kW (kilowatts) that you will have the right to consume at the same moment. Your kW contracted will be billed daily for the unit price regardless of whether there is consumption or not. That's why it's considered a fixed cost on your bill
kWh (kilowatts consumed per hour) that will be billed according to the consumption you make during the billing period. That's why it's considered a variable cost on your bill.
If you have a significant energy consumption and the operation of your electrical devices use coils that transform the energy into electromagnetic fields it is possible that we invoice you for the reactive energy kVarh. To avoid this cost, you can evaluate the purchase of a condensing battery as it will absorb this bad energy and prevent it from affecting the distribution network.
Meter rent cost:
It is the monthly amount paid to the distributor in case of not having a property counter. The price varies depending on the equipment and the costs associated with your installation, certification and maintenance and is set by the Ministry of Energy, Tourism and Digital Agenda, as published in the BOE. You can also make an investment, buy and install your own meter, so you don't have to pay this small rent monthly. The disadvantages are that the maintenance and breakdowns will be dealt on your own.
It is one of the special manufacturing taxes set by the Ministry of Industry, such as the one with gasoline or tobacco. It appears on the electricity bills, regardless of your company or your rate. It assumes a 5.12669632% power and energy term.