Supercustomer
Billing ConceptsA billing arrangement where a large energy supplier receives aggregated bills from DNOs for all their customers, then passes these charges through to end customers.
Under the Supercustomer arrangement, DNOs bill energy suppliers for all their customers' DUoS charges in aggregate, rather than billing each end customer directly. This is the standard arrangement for most business electricity customers.
How it works:
- DNO calculates DUoS charges for all meters supplied by each supplier
- DNO sends aggregated bill to supplier monthly
- Supplier pays DNO
- Supplier recovers DUoS from end customers (often bundled into unit rates)
Advantages:
- Simplifies administration for large portfolios
- Single relationship for customers (with supplier, not DNO)
- Suppliers can offer bundled pricing
Why it matters: This is why DUoS appears as a line item on your supplier bill rather than coming directly from the DNO. It also means your supplier is responsible for applying the correct tariff - and where billing errors can occur.
Related terms
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