1. Why medium voltage makes solar parks more efficient

The analysis by Fraunhofer ISE makes it clear that solar parks with medium voltage as the starting level require fewer transformation stages. This reduces the effort for inverter, Cabling and protection technology significantly. Project developers benefit from reduced technical complexity and can implement systems more quickly. At the same time, the higher voltage level makes it easier to integrate large amounts of energy into regional networks, which improves network stability and makes renewable energy more efficient to use.

2. Large photovoltaic systems gain new perspectives

Instead of complex low-voltage networks, medium-voltage solutions create a much more compact electrical system architecture. The reduced number of individual components minimizes risks and accelerates approval processes. Particularly in solar parks of 20 megawatts or more, it is clear that medium voltage enables lower electricity production costs in the long term. This makes the technology increasingly attractive for large-scale systems.

Dr. Markus Schäfer, PV system technology expert at Fraunhofer ISE, describes the advantages as follows:

“The biggest cost drivers are rarely the solar field itself, but rather the electrical connection. Using medium voltage reduces transformation stages, cabling effort and network protection requirements. This significantly reduces costs and makes large solar parks more future-proof.”

3. Improved planning and higher operational reliability

The use of medium voltage leads to more stable operating processes and reduced risk of failure. Fewer components also mean less maintenance. Investors welcome the technology because it enables reliable earnings forecasts. Operators benefit from more robust systems and improved load management.

This brings additional advantages for long-term performance and network stability. The reduced technical complexity ensures that systems can run consistently and with little disruption for many years. Because medium voltage reduces line losses and relieves the load on the electrical infrastructure, it increases the park’s overall efficiency from the first day of operation. Grid operators also benefit because a more consistent feed-in makes it easier to integrate high PV outputs and reduces interference in grid operations. This creates a planning advantage for everyone involved – from financing to daily operations.

4. As photovoltaics expand, its importance also grows

With the planned massive photovoltaic expansion in Germany, the relevance of powerful grid connection solutions is increasing. Large solar parks must be both economical and compatible with existing networks. Medium voltage offers optimal conditions as it reduces bottlenecks and compensates for network fluctuations. More and more developers are relying on this level of tension in order to better master future challenges.

As the project size increases, the technical complexity also increases. Medium-voltage connections make it possible to transmit large amounts of electricity reliably and with little loss. This reduces the pressure on the distribution networks and at the same time increases planning security for everyone involved. In an energy market that is increasingly dependent on flexible and efficient structures, medium voltage is becoming a central component of further PV expansion.

5. Medium voltage increases efficiency potential: this will be the new industry standard

The findings from Fraunhofer ISE clearly show that medium voltage will play a key role in the construction of large PV systems in the future. It reduces costs, simplifies technical processes and significantly improves network integration. A reliable foundation is created for operators, investors and network operators on which solar parks can be developed efficiently and sustainably.

With the combination of economic advantages, technical reliability and better system integration, medium voltage is developing into a new standard for modern solar park planning. It makes a decisive contribution to advancing the expansion of photovoltaics in Germany faster, more stably and more cost-efficiently.