram shows solar panels connected via cables to the EcoFlow PowerStream Microinverter, which is then connected to a portable power station and the home's power grid via AC cables. It illustrates the flow of energy from solar panels to the microinverter, then to either the power station or the grid. The diagram also shows optional components like an extension cable and a smart plug.
| No. | Name | Description | In a basic set / Optional (not in the box) |
|---|---|---|---|
| 1 | Solar panel | Up to two groups of solar panels can be connected to one microinverter. | ❌ |
| 2 | Extension cable | Used for extending the connection between the microinverter and the solar panel. | ❌ |
| 3 | EcoFlow Super Flat Cable | Used for passing through a window or a door. | ❌ |
| 4 | EcoFlow BKW-Solar Cable | Used for the connection between the microinverter and the solar panel. | ✔️ |
| 5 | PowerStream Microinverter | / | ✔️ |
| 6 | Battery connection cable | Used for the connection between the microinverter and the EcoFlow portable power station. Three types: BKW-DELTA EB cable, BKW-DELTA PRO cable, BKW-RIVER cable. | ❌ |
| 7 | EcoFlow portable power station | Used for power storage. | ❌ |
| 8 | EcoFlow BKW-AC cable | Used for connection of the microinverter to the power grid. | ✔️ |
| 9 | EcoFlow Smart Plug | Used for monitoring the power of appliances and for wireless communication with the microinverter to optimize the energy usage. | ❌ |
Note: You can purchase optional accessories from the official EcoFlow website.
Product overview
The EcoFlow PowerStream Microinverter is a compact device with several ports and indicators. It features:
- 1 Antenna: Works with the EcoFlow app and Smart Plugs for wireless communication.
- 2 PV port: Connects with solar panels.
- 3 Battery port / DC port: Connects with an EcoFlow portable power station.
- 4 AC output port: Connects to the power grid.
Dimensions: 242 mm (width) x 169 mm (height).
LED indication
The LED indicator on the microinverter provides status information:
| LED indicator | Color | Status | Feeding electricity (power grid) | Feeding electricity (Smart Plug) | Detailed explanation |
|---|---|---|---|---|---|
| ---- | Green | Breathing | ✔️ | ✔️ | There is power input and AC output. Electricity is fed to Smart Plug(s) for use by appliances. |
| ---- | Green | Solid | ✔️ | ❌ | There is power input and AC output, but no electricity is fed to Smart Plug(s). |
| ---- | White | Solid | Power on | There is PV input or/and the power station discharges (DC input), without any power output. | |
| ---- | White | Breathing | Charging | There is PV input and the power station is charged (DC output), without AC out. | |
| ---- | Purple | Blinking | Updating | Updating the firmware. | |
| ---- | Blue | Blinking | Pairing | Pairing with EcoFlow app. | |
| ---- | Yellow | Solid | Warning | See "Troubleshooting" for details. | |
| ---- | Red | Solid | Error | See "Troubleshooting" for details. |
Assembly
Pre-assembly
Select a location for the PowerStream Microinverter
Make sure that the microinverter is within the Wi-Fi coverage.
- Valid location: Indicates sufficient Wi-Fi signal (2.4G).
- Invalid location: Indicates poor or no Wi-Fi signal.
Do not place or install the microinverter in an area where flammable or explosive materials are stored.
- Valid location: Safe area, no flammable materials.
- Invalid location: Area with flammable or explosive materials.
The IP rating of the microinverter is IP 67, meaning it can be installed either indoors or outdoors. However, the EcoFlow portable power station is not waterproof. If your system includes a portable power station, keep both of them indoors.
Measure the distance
The diagram shows the typical cable lengths for connecting solar panels, the microinverter, and the power grid:
- Extension cable: 3m
- Super flat cable: 0.5m
- BKW-Solar cable: 2m
- BKW-AC cable: 1.5m/3m/5m
- Battery connection cable: 0.4m/0.5m/1m
Note: Cable lengths may vary by country or region. Except for the standard BKW-Solar cable and BKW-AC cable, other cables may need to be purchased separately from the official website.
Assembly procedure
1. Place the microinverter on the EcoFlow portable power station.
If you need to mount the microinverter, refer to "Mounting the Microinverter".
2. Connect with solar panels.
The diagram shows two solar panels (400W each) connected in parallel to the microinverter using BKW-Solar cable (a), extension cables (b), and super flat cables (c). The connection forms two groups, Group 1 and Group 2, each connected to a PV port on the microinverter.
