What Are TNUoS Charges?
TNUoS (Transmission Network Use of System) charges are fees that cover the cost of operating and maintaining the UK’s high-voltage electricity transmission network. These charges are levied by National Grid Electricity System Operator (NGESO) and passed on to consumers via energy suppliers.
Why TNUoS Charges Matter
TNUoS charges currently account for around 10% of electricity costs and are forecast to rise from £5.3 billion in 2025/26 to £6.2 billion in 2026/27. For energy-intensive businesses, this shift could significantly impact operational costs and long-term energy planning.
Ofgem is exploring reforms to make these charges more stable and better aligned with national energy goals, such as Clean Power 2030.
How Solar PV Can help reduce costs
One of the most effective ways to reduce exposure to rising grid costs is through on-site generation, such as solar PV. By generating electricity on-site, businesses can:
- Lower reliance on grid-supplied power
- Avoid peak transmission charges
- Improve energy resilience
- Strengthen ESG performance
At Energy Gain UK, we help businesses design and deliver solar energy systems, including rooftop, ground-mounted, and solar carport installations. Our consultancy services use advanced modelling tools to ensure every solution is tailored to your site, energy profile, and strategic goals.
Let’s talk about how Energy Gain UK can help your business navigate these changes and build a more sustainable energy future: ☎️ 0161 330 7739 | ✉️ info@energygain.co.uk
