1. Introduction
The flex-energie Balcony Power Plant Complete Set is designed to help you generate your own green electricity and reduce your annual energy costs. This comprehensive kit includes a high-performance 450Wp solar module, an efficient Envertech EVT400-B inverter, and a 5-meter connection cable, providing an optimal solution for energy generation in private households.
This manual provides essential information for the safe and efficient installation, operation, and maintenance of your balcony power plant.

Image: Overview of the flex-energie Balcony Power Plant Complete Set, showing the solar panel, inverter, connection cable, and a smartphone displaying the monitoring app.
2. What's in the Box
Your flex-energie Balcony Power Plant Complete Set includes the following components:
- 1x 450Wp JA Solar Bifacial Solar Module (JAM54D40 450LB)
- 1x Envertech EVT400-B Micro Inverter
- 1x 5m Connection Cable with Schuko Plug

Image: Diagram illustrating the included components: one 450Wp solar module, one Envertech EVT400-B inverter, and one 5m Schuko connection cable, along with the WiFi app icon.
3. Setup and Installation
The flex-energie Balcony Power Plant is designed for quick and straightforward installation. Follow these steps for a successful setup:
- Choose a Suitable Location: Select an optimal location for your solar module, such as a balcony, terrace, or roof. Ensure the area receives maximum sunlight throughout the day and is free from significant shading.
- Mount the Solar Module: Securely attach the solar module to your chosen location. While this kit does not include mounting hardware, various accessories are available separately to suit different installation needs.
- Connect to the Power Grid: Connect the inverter to the solar module, then use the provided 5m cable with the Schuko plug to connect the system to a standard household power socket. The system is designed for plug-and-play operation.
- Activate and Monitor: Once connected, the system will begin generating electricity. For detailed monitoring of your energy production and savings, download and configure the associated WiFi app.
Note: For optimal performance, ensure the solar module is angled correctly towards the sun. Even on cloudy days, the N-Type technology of the solar module helps maximize energy gain.

Image: Visual guide showing three steps for simple assembly: 1. Attach to a suitable location, 2. Connect to the power grid via a socket, 3. Utilize self-generated electricity.
4. Operating the System
Your flex-energie Balcony Power Plant operates automatically once connected to the grid and exposed to sunlight. The Envertech EVT400-B inverter converts the direct current (DC) from the solar module into alternating current (AC) suitable for household use.
Monitoring with the WiFi App
The system features a WiFi function for performance monitoring. Download the dedicated app for your PC, smartphone, or tablet to observe your energy production and savings in real-time. This allows you to track how much electricity is being generated and how much CO2 is being avoided.
- Real-time Data: View current power output and historical data.
- Savings Tracking: Monitor your electricity cost savings.
- CO2 Reduction: See your contribution to environmental protection.
Important Note: The inverter's WiFi function typically requires sufficient sunlight to operate. If you are attempting to set up the WiFi connection during dusk or low light conditions, it may not connect immediately. Ensure adequate light for initial setup.

Image: Promotional image highlighting "Your Own Green Power" with a smartphone displaying the monitoring app, showing real-time energy production and savings. It also depicts a couple looking out at solar panels, emphasizing home use.
5. Maintenance
Regular maintenance ensures the longevity and optimal performance of your balcony power plant. While the system requires minimal upkeep, consider the following:
- Cleaning the Solar Module: Periodically clean the surface of the solar module to remove dust, dirt, leaves, or other debris that may accumulate and reduce efficiency. Use a soft cloth and water; avoid abrasive cleaners.
- Visual Inspection: Regularly inspect the solar module, inverter, and cables for any visible damage, loose connections, or signs of wear.
- Shading Management: Be aware that even partial shading (e.g., from passing people, trees, or nearby structures) can significantly reduce the power output of your solar module. Optimize placement to minimize shading throughout the day.
6. Troubleshooting
If you encounter issues with your flex-energie Balcony Power Plant, consider the following common troubleshooting steps:
- No Power Output:
- Ensure the solar module is receiving sufficient sunlight.
- Check all cable connections between the solar module, inverter, and the power socket. Ensure they are secure.
- Verify that the power socket is functional.
- App Connectivity Issues:
- Ensure the inverter is receiving enough sunlight for its WiFi module to power on. Try connecting during peak daylight hours.
- Check your home WiFi network and ensure the signal strength is adequate at the inverter's location.
- Restart your router and the inverter (by unplugging and replugging the AC cable) to refresh the connection.
- Ensure your smartphone or device is compatible with the app and that the app is updated to the latest version.
- Reduced Power Output:
- Check for any new shading sources (e.g., growing trees, new constructions) that might be affecting the solar module.
- Clean the surface of the solar module from dirt or debris.
- Verify that the inverter is operating correctly and not displaying any error indicators.
If these steps do not resolve the issue, please contact flex-energie customer support for further assistance.
7. Specifications
Key technical specifications for the flex-energie Balcony Power Plant Complete Set:
| Component | Specification |
|---|---|
| Solar Module | JA Solar JAM54D40 450LB |
| Power Output (Solar Module) | 450 Wp |
| Module Type | Bifacial (double-sided sunlight absorption), N-Type (more power in bad weather) |
| Dimensions (Solar Module) | 1762 x 1134 x 30 mm |
| Weight (Solar Module) | 22 kg |
| Inverter | Envertech EVT400-B |
| Output Power (Inverter) | 400W (Configurable) |
| Protection Class | IP67 Enclosure |
| Features | WiFi Function for performance monitoring, VDE-AR-N 4105 compliant |
| General | |
| Model Number | feBKW1MK5 |
| Power Source | Solar Powered |
| Country of Origin | China |

Image: Infographic detailing the specifications of the Envertech EVT400-B inverter (400W output, IP67, WiFi, VDE-AR-N 4105 compliant) and the JaSolar JAM54D40 solar module (450Wp, Bifacial, N-Type, dimensions, weight).
8. Warranty and Support
flex-energie is committed to providing high-quality products and excellent customer service. We stand for quality and reliability, backed by 10 years of experience in solar energy solutions.
Customer Support
Should you have any questions or require assistance, our expert support team is available to help you before, during, and after your purchase. We offer specialized support from Germany and Austria to ensure you receive prompt and knowledgeable assistance.
For support inquiries, please refer to the contact information provided with your product documentation or visit the official flex-energie website.

Image: Infographic highlighting flex-energie's expertise from Germany, featuring fast and secure shipping, expert support from Germany and Austria, and a note about 10 years of reliable partnership.

Image: Two customer service representatives with headsets, one smiling, indicating readiness to assist with any questions.