September 30, 2026

What if your project suddenly requires high voltage?

What if your project suddenly requires high voltage?

In the middle of your project, you realize that the existing electrical connection is insufficient and needs to be upgraded. In some cases, this upgrade will also mean you’ll have to switch to a different grid voltage (medium-voltage or high-voltage). This discovery instantly changes your design, your investment budget, your schedule, and possibly your permit application. The risk doesn’t necessarily lie in the upgrade itself, but in the moment you discover this need. Anyone who learns halfway through their project that a higher-capacity connection is needed will face redesigns, adjustments, and delays that were not budgeted for. The project falls behind schedule, as do the expected returns on the investments made. This scenario can be avoided, provided you identify this issue early enough in your project timeline and address it systematically.

When should you plan for a grid upgrade?

The most important question is not whether your project exceeds a certain capacity limit. What is more relevant is whether the expected maximum power demand after the project is completed will remain within the current contractual capacity of your connection agreement.

If you anticipate new peaks that exceed this capacity, you should take action as soon as possible. A minor exceedance may still be accommodated by the existing connection following a technical assessment—for example, by amending the connection contract, better managing consumption, or gradually increasing the load.

If the demand exceeds the capacity by a larger margin, that is usually not enough. In that case, grid reinforcement may be necessary. Depending on the extent of the power demand and the capacity of the local grid, this may involve:

  • an upgrade to the existing connection
  • a new connection at the same voltage level
  • an additional enclosure, internal grid reinforcements, a transformer, or a power cable
  • or a connection to a higher voltage level

A grid upgrade is considered when a project significantly alters the existing power demand or generation. This may be the case, for example, with:

  • the electrification of industrial thermal processes
  • the expansion of production capacity, production lines, or floor space
  • the electrification of vehicles and internal transportation
  • new industrial processes or data centers
  • decentralized generation with significant capacity
  • battery storage or other flexibility applications
  • various new systems that are being put into service simultaneously

Do you expect your future peak demand to exceed your current contractual capacity? If so, have the appropriate grid upgrades and voltage level for your site assessed well in advance. By having your future capacity needs assessed early, you can avoid delays and additional costs.

What if you find this out after you've submitted your permit application?

A late realization that you need to upgrade your connection sets off a chain reaction:

Design adjustments: An HS system (cabinet, transformers, safety equipment, shielding) takes up physical space and has technical requirements. You may need to modify your architectural layout.

Unforeseen costs: The CAPEX for a high-voltage installation had not been budgeted. The switchgear, transformer, and connection work—it all adds up quickly.

Permit Delays: Changes to the location of a booth or barrier may result in the need to resubmit an application or undergo additional rounds of the permitting process.

Planning that gets out of hand: grid operators work according to their own lead times. A late application means waiting for Elia or Fluvius, regardless of your own construction schedule. In addition, lead times for switchgear and transformers needed for internal modifications are also very long in the current market.

These are not insurmountable challenges. However, they are entirely preventable.

Integrate the grid reinforcement from the start

The approach is simple: identify the possible scenarios before you submit your permit application. This requires a few extra weeks in the preliminary phase, but saves months later on.

Step 0 – Assessing Needs

We assess your current electricity needs as well as your future capacity requirements (if this has not already been done). We determine your current peak demand and examine which planned projects could cause you to exceed your contracted capacity. For each project, we compile the expected capacity impact and timing into a clear capacity forecast.

Step 1 – Strategic Network Analysis

We identify the voltage levels available near your location: Fluvius distribution points and Elia transmission points. Can your power demand be met at the existing voltage level, or do you need to consider 36 kV or 150 kV? This forms the basis for any further decisions.

Step 2 – Grid Study Requests with HS Scenarios

We prepare the applications for Fluvius and/or Elia, including various scenarios. This ensures you receive a response that goes beyond the most obvious connection option—and that it’s on the table before your permit is issued.

Step 3 – Technical and Financial Comparison

We’ll compare the scenarios side by side: connecting to Elia versus Fluvius, in terms of CAPEX, OPEX, physical space, timing, and complexity. This way, you can make an informed decision, not a forced one.

Step 4 – Integration into the design and permitting process

We incorporate the selected scenario into the architectural and technical plans before submitting the permit application. No more surprises later in the process.

Step 5 – Final Network Study and High-Speed Rail Design

We oversee the final power distribution study and the design of the high-voltage installation—cabinet, transformer, grounding, and protection—in full coordination with your architectural and electrical designs. No disconnected pieces of the puzzle.

Confidence Right from the Start

For high-power projects, grid reinforcement will be necessary sooner or later. It’s not a question of “if,” but of “when” you’ll discover this, and how well prepared you are for it.

Would you like to know what connection options are realistic for your site, and how to incorporate this into your project planning proactively? We’d be happy to explore this with you.

‍

Downloads

No items found.

Would you like to know which connection options are realistic for your project?

Contact our expert

Hannes Stubbe

Related news items

What if your project suddenly requires high voltage?
in the spotlight
September 30, 2026

What if your project suddenly requires high voltage?

Anyone who discovers halfway through a project that the electrical connection needs to be upgraded faces costly redesigns and months of delays. This scenario can largely be avoided with early checks.
Grid Congestion in Flanders: Why You Need to Take Action Now to Meet Your Future Energy Needs
in the spotlight
June 23, 2026

Grid Congestion in Flanders: Why You Need to Take Action Now to Meet Your Future Energy Needs

Grid congestion threatens your energy needs: in virtually all of Flanders, large-scale consumers no longer receive the full power they need when grid congestion occurs. Don’t wait until you’re stuck—find out now how to make your electrification plans future-proof.
Lower CO₂ emissions and greater energy efficiency
in the spotlight
January 18, 2026

Lower CO₂ emissions and greater energy efficiency

Many Flemish companies currently view the EBO as an administrative burden. Mandatory reporting, lots of paperwork, little inspiration. But what if we linked energy management to strategy, innovation, and competitiveness?