For each supply point the supplier has to pay the various costs of transmission, distribution, meter operation, data collection, tax etc.
MSP kWh is the amount of electricity consumed at the 'meter supply point', which is the customer's meter.
GSP kWh is obtained by multiplying the MSP kWh by the Line Loss Factor (LLF, a figure > 1) to include the amount of electricity lost when it is conducted through the distribution network, from the 'grid supply point' to the customer's meter.
[1] The tariff may include pass-through costs, which are amounts charged to the energy supplier and then "passed through" directly to the consumer.
Residual Cashflow Reallocation Cashflow (RCRC), also known as the 'beer fund', is the net remainder of Balancing & Settlement Code (BSC) Trading Charges for a given half-hour, which is payable to (in the case of a surplus) or by (in the case of a deficit) Trading Parties based on their market share of energy volume.
Alternatively, the capacity charge can just return to the original availability figure in the subsequent month's bill.
[5][6] This also varies with each distribution area, and is charged if the power factor for a supply is deemed too low.
If a supplier is unable to produce the required number of ROCs, they must pay an equivalent cash amount, the 'cash out price'.
[11] The cost of the electricity (without surcharges) is occasionally negative during low consumption and high winds, starting in 2019.