FairNetz launches self-check tool based on envelio’s OCC

The expansion of photovoltaic systems in Germany continues at full speed – in 2024 alone, around 16 gigawatts (GW) of new PV capacity were installed. This brings the total installed PV capacity to over 100 GW for the first time.

This trend is also clearly visible in the grid area of FairNetz GmbH: Around 11,700 PV systems are already feeding into the grid – roughly every fifth rooftop contributes to power generation. A success story for the energy transition – but also a growing challenge for grid operators.

Originally designed for centralized power generation from large power plants, today's electricity grids have effectively become decentralized generation networks. In some regions, the installed capacity already exceeds peak load. This means that, at least theoretically, more power is being produced than the grid can absorb at any one time. On particularly sunny days, so-called solar peaks occur, pushing the grid to its capacity limits.

For grid operators like FairNetz, this means that grid connection requests must be assessed with greater care, and a direct feed-in option is not always immediately available. Still, PV projects must not be slowed down. What’s needed are flexible solutions that adapt to local grid conditions.

FairNetz has therefore introduced a zero-feed-in model as an interim solution. Customers can install and use their PV system for self-consumption, even if feed-in to the public grid cannot yet be approved. Once the necessary grid expansion measures are complete, feed-in permission can be granted retroactively.

But how can users find out early on whether feed-in is currently possible?

That’s where our Online Connection Check (OCC) comes into play. Based on envelio’s OCC app, FairNetz has implemented a digital tool for checking grid connection feasibility. This allows users to check, within just a few clicks on the FairNetz website, whether a grid connection for feed-in is currently available at their home – simple, quick, and transparent.

The tool saves valuable time for grid planners, as it is designed as a self-service check and offers planning certainty for all stakeholders. For grid operators, it significantly reduces the workload involved in processing standard connection requests.

Our collaboration with FairNetz demonstrates how digital solutions can prove their value in the daily reality of the energy transition – practical and effective.