Understand, forecast and manage your TNUoS charges with expert support
Transmission Newtork Use of System (TNUoS) charges can have a significant impact on energy costs for organisations. Equity Energies helps businesses understand their exposure, improve forecasting, and make better-informed decisions around transmission costs.
With banding changes now having a greater impact on fixed charges, it is also increasingly important to understand whether your sites are in the right band.
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What are TNUoS charges?
TNUoS stands for Transmission Network Use of System charges. These are charges applied to electricity users for the use of the national transmission network that moves power around Great Britain.
For larger organisations, TNUoS charges can represent a meaningful and often volatile part of overall electricity costs. They are influenced by factors such as demand, network requirements and charging methodology, which can make them difficult to predict without specialist insight.
TNUoS is also increasingly shaped by banding. A site’s TCR band can determine the level of fixed residual charge applied, which means being placed in the wrong band, or drifting into a higher band unnecessarily, can have a direct cost impact.
What it is
A transmission charge applied to electricity use.
What it is
A transmission charge applied to electricity use.
What it is
A transmission charge applied to electricity use.
Why TNUoS matters to
your business
For businesses with large or complex electricity demand, TNUoS is not just a technical charging issue. It can have a direct impact on budgets, forecasting and cost control.
For multi-site organisations and energy-intensive operations, even relatively small changes in TNUoS can add up at portfolio level. Banding also matters: if a site is in the wrong band, or close to a band threshold, fixed charges may be higher than expected.
- Charges can fluctuate year to year
- Forecasting can be difficult without specialist support
- Exposure may be higher across large or flexible estates
- Banding errors or over-specified capacity can increase fixed charges
- Sites near a band threshold may face a sharp jump in cost
- Poor visibility can lead to budgeting pressure and reactive decisions
Need clearer visibility of your TNUoS exposure?
We help organisations understand, forecast & manage TNUoS charges with greater confidence, including whether sites are correctly banded and where cost-saving opportunities may exist.
How Equity Energies supports TNUoS management
We help organisations move from uncertainty to informed action.
Equity Energies supports businesses in understanding how TNUoS charges affect their portfolio, what the likely cost implications are, and how those charges can be factored into wider energy strategy. Our role is not just to report numbers, but to help clients interpret them, plan around them, and make better decisions.
That includes helping businesses understand how banding affects fixed residual charges, identify sites that may be misclassified or over-specced, and assess whether capacity and demand profiles are aligned.
Forecasting and modelling
Build a clearer view of likely TNUoS exposure and future cost impact.
Forecasting and modelling
Build a clearer view of likely TNUoS exposure and future cost impact.
Forecasting and modelling
Build a clearer view of likely TNUoS exposure and future cost impact.
Forecasting and modelling
Build a clearer view of likely TNUoS exposure and future cost impact.
What our support can include
Depending on your business needs, support can include:
- Reviewing current and future TNUoS exposure
- Supporting cost forecasting and budget planning
- Analysing portfolio-level impact across sites
- Identifying risk areas and cost drivers
- Reviewing TCR banding positions across the estate
- Highlighting sites that may be over-specced or close to the next band threshold
- Assessing whether contracted capacity and actual demand are aligned
- Providing strategic input into wider energy planning
- Helping internal teams better understand likely charge movements