With so-called balcony power plants and other mini energy generation plants (mini-EAA), consumers can generate a certain amount of electricity themselves, reduce their electricity costs and make a contribution to the energy transition.
In order to significantly simplify the use of mini power generation systems, the VDE is now presenting a position paper that was drawn up last year. This paper provides the basis for the electrical safety of the systems - it is based on the VDE set of regulations. With the suggestions for simplification, the association wants to help ensure that the use of mini power generation systems can be implemented across the board in the future without compromising on safety.
In a position paper, experts from the VDE identify five points from which the set of rules can be further developed:
1. Introduction of a de minimis limit of up to 800 W
At the European level, a de minimis limit of up to 800 W was introduced with the Regulation for Generators (RFG). As part of the European standardization, the VDE proposes adopting this de minimis limit in Germany as well. Thus, systems up to 800 W would no longer be considered "grid-relevant" from the point of view of the grid operator.
Along with this, the preliminary standard for plug-in solar devices (VDE V 0126-95) is to be adapted to the 800 W limit and expanded to become the European standard. This standard offers manufacturers the opportunity to develop and sell plug-in solar devices as a complete system. For consumers, this standard enables them to buy a balcony power plant as a tested, ready-to-plug-in complete system, because until now balcony power plants have sometimes been an arbitrary combination of individual components.
2. Mini power generation systems may be used on any type of meter
Another requirement of the VDE is that mini power generation systems may be used on any meter type up to the minimum limit (i.e. 800 W total system output). Counters should also be allowed to run backwards within the framework of the de minimis limit. Consumers who want to save electricity costs with the help of such a system do not have to wait until the federal government has decided to change their electricity meter to a smart meter.
3. Simplified registration and commissioning
In order to reduce the bureaucratic hurdles to a minimum, in future it should only be necessary to register or deregister the mini power generation system with the Federal Network Agency or to report changes to the system.
4. Toleration of the Schuko plug as a plug-in device for feeding in up to 800 W
In principle, the VDE prefers installation by a specialist tradesman, as this is the only way to check the suitability of the installation and adjust it if necessary. In order to enable the widespread use of mini power generation systems, the VDE is in favor of tolerating the Schuko plug for the feed up to a total system power limit of 800 W.
5. Safety requirements for mini power generation plants
Finally, the VDE demands from the manufacturers of plug-in mini power generation systems that they transparently show possible risks when using them. This applies, among other things, to the description of safe assembly and commissioning. The manufacturer should also be obliged to ensure the electrical safety of the systems. The VDE recommends that mini power generation systems be tested by an independent testing institute so that the customer can use a safe device at home.
(Source: VDE )