While I can't directly provide you with a PDF, I can guide you on where you might find this standard:
If you find an older VDE-AR-N 4105 English PDF from 2011, discard it. The November 2018 update introduced critical changes:
| Feature | 2011 version | 2018 version | | :--- | :--- | :--- | | Active power limiting at 50.2 Hz | 40% P_n/Hz | 40% P_n/Hz (clarified ramp times) | | Voltage ride-through | 0.85 – 1.15 p.u. | Enhanced to 1.10 p.u. continuous | | Reactive power capability | Required > 3.68 kVA | Required > 4.6 kVA | | Measurement accuracy | Class 1 (meters) | Class 0.5S for >30 kVA | | Interface protection relay | Required | Mandatory with certified firmware |
Using the 2011 version for a new installation in 2025 would result in automatic failure of grid connection.
| Standard | Region | Key Difference | |----------|--------|----------------| | VDE-AR-N 4105 | Germany (LV) | Strict 40% / Hz for 50.2 Hz, 60 s reconnection delay | | VDE-AR-N 4110 | Germany (MV) | For medium voltage (1 kV – 110 kV) | | IEC 61727 | International | Less strict frequency-watt response | | IEEE 1547 | USA | Different voltage/frequency limits (e.g., 60 Hz system) |
If your budget is too tight for the €300+ PDF, consider these next-best resources:
While I cannot provide the PDF directly, you can purchase and download the official English version from the VDE Publishing House:
Disclaimer: This paper is for educational and informational purposes only. It does not replace the official standard document and should not be used for legal compliance or final engineering certification. vde-ar-n 4105 english pdf
VDE-AR-N 4105 is the German technical connection rule for power generation systems (like solar PV or battery storage) connected to the low-voltage distribution network. It ensures that small-scale energy systems support grid stability rather than disrupting it.
While the full official standard is usually a paid document, English versions are available for purchase via the VDE Verlag . Key Technical Requirements
The standard focuses on how decentralized systems must behave when connected to the public grid:
Reactive Power Provision: Systems above 3.68 kVA must provide reactive power to help maintain voltage levels in the local grid.
Grid and System (GSP) Protection: A monitoring unit must immediately disconnect the system from the grid during faults (like voltage or frequency spikes) to prevent islanding.
Capacity Limits: For systems < 30 kW, protection integrated into the inverter is typically enough. Systems > 30 kW often require external GSP protection.
Frequency Response: Generators must adjust their power output based on grid frequency (e.g., reducing output if the frequency is too high) to prevent grid collapse. While I can't directly provide you with a
Phase Balance: Power must be distributed evenly across all three phases to avoid unbalanced loads that can destabilize the local network. Comparison with Other VDE Standards
VDE-AR-N 4105 is part of a hierarchy based on voltage levels: Target Network Typical Application VDE-AR-N 4105 Low-Voltage (LV) Home solar, small batteries, small commercial VDE-AR-N 4110 Medium-Voltage (MV) Large industrial solar, wind farms VDE-AR-N 4120 High-Voltage (HV) Large energy parks, transmission level Compliance & Documentation VDE-AR-N 4105 Anwendungsregel:2018-11 - Standards
VDE-AR-N 4105 is the essential German technical application rule for connecting and operating power generation systems (like solar PV and battery storage) within the low-voltage distribution network. VDE Verlag
Whether you are an installer, manufacturer, or network operator, understanding this standard is key to ensuring grid stability and safety. Key Highlights of VDE-AR-N 4105 Applies to distributed power systems typically up to , including home solar and small commercial storage. Grid Support:
Mandates specific reactive power regulation and frequency/voltage stability functions to support the public grid. Safety & Protection:
Requires integrated network and system (NS) protection (e.g., anti-islanding) to prevent dangerous feed-ins during grid faults. Storage Integration:
Modern versions (2018-11 and later) include specific requirements for energy storage systems and bidirectional charging. Simplified Connection: Technical Report: VDE-AR-N 4105 – Generators Connected to
Recent updates (like the 2026-03 revision) have simplified registration for small plug-in PV systems up to VDE Association Where to find the English PDF?
The official English translation is a commercial document published by the VDE Verlag VDE-AR-N 4105 Anwendungsregel:2018-11 - Standards
The VDE-AR-N 4105 is the primary German application rule for connecting and operating power generation systems (like solar PV and energy storage) to the low-voltage distribution network. Official English PDF and Access
While the original standard is in German, an official English translation is available for purchase from the VDE Shop.
Official Version: VDE-AR-N 4105:2018-11 is the most recent full revision.
Key Update: A Corrigendum (Berichtigung 1) was released in October 2020 to refine specific technical requirements. Summary of the Standard
The guide outlines technical minimum requirements to ensure safe grid integration and high power quality. Documents - VDE FNN
I’m unable to directly provide or complete a full report for the standard VDE-AR-N 4105 in PDF form, as that would involve distributing copyrighted material. However, I can give you a structured summary and essential technical content that you could use as the basis for your own report.
Here is a comprehensive report outline covering the key points of VDE-AR-N 4105 (English version reference):