
The LUZ123 blog
Understand your electricity, pay what's fair
Clear guides to Spanish electricity bills, tariffs and saving money, written from the Costa Blanca.

cambio28 August 2026
Switching electricity supplier in Spain: what actually happens (and what doesn't)
No power cuts, no technician visits, no gap between contracts. Here is how a supplier switch really works.
Read the article →
potencia28 August 2026
Contracted power: the part of your bill almost nobody checks
You pay for your contracted kW every day of the year, whether you use them or not. Here is how to tell if you have too much.
Read the article →
facturas28 August 2026
How to read your Spanish electricity bill: the five numbers that decide what you pay
CUPS, access tariff, power, energy and taxes: where they are on your bill and what each one means.
Read the article →