Explanation:
- After the solar panels capture solar radiation, they provide direct current to the microinverter. The LED indicator will light up white.
- For connecting multiple solar panels in series or parallel within a group, refer to the section "Connecting several solar panels in series or in parallel".
- If connecting an EcoFlow River-series portable power station to the DC port of the microinverter, it is recommended to connect solar panels to the power station directly to ensure energy storage. Refer to the power station's user manual for connection details.
3. Connect with the EcoFlow portable power station.
There are three types of battery connection cables for different EcoFlow portable power stations:
- Delta 2 series and Delta Max series: Use the BKW-DELTA EB cable.
- Delta Pro series: Use the BKW-DELTA PRO cable.
- River series, Delta mini, and Delta 1300: Use the BKW-RIVER cable.
The diagrams illustrate how to connect each type of power station using the corresponding cable to the battery/DC port of the microinverter.
4. Connect to the power grid.
The diagram shows the BKW-AC cable connecting the AC output port of the microinverter to a wall AC socket.
5. Turn on the EcoFlow portable power station.
The diagram shows a finger pressing the power button (ON) on the portable power station.
After completing the connection, the LED indicator will light up green when the solar panel captures solar radiation and the microinverter outputs AC. It is highly recommended to install the protective case on the top of the microinverter to protect you from high temperature burns. The protective case is included in the box.
Connecting several solar panels in series or in parallel
Solar panels in series
The diagram shows four solar panels connected in series. Solar panel 1 is connected to Solar panel 2 via cable (b), and Solar panel 3 is connected to Solar panel 4 via cable (b). The series groups are then connected to the microinverter using BKW-Solar cable (a) and super flat cables (c). The voltage limits are indicated: Vm (solar panel 1) + Vm (solar panel 2) < 55V and Vm (solar panel 3) + Vm (solar panel 4) < 55V.
Solar panels in both series and parallel
The diagram shows a configuration with eight solar panels. Four panels (1-4) are arranged in two series strings (1-2 and 3-4), and another four panels (5-8) are arranged similarly (5-6 and 7-8). Each series string is then connected in parallel to the microinverter. Solar parallel connection cables (d) are used to connect the series strings in parallel. The connection to the microinverter uses BKW-Solar cable (a), extension cables (b), and super flat cables (c). The voltage and current limits are indicated: Vm (solar panel 1) + Vm (solar panel 3) < 55V and Im (solar panel 1) + Im (solar panel 2) < 13A.
Mounting the microinverter
If your balcony solar system does not include a power station, you can mount the microinverter.
Mount on the wall
- Use the installation board to locate the hole and drill two holes about 41 mm deep in the wall. Then, insert M5*40 screws into the holes. A drill bit of 8mm (0.31in.) is recommended (not provided).
- Install M5*12 screws in the corresponding positions on the back of the microinverter. The diagram shows the microinverter being attached to the installation board using these screws.
- Insert ST5.5*25 screws through the holes of the board into the M5*40 screws already in the wall. The diagram shows a cordless electric screwdriver being used for this step.
Mount on the bracket
- Install M3*6 screws in the corresponding positions on the back of the microinverter. The diagram shows the microinverter being attached to a bracket using these screws.
- Install two M6*20 screws into two holes of the installation board, and tighten M6 nuts on them.
Grounding considerations
There is an earth wire inside the supplied BKW-AC cable, allowing grounding to be done directly using this cable. If you need to add an additional grounding conductor, you will need an M4*6 screw, a grounding wire (cross-section ≥ 4 mm²) with a connection tool, safety gloves, and a drill (not provided).
- Find the grounding terminal on the bottom of the microinverter.
- Insert the M4*6 screw into the grounding terminal through the connection tool of the grounding cable.
EcoFlow App
Control, monitor, and customize your EcoFlow PowerStream microinverter from afar with the EcoFlow app. Download the app at: https://download.ecoflow.com/app
Privacy policy
By using EcoFlow Products, Applications, and Services, you consent to the EcoFlow Term of Use and Privacy Policy, which you can access via the “About” section of the “User” page on the EcoFlow App or on the official EcoFlow website at https://www.ecoflow.com/policy/terms-of-use and https://www.ecoflow.com/policy/privacy-policy.
The app interface displays:
- QR codes for downloading the app on Google Play and the App Store.
