EcoFlow PowerStream Microinverter
User Manual V1.0
Disclaimer of Liability
Read this user manual carefully before using the product. Improper use may lead to serious injury or property damage. Your use of this product signifies agreement with its terms. EcoFlow is not liable for damages resulting from user non-compliance.
EcoFlow reserves the right to interpret and amend this document. Visit the official EcoFlow website for the latest information.
Compliance Markings:
- CE: EcoFlow Inc. declares the EcoFlow PowerStream microinverter complies with Directive 2014/53/EU. Full Declaration of Conformity available at: http://www.ecoflow.com/eu/eu-compliance, http://www.ecoflow.com/de/eu-compliance, http://www.ecoflow.com/fr/eu-compliance
- UKCA: EcoFlow Inc. declares the EcoFlow PowerStream microinverter complies with the Radio Equipment Regulations 2017. Full Declaration of Conformity available at: http://www.ecoflow.com/uk/eu-compliance
- WEEE Symbol: Crossed-out wheeled bin ?️ indicates that electrical and electronic equipment must not be disposed of as unsorted waste; it requires separate collection for recovery and recycling.
- Bluetooth®: The Bluetooth® word mark and logos are registered trademarks of Bluetooth SIG, Inc. EcoFlow Inc.'s use of these marks is under license.
Safety Information
General Safety:
- Read documentation before installation, operation, or maintenance.
- Do not place heavy objects on the equipment.
- Ensure all cables and connectors are dry and undamaged before connecting to prevent electric shock.
- Use insulated tools and wear personal protective equipment.
- Do not install or operate during extreme weather (lightning, snow, heavy rain, strong winds).
- Do not damage, soil, or remove warning labels.
- Avoid impact, pulling, crushing, or exposing the unit to fire due to explosion risk ?.
- Clean up installation debris.
- Do not modify or repair; contact support or qualified personnel.
- Use tools properly to prevent injury and damage.
- Understand the system components and functions. Ensure electrical connections, voltage, and frequency match local grid requirements.
- Tighten screws to specified torque (e.g., M5*12: 30 kgf*cm; ST5*12: 45 kgf*cm; M6*20: 90 kgf*cm).
- Ensure the grounding wire is securely connected (> 4 mm² cross-section).
- An automatic circuit breaker between the equipment and the grid is recommended.
- The unit may reach temperatures over 70°C (158°F); do not touch until cool. Keep away from children and pets ??.
- Install in an accessible location for connector removal.
- Disconnect AC (or battery) cable before removing the connector from the microinverter.
- Ensure the portable power station is OFF during connection.
Environmental Requirements:
- Install, operate, or store in a well-ventilated area.
- Do not install near flammable, explosive, corrosive, or humid sources.
- Avoid strong electromagnetic fields to prevent radio interference ?.
Symbol Explanations
Symbols in Documentation:
| Symbol | Meaning | Symbol | Meaning |
|---|---|---|---|
| ▲ DANGER | High-risk hazard; failure to avoid may result in death or serious injury. | ? | Indicates additional information for correct use or tips. |
| ▲ CAUTION | Low-risk hazard; failure to avoid may result in minor injury or device damage. | ? | Included in the basic package. |
| NOTICE | Important information requiring attention. | ? (with X) | Optional (not included). |
Symbols on Device:
- ▲ DANGER Do not damage, soil, or cover warning labels. Labels must be visible after installation.
| Symbol | Meaning | Symbol | Meaning |
|---|---|---|---|
| i | Refer to the instruction manual. | ⚡ | Caution, electrical hazard; energy storage with discharge timer. |
| ♨️ | Caution, hot surface. | ⏚ | Grounding connection point. |
| ⚠️ | Caution, hazard risk. | IP67 | Ingress Protection rating. |
Package Contents
Illustrations may differ from the actual product. Contact EcoFlow support for missing or defective components.
- A. Microinverter PowerStream (x1)
- B. Protective Cover (x1)
- C. BKW-Solar Cable (x1)
- D. Mounting Plate (x1)
- F. M5*40 Screw (x2)
- E. M5*12 Screw (x3)
- G. ST5.5*25 Screw (x2)
- H. M6*20 Screw (x2)
- I. M6 Nut (x2)
- J. Cable Puller (x1)
Component Usage:
- D, E, F, G: Used for wall mounting the microinverter. Refer to "Wall Mounting" section.
- D, F, H, I: Used for mounting the microinverter on a bracket. Refer to "Mounting on Bracket" section.
- J: Used for cable disconnection, located at the bottom of the protective cover. Refer to "Disconnecting Cables" section.
