Element-Level Billing

2025-10-09

An electricity bill is made up of many individual elements, each with a cost attached to them. Some examples of elements are:

• ccl (Climate change levy)
• eii (Energy intensive industry support payments)
• duos-availability (Distribution cost based on size of connection)
• duos-red (Distribution cost based on peak time consumption)
• bsuos (Balacing System charge)
• ...and so on

Up to now, Chellow stored these elements and their associated backing data as a field in the bill. From now on, Chellow separates out each element and gives it its own row. So that a bill has several elements attached to it. Each element contains:

• Name
• Net GBP
• Start Date
• Finish Date
• Breakdown (containing the supporting data such as rate, kWh etc.

Here's an examlple of the elements section of the bill page:

One advantage of doing this is that we can properly represent a single bill that has elements that are for different periods to the period of the bill. Another advantage is that it gives added clarity in bill checking.