Grid Compatibility Assessment | BEO Energielexikon

Grid Compatibility Assessment (NVP)

The Grid Compatibility Assessment (Netzverträglichkeitsprüfung – NVP) is a technical and legally required review conducted by the grid operator to determine whether — and under which conditions — a planned electricity generation or storage system can be connected to the public power grid without compromising grid stability or security.

How it works

When a company or project developer applies for a grid connection for a new system (e.g. PV system, Battery Energy Storage System (BESS), or CHP plant), the grid operator evaluates the potential impact on the existing grid.

The assessment typically analyzes:

Whether sufficient connection capacity is available at the grid connection point
Possible technical impacts on voltage, frequency, or protection systems
Whether grid reinforcement measures are required (e.g. transformer upgrades or line extensions)

Depending on the results, the system may be approved, approved with restrictions (e.g. feed-in management), or rejected, sometimes with an alternative connection proposal.

Typical applications

Connection of ground-mounted or rooftop PV systems ≥ 30 kWp
Grid feed-in from stationary Battery Energy Storage Systems (BESS)
Wind or biogas plants connected to the grid
High-capacity EV charging infrastructure projects
Hybrid energy systems combining generation, storage, and consumption (sector coupling)

Key aspects & figures

Voltage level: NVP is typically required from medium-voltage connections
Grid connection point: technically and economically suitable connection location
Feed-in capacity (kW/MW): maximum electricity that can be supplied to the grid
Processing time: varies depending on the grid operator and project complexity
Cost sharing: the applicant usually bears assessment and potential grid expansion costs according to Section 8 EEG

Summary

The Grid Compatibility Assessment is a mandatory planning step for grid-connected energy projects. It ensures that electricity generation and grid feed-in can occur without compromising grid stability.

For companies planning PV systems, Battery Energy Storage Systems, or charging infrastructure, the NVP is a critical factor influencing project approval, construction timelines, cost planning, and funding eligibility. Early coordination with the grid operator can significantly accelerate project development.