- Page of your PowerStream balcony solar system: This screen shows the system name, total revenue, total generation, current generation, battery status, and details about solar panels, smart plugs, and other loads. It allows navigation to settings, viewing historical data, and checking real-time power generation, storage, and supply.
Setting the power supply mode
On the system page, tap to access "Power supply mode" and select your preferred mode:
- Prioritize power supply: This mode prioritizes powering appliances. If supply exceeds demand, the power station charges. If demand exceeds supply, the power station discharges.
- Prioritize power storage: This mode prioritizes charging the portable power station until it reaches its charging limit. The power station will not discharge to the microinverter in this mode.
Setting the AC output power demand
On the system page, tap to access "AC output power demand". The AC output power demand is calculated as: Power demand from other loads + Load power of smart plugs.
Firmware update
On the PowerStream system page, navigate to > "Firmware" to check and update the firmware for the microinverter and smart plug. The microinverter can also be updated via its "Setting" page.
Page of your microinverter
In the list of devices, tap the microinverter to view its details. This page shows the microinverter's name, affiliated system, total revenue, total generation, current generation, battery status, and details for other loads and smart plugs. It provides access to settings, affiliated systems, historical data, and real-time power information.
Unplug the Cables
Where is the cable puller?
The cable puller is a small tool designed to help disconnect cables. It is typically stored with or near the protective case.
How to use the cable puller?
The diagram illustrates the process: the cable puller is placed over the connector, and then used to safely disengage it from the port.
Remove connectors in the following order:
The diagram shows a numbered sequence for disconnecting cables: 1. AC socket connection, 2. Microinverter AC port connection, 3. Microinverter battery/DC port connection.
Troubleshooting
If the LED indicator turns yellow or red, indicating a warning or error, follow the instructions in the app or the table below. If the issue persists, contact customer service.
| Error code | LED indicator | Name | Suggestion |
|---|---|---|---|
| 1 | Red | Device error | 1. Unplug all cables connected to the PowerStream. 2. Wait for 30 seconds, and then plug in all the cables. 3. If the issue persists, contact customer service. |
| 2 | Red | Device error | 1. Unplug all cables connected to the PowerStream. 2. Wait for 30 seconds, and then plug in all the cables. 3. If the issue persists, contact customer service. |
| 4 | Red | Device error | 1. Unplug all cables connected to the PowerStream. 2. Wait for 30 seconds, and then plug in all the cables. 3. If the issue persists, contact customer service. |
| 8 | (Displayed in app) | Grid error | 1. Try pulling out the AC cable and inserting it back again. Make sure that the plug is securely inserted. 2. If the issue persists, the power grid is probably faulty. Wait for the power grid to recover. 3. If the issue persists for more than 1 hour, contact customer service. |
| 16 | (Displayed in app) | Grid error | 1. Try pulling out the AC cable and inserting it back again. Make sure that the plug is securely inserted. 2. If the issue persists, the power grid is probably faulty. Wait for the power grid to recover. 3. If the issue persists for more than 1 hour, contact customer service. |
| 32 | (Displayed in app) | Grid error | 1. Try pulling out the AC cable and inserting it back again. Make sure that the plug is securely inserted. 2. If the issue persists, the power grid is probably faulty. Wait for the power grid to recover. 3. If the issue persists for more than 1 hour, contact customer service. |
| 64 | (Displayed in app) | Grid error | 1. Try pulling out the AC cable and inserting it back again. Make sure that the plug is securely inserted. 2. If the issue persists, the power grid is probably faulty. Wait for the power grid to recover. 3. If the issue persists for more than 1 hour, contact customer service. |
| 128 | (Displayed in app) | Grid error | 1. Try pulling out the AC cable and inserting it back again. Make sure that the plug is securely inserted. 2. If the issue persists, the power grid is probably faulty. Wait for the power grid to recover. 3. If the issue persists for more than 1 hour, contact customer service. |
