Teed Substations for
Germany's Energy Transition
Faster · Cheaper · Standardised
EGI Strategic Pitch
Germany · 2026
Full EPC
Teed Substations for
The Problem
Germany's Grid Connection Bottleneck
Renewable energy projects are ready — but grid connection backlogs are stalling the Energiewende
0
PV to connect by 2030
50Hertz target
€9B
Annual economic drag
EU connection queue delays
2030
Stalled queue until
Some solar farms waiting
50Hertz must connect 13 GW PV, 11 GW batteries, 2 GW wind by 2030. Connection speed — not permits — is the critical path. Small teed substations are the fastest unlock.
The Solution
Teed Substation Deployment — The EGI Way
🔌
T-Connection on Existing Lines
Tap into existing 50Hertz transmission lines. No new line corridors — faster permitting, lower civil cost.
🧩
Legonet™ Standardised Design
Adapt Elia's proven Legonet modular standards to 50Hertz specifications — off-the-shelf components, repeatable layouts.
⚙️
Full EPCM Scope
Primary systems, Secondary systems, FACTS, Cables, Civil Works. Single accountability. One contract. Zero gaps.
🏗️
€15M Budget Per Station
Compact budget driven by standardisation. 2 stations in parallel. Construction start 2025. Third-party clients welcome.
Why EGI
Unique Positioning in the German Market
300+
Projects in 20+ countries
50Hertz
Sister TSO · Shared DNA
30–380kV
Full voltage range
✓ Insider knowledge of 50Hertz standards
EGI is a subsidiary of Elia Group, which owns 50Hertz. EGI understands technical requirements, workflows, and approval processes from the inside.
✓ Proven experience on similar projects
Gransee, Heinersdorf, Altdöbern, Teufelsbruch substations already delivered. Tapped substation and T-line expertise is battle-tested.
✓ Existing framework agreements with 50Hertz
Active commercial relationship reduces procurement time and de-risks new projects from day one.
Standardisation
Legonet Standard → 50Hertz Adaptation
Applying Elia Belgium's modular substation framework to the specific requirements of the 50Hertz network
Legonet Principles
- ▶ Pre-engineered, repeatable substation blocks
- ▶ Off-the-shelf standardised equipment selections
- ▶ Factory-tested secondary systems panels
- ▶ Common civil and structural layouts
- ▶ Scalable: single or double transformer bays
50Hertz Adaptation Layer
- ▶ Aligned with 50Hertz grid codes and technical specs
- ▶ Teed / T-connection configurations (6 types)
- ▶ German regulatory permitting pathways pre-mapped
- ▶ Protection and SCADA integration with 50Hertz systems
- ▶ Optimised for RES (PV, Wind, Battery) connection
Key benefit: Standardisation cuts design time by ~40%, reduces procurement lead times, enables parallel delivery of 2 stations — at a target budget of €15M per substation.
Technical Reference
Teed Substation Topology Variants
Six standard configurations — from simple single-transformer tees to double-tee T-lines with multiple transformers
TYPE 1 — Single Tee · 1 Transformer
Basic T-connection on existing line. Simplest, fastest deployment. Ideal for single RES generator.
TYPE 2 — Double Tee · 2 Transformers
Twin tap on same line segment. Efficient for co-located wind + solar or battery + PV.
TYPE 3 — Line-End Tee · 1 Transformer
Termination at line end with tap. No loop-through required. Lower switchgear count.
TYPE 4 — Line-End Double Tee · 2 Tfmrs
Dual transformer at line terminus. Maximum capacity from a single corridor access point.
TYPE 5 — T-Triangle · 1 Transformer
Delta configuration for redundancy. Preferred for critical loads or anchor generators.
TYPE 6 — T-Triangle · 2 Transformers
Full N-1 secure triangle tee. Highest reliability. Used for large battery or multi-RES clusters.
Delivery Model
Full EPC — Total EGI Responsibility
EGI Full Scope
1
Primary Systems
HV switchgear, transformers, busbars
2
Secondary Systems
Protection, control, SCADA, telecom
3
FACTS
Reactive power compensation, SVCs
4
Cables
Underground HV cables up to 400kV
5
Civil Works
Foundations, roads, fencing, site prep
Scale-Up Strategy
🎯 Dedicated Specialised Team
A specialised T-substation cell within EGI — engineers trained on 50Hertz standards, permanently staffed to own the full delivery pipeline.
🤝 Local Firm Partnership / Acquisition
EGI may team with or acquire a German engineering firm to rapidly scale capacity, access local labour, and accelerate permitting.
📋 Third-Party Expansion
Framework extended to DSOs, industrial consumers, battery developers — under the same standardised model.
Programme
Rollout Roadmap
Phase 0 — Foundation
2025 Q1–Q2
Establish dedicated team · Adapt Legonet to 50Hertz specs · Formalise framework agreement · Site selection
Phase 1 — First Construction
2025 Q3–Q4
Construction start Station 1 · Procurement via existing framework · Standardised Legonet drawings · 18-month target commissioning
Phase 2 — Parallel Delivery
2026
Station 2 in parallel · Local firm teaming / acquisition finalised · Third-party pipeline activated
Phase 3 — Scale
2027+
Industrialised delivery model · 4+ stations/year · Extended to other 50Hertz connection types · Full German market presence
Value Proposition
What EGI Brings to 50Hertz & Clients
Three distinct advantages no other contractor can replicate
⚡
Speed
Standardised designs = no re-engineering. Existing framework cuts lead times. 2 stations in parallel.
💶
Cost Reduction
Legonet standardisation targets €15M/station. Engineering reuse reduces capex ~20–30% per successive project.
🏅
Quality Assurance
Full EPC accountability. EGI carries 50Hertz DNA — delivering to the operator's own standards.
For 50Hertz: Faster RES integration, lower connection costs, trusted delivery partner with insider knowledge.
For RES developers: Predictable timelines, bankable technical solution, single EPC contact — improving project IRR.
Next Steps
EGI — The Right Partner
for Germany's Grid Sprint
EGI proposes to establish a dedicated Teed Substation delivery unit in Germany, leveraging Legonet standards and 50Hertz insider expertise to connect renewable generators and loads faster and cheaper than any other contractor.
Step 1
Approve dedicated team formation & Legonet adaptation programme
Step 2
Identify first 2 pilot sites with 50Hertz pipeline
Step 3
Evaluate local German engineering firm partnership / acquisition
Elia Grid International · eliagrid-int.com