System Overview
The system diagram illustrates how solar panels connect to the EcoFlow PowerStream microinverter, which then connects to a portable power station and the electrical grid. A smart plug is also integrated for monitoring appliances.
| No. | Name | Description | Included in Basic Kit / Optional |
|---|---|---|---|
| 1 | Solar Panel | Up to two groups of solar panels can be connected per microinverter. | ❌ |
| 2 | Extension Cable | Used to extend the connection between the microinverter and solar panel. | ❌ |
| 3 | Flat Cable | Used for routing through windows or doors. | ❌ |
| 4 | BKW-Solar Cable | Used to connect the microinverter and solar panel. | ✔️ |
| 5 | Microinverter PowerStream | ✔️ | |
| 6 | Battery Connection Cable | Used to connect the microinverter to an EcoFlow portable power station. Types include BKW-DELTA EB, BKW-DELTA PRO, BKW-RIVER. | |
| 7 | EcoFlow Portable Power Station | Used for energy storage. | |
| 8 | BKW-AC Cable | Used to connect the microinverter to the mains. | ✔️ |
| 9 | EcoFlow Smart Plug | Used for monitoring appliance power and wireless communication with the microinverter for optimized energy consumption. | ❌ |
Additional accessories can be purchased on the official EcoFlow website.
Product Overview
The EcoFlow PowerStream microinverter features:
- 1. Antenna: For wireless communication.
- 2. PV-port: Input for solar panel connections.
- 3. Battery Port / DC Port: For connecting to a portable power station.
- 4. AC Output Port: For connecting to the mains or appliances.
Dimensions: 242 mm (width) x 169 mm (height) x 33 mm (depth).
LED Indication
| LED Indicator | Color | Status | Powering (AC Mode) | Connected to Meter (Smart Plug) | Detailed Explanation |
|---|---|---|---|---|---|
| Green | Blinking | AC input and AC output are active. Power is supplied to smart plug(s) for appliances. | ✔️ | AC input and AC output are active. Power is supplied to smart plug(s) for appliances. | |
| Solid | AC input and AC output are active, but power is not supplied to smart plug(s). | ❌ | |||
| White | Solid | PV input or power station is discharging (DC input), no AC output. | PV input or power station is discharging (DC input), no AC output. | ||
| Blinking | PV input and power station are charging (DC output), no AC output. | ||||
| Purple | Blinking | Firmware update in progress. | Firmware update in progress. | ||
| Blue | Blinking | Pairing with EcoFlow App. | Pairing with EcoFlow App. | ||
| Yellow | Solid | Warning. Refer to "Troubleshooting". | Refer to "Troubleshooting". | ||
| Red | Solid | Error. Refer to "Troubleshooting". | Refer to "Troubleshooting". |
Product Assembly
Pre-Assembly:
- This manual covers cable connection and microinverter mounting. Refer to solar panel and accessory instructions for panel installation.
- Perform assembly on a sunny day if testing the solar system.
- Choose Installation Location: Ensure the microinverter is within Wi-Fi range ?.
- Do not install where flammable or explosive materials are stored ?.
- The microinverter has an IP67 rating, suitable for indoor or outdoor installation. However, the EcoFlow portable power station is not waterproof; keep it indoors if used.
Assembly Procedure:
- Mount Microinverter on Portable Power Station: Place the microinverter onto the EcoFlow portable power station. (Refer to "Microinverter Mounting" section for details if needed).
- Connect Solar Panels: The BKW-Solar cable has two MC4 connector groups for connecting two groups of solar panels.
- After solar panels capture sunlight, they will supply DC power to the microinverter, indicated by a white LED.
- For series/parallel connections of multiple panels, refer to the "Connecting Multiple Solar Panels in Series or Parallel" section.
- If connecting an EcoFlow River series power station, it's recommended to connect solar panels to the power station first for energy accumulation. Refer to the power station's manual. Download manuals at: https://www.ecoflow.com/eu/support/download/
- Connect to Portable Power Station: Use the appropriate EcoFlow BKW cable (BKW-DELTA EB, BKW-DELTA PRO, BKW-RIVER) to connect the microinverter to compatible EcoFlow portable power stations. Ensure the power station is turned OFF during connection. Note: Using the BKW-RIVER cable with River series stations only discharges the station, it does not charge it.
- Connect to Mains: Ensure the AC outlet is powered ?. Use the BKW-AC cable to connect the microinverter to the mains.
- Turn on EcoFlow Portable Power Station: If your system includes a portable power station, turn it ON. (Skip if no power station is used).
After connection, the LED indicator will turn green when solar panels capture sunlight and the microinverter outputs AC power.
It is highly recommended to install the protective cover on the microinverter. The cover is included in the box.
Connecting Multiple Solar Panels in Series or Parallel
When connecting multiple solar panels in series or parallel, ensure the maximum operating voltage (Vm) and current (Im) of each group do not exceed the microinverter's input limits (55V voltage, 13A current). Panel Vm and Im must be compatible.
Series Connection: Connect panels sequentially using BKW-Solar cable (a), extension cable (b), and flat cable (c). Example: Vm (panel 1) + Vm (panel 2) < 55V.
Parallel Connection: Use BKW-Solar cable (a), extension cable (b), flat cable (c), and parallel connection cable (d) for connecting multiple panels in parallel groups. Example: Vm (panel 1) + Vm (panel 2) < 55V and Im (panel 1) + Im (panel 2) < 13A.
Microinverter Mounting
If your system does not include a portable power station, you can mount the microinverter.
