Why do so many grid connections fail?
80% of rejected grid connections could have been approved with proper preparation.
Grid Bottlenecks
The grid operator rejects because the transformer is 'full'. But is it really? Often only a detailed load flow analysis is missing, showing that 30% capacity is still available.
→ New transformer: €80,000 - €250,000
Unknown Capacity
You're planning a 5 MWp PV system, but nobody knows how much the grid can actually absorb. Without professional grid calculation, you're planning blind - risking expensive corrections.
→ Planning changes: €50,000+
Approval Delays
18-24 months until grid connection approval? Standard. But with a complete, technically sound grid compatibility study upfront, this can be reduced to 6-12 months.
→ Delay costs: €10,000/monthTypical Grid Analysis: Where are the bottlenecks?
Our analysis identifies exactly where the bottlenecks are - and how they can be resolved.
Professional Grid Analysis Saves Millions
With 350+ completed grid studies, we know exactly what grid operators want to see.
3D Grid Topology
Precise simulation of all load flows in the grid under various scenarios (maximum load, minimum load, feed-in case). We identify free capacities that the grid operator overlooked.
✓ On average 25% more usable capacity found
Real-Time Simulation
Simulation of transient processes: How does the grid behave during load jumps, PV fluctuations, or BESS activation? Essential for grid operator approvals for large systems.
✓ Proof of grid stability in real-time
Grid Optimization
Detailed analysis of voltage conditions along the entire line. With Q(U) control, reactive power compensation and intelligent feed-in management, we maintain any voltage band.
✓ 95% of problems solvable without grid expansionReturn on Investment
A grid analysis costs €5,000-15,000. What you save:
Complete Grid Analysis Services
Everything you need for successful grid integration.
Voltage Profile Analysis
Detailed voltage analysis along the transmission line with Q(U) control and reactive power management for optimal grid stability.
Thermal Loading Analysis
Monitoring thermal limits of transformers and lines to prevent overloading and failures.
Grid Stability 50Hz
Frequency stability analysis to ensure grid quality and compliance with 50Hz standard in all operating conditions.
Contingency Planning
N-1 and N-2 failure analyses with automatic backup paths and emergency scenarios for critical infrastructure.
Grid Expansion Planning
Strategic planning of grid expansions with cost-benefit analysis and investment prioritization.
Regulatory Compliance
Complete documentation per VDE-AR-N 4105/4110 and IEC 60909 for smooth grid operator approvals.
The right package for your project
Grid Compatibility Study
The standard for grid connection requests from 135 kVA. Complete documentation per VDE-AR-N 4105/4110.
Deliverables
- Load flow calculation all scenarios
- Voltage band verification
- Short-circuit calculation
- Grid operator compliant documentation
Capacity Analysis
How much can your grid really absorb? We find hidden reserves and optimize your connection size.
Deliverables
- Analysis of all grid nodes
- Capacity heat map
- Optimal connection power recommendation
- Alternative connection points
BESS Integration
Special study for battery storage: How does BESS affect the grid during charging/discharging? FCR/aFRR prequalification.
Deliverables
- Dynamic simulation charge/discharge cycles
- FCR/aFRR prequalification documentation
- Reactive power concept
- Grid feedback analysis
Industrial Grid Analysis
For production facilities with fluctuating loads: Motor startup, welding machines, presses. Connection power optimization.
Deliverables
- Load profile analysis 15-minute
- Flicker calculation
- Harmonic analysis
- Compensation concept
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Frequently Asked Questions
A standard grid compatibility study costs between €5,000 and €15,000, depending on complexity. For large projects from 10 MW, it can be €20,000-40,000. The investment typically pays back 10-50x through avoided grid expansion costs.
A standard grid compatibility study takes 2-4 weeks, complex studies with dynamic simulation 4-8 weeks. The key factor is data availability from the grid operator - with good grid data, the time is significantly reduced.
Formally from 135 kVA (approx. 100 kWp PV). Economically it makes sense from 500 kW, where potential grid expansion costs can quickly reach six figures. For BESS projects, we recommend an analysis from 1 MWh.
In 95% of cases, yes. Most rejections are based on blanket assumptions by grid operators. A detailed study often shows that with intelligent control (Q(U), feed-in management, reactive power) the connection is possible after all.
We work with DIgSILENT PowerFactory (industry standard), PSS SINCAL and proprietary Python models for special analyses. All results are compatible with German and European grid operator requirements.