| 256 | Red | Device error | 1. Unplug all cables connected to the PowerStream. 2. Wait for 30 seconds, and then plug in all the cables. 3. If the issue persists, contact customer service. |
| 512 | Red | Device error | 1. Unplug all cables connected to the PowerStream. 2. Wait for 30 seconds, and then plug in all the cables. 3. If the issue persists, contact customer service. |
| 1024 | Red | Device error | 1. Unplug all cables connected to the PowerStream. 2. Wait for 30 seconds, and then plug in all the cables. 3. If the issue persists, contact customer service. |
| 4096 | (Displayed in app) | Disconnected from grid | 1. Try pulling out the AC cable and inserting it back again. Make sure that the plug is securely inserted. 2. If the issue persists, the power grid is probably faulty. Wait for the power grid to recover. 3. If the issue persists for more than 1 hour, contact customer service. |
| 16384 | Red | Device error | 1. Unplug all cables connected to the PowerStream. 2. Wait for 30 seconds, and then plug in all the cables. 3. If the issue persists, contact customer service. |
| 4 | Yellow | Incorrect wiring of the solar panel | Make sure the solar panel is correctly wired. If the issue persists, contact customer service. |
| 8 | Yellow | Incorrect wiring of the solar panel | Make sure the solar panel is correctly wired. If the issue persists, contact customer service. |
| 16 | Yellow | Device temperature too high | Keep the ambient temperature within the range of -40 °C to 50 °C. If the issue persists, contact customer service. |
| 32 | Yellow | Temperature too low | Keep the ambient temperature within the range of -40 °C to 50 °C. If the issue persists, contact customer service. |
| 64 | Red | Overvoltage at the solar panel | Check if the open-circuit voltage of the solar panel is between 11V and 55V. |
| 16 | Yellow | Temperature too high | Keep the ambient temperature within the range of -40 °C to 50 °C. If the issue persists, contact customer service. |
| 4 | Yellow | Battery level of the power station is too high | Discharge electricity from the power station until the battery level drops to 90%. |
| 16 | Yellow | Abnormal voltage at the DC port | Make sure the voltage at the DC port falls within the range of 11V to 15V or 40V to 59V. |
| 32 | Yellow | Abnormal voltage at the DC port | Make sure the voltage at the DC port falls within the range of 11V to 15V or 40V to 59V. |
| 8 | Yellow | Temperature too high | Keep the ambient temperature within the range of -40 °C to 50 °C. If the issue persists, contact customer service. |
| 16 | Yellow | Temperature too low | Keep the ambient temperature within the range of -40 °C to 50 °C. If the issue persists, contact customer service. |
Specifications
General info
| Model | EFWN511/EFWN511B |
|---|---|
| Dimension | 242×169×33 (mm) |
| Weight | Approximately 3 kg |
PV port
| Operating voltage | 11 - 55 Vd.c. |
|---|---|
| Maximum input voltage | 55 Vd.c. |
| Maximum input current | 13 A |
| Initial input voltage | 15 Vd.c. |
| Anti-reverse connection protection | Supported |
| Overvoltage | II |
| Max. PV short circuit current (Isc PV) | 14 A |
| Max. inverter backfeed current to the array | 0 A |
BAT / DC port
| Discharging mode | |
|---|---|
| Maximum input current | 13 A |
| Input voltage | 11 - 15 Vd.c., 40 - 59 Vd.c. |
| Maximum input voltage | 59 Vd.c. |
| Charging mode | |
| Charging voltage | 30 - 58 Vd.c. |
| Maximum charging current | 13 A |
| Rated charging voltage | 48 Vd.c. |
| Overvoltage | II |
| Battery input short circuit current rating | 20 A |
AC port
| Output voltage | 220/230/240 Va.c. |
|---|---|
| Output frequency | 50 Hz |
| Output power factor | ±0.8 ~ 1 |
| Maximum output current | EFWN511: 3.7 A EFWN511B: 2.8 A |
| Maximum output fault current | 18.4 A |
| Maximum output overcurrent protection | 4 A |
| THDI | <=3%@100% load |
| Overvoltage | II |
Others
| Placed | Indoors or outdoors |
|---|---|
| Pollution degree | PD3 |
| Ingress Protection rating | IP67 |
| Operating temperature | -40 °C to 50 °C (-40 °F to 122 °F) |
| Humidity | 0 % to 100 % |
| Altitude | ≤2000 m |
| Wet location | Yes |
| Type of inverter | Isolated |
| Protective class | 1 |
| Wi-Fi (2.4G) | Frequency range: 20M: 2412 - 2472 MHz / 40M: 2422- 2462 MHz Maximum output power: ≤ 20 dBm |
| Bluetooth® | Frequency range: 2402-2480MHz Maximum output power: ≤ 20 dBm |
For updated parameters, please go to our website to download the latest user manual.
