Your NMI or National Metering Identifier number is a unique number for your house or building’s electricity meter.

The Distributor is the company responsible for maintaining the electricity delivery infrastructure, including poles, wires, transformers, and substations. On your bill, they are listed under 'Faults and Emergencies'.

The solar feed-in tariff (FiT) is the rate, in cents per kWh, that solar owners are paid for sending their excess solar electricity back to the grid.

When a solar system generates more electricity than what's being used by the household appliances and lights, the extra electricity is exported to the grid.

Typically, this payment ranges from 0 to 15 cents per kWh.

In the example of bill C, the plan offers two FiT rates: 11c per kWh for the first 10kWh exported each day, and 6c per kWh after that.

Some plans may offer different FiT rates for peak, shoulder, and off-peak periods.

Some electricity plans include a "peak demand charge," which is based on the highest electricity usage (in kW) averaged over a 30-minute period during peak hours (usually in the evening) within a 30-day period.

To calculate the demand charge, you take the maximum demand (for example, 2kW), multiply it by the demand tariff (e.g., 0.2571c/kW), and then multiply that by the number of days in the month. This means if you use a lot of electricity at once—by running several appliances at the same time—even once during the month, it sets your demand charge.