Wall Mounting:
- Use the mounting plate to mark and drill two holes approximately 41mm deep in the wall. Insert M5*40 screws into the holes. (Drill bit: 8mm, not included).
- Install M5*12 screws into the designated locations on the back of the microinverter.
- Insert ST5.5*25 screws through the plate holes into the M5*40 screws.
Mounting on Bracket:
- Install M3*6 screws into the designated locations on the back of the microinverter.
- Install two M6*20 screws through the mounting plate holes and tighten with M6 nuts. Ensure installation is vertical or within 15° for stability and safety.
Grounding Considerations:
The included BKW-AC cable has a grounding wire. If additional grounding is needed, use an M4*6 screw, a grounding wire (> 4 mm²), and appropriate tools. Find the grounding terminal on the bottom of the microinverter and secure the screw.
EcoFlow App
Control, monitor, and configure your EcoFlow PowerStream remotely using the EcoFlow App. Download from: https://download.ecoflow.com/app
Privacy Policy: By using EcoFlow products, you agree to the Terms of Use and Privacy Policy, available in the "About Us" section of the app or on the EcoFlow website: https://ecoflow.com/pages/terms-of-use and https://ecoflow.com/pages/privacy-policy.
App Download: Available on Google Play and the App Store.
PowerStream System Page:
- Tap to access system settings.
- View cumulative generation and energy savings. Navigate previous data by day, week, month, or year.
- Monitor real-time energy production, storage, and supply.
- View the number of smart plugs in the system.
Power Mode Settings:
This function requires a connected portable power station. Access via "System Settings" > "Power Mode".
- Prioritize Power Supply: Supplies power to appliances first. The power station charges when supply exceeds demand and discharges when demand exceeds supply.
- Prioritize Energy Storage: Charges the power station to its limit first. The power station does not discharge in this mode.
System Output Power Settings:
Access via "System Settings" > "System Output Power". Set the continuous output power of the microinverter to establish the total system output power (Microinverter Output + Smart Plug Power).
Firmware Update:
Update firmware via "System Settings" > "Firmware" on the PowerStream system page or on the microinverter's "Settings" page.
Your Microinverter Page:
- View cumulative generation and energy savings.
- Monitor real-time energy production, storage, and supply.
Disconnecting Cables
▲ DANGER Do not pull the plug by hand. Use the included cable puller. Remove the protective cover before pulling the plug if installed.
Cable Puller Location: The cable puller is included in the package.
▲ CAUTION Before disconnecting the battery connection cable, turn OFF the power station.
Disconnect Connectors in Order:
- Before removing the AC (or battery) plug from the microinverter, disconnect the cable from the AC outlet (or battery).
Troubleshooting
If the LED indicator turns yellow or red, it indicates a warning or error. Refer to the app or the table below for solutions. Contact support if the issue persists.
▲ DANGER Do not attempt to repair the microinverter yourself.
Technical Specifications
| Parameter | Value |
|---|---|
| General Information | |
| Model | EFWN511/EFWN511B |
| Dimensions | 242x169x33 mm |
| Weight | Approx. 3 kg |
| PV Port | |
| Operating Voltage | 11 - 55 V DC |
| Max. Input Voltage | 55 V DC |
| Max. Input Current | 13 A |
| Startup Input Voltage | 15 V DC |
| Reverse Connection Protection | Supported |
| Overvoltage Protection | D |
| Max. PV Short Circuit Current (Isc PV) | 14 A |
| Max. Inverter Backfeed Current | 0 A |
| BAT / DC Port | |
| Discharge Mode | |
| Max. Input Current | 13 A |
| Input Voltage | 11-15 V DC, 40-59 V DC |
| Max. Input Voltage | 59 V DC |
| Charging Mode | |
| Charging Voltage | 30 - 58 V DC |
| Max. Charging Current | 13 A |
| Nominal Charging Voltage | 48 V DC |
| Overvoltage Protection | D |
| Nominal Input Short Circuit Current | 20 A |
| AC Port | |
| Output Voltage | 220/230/240 V AC |
| Output Frequency | 50 Hz |
| Output Power Factor | ±0.8~1 |
| Max. Output Current | 3.6 A |
| Max. Output Short Circuit Current | 18.4 A |
| Max. Output Overcurrent Protection | 4 A |
| Total Harmonic Distortion (THDI) | <=3%@100% load |
| Overvoltage Protection | III |
| Other | |
| Placement | Indoor or Outdoor |
| Pollution Degree | PD3 |
| Ingress Protection Rating | IP67 |
| Operating Temperature | -40 °C to 50 °C |
| Humidity | 0% to 100% |
| Altitude | <2000 m |
| Wet Location | Yes |
| Inverter Type | Isolated |
| Protection Class | 1 |
| Wi-Fi (2.4G) | Frequency Range: 20M: 2412 - 2472 MHz / 40M: 2422-2462 MHz; Max. Output Power: < 20 dBm |
| Bluetooth® | Frequency Range: 2402-2480 MHz; Max. Output Power: < 20 dBm |
For updated parameters, please visit our website to download the latest version of the user manual.
