Guide
Short, factual articles on electricity in Spain – each with sources and date. No ads.
Understanding your Spanish electricity bill: every line explained
Término de potencia, término de energía, electricity tax, IVA, meter rental, bono social: what your Spanish electricity bill (2.0TD) says – explained in plain English.
PVPC or free market? Spanish electricity tariffs compared honestly
Regulated PVPC tariff with hourly prices or a fixed price on the free market? What separates the two tariff types in Spain and how to compare neutrally.
Lowering your contracted power (potencia) in Spain
Contracted power (potencia contratada) costs money every day – even without consumption. How to check whether yours is too high and what one kW costs.
Solar PV in Andalusia: costs, yield and permits
What a rooftop solar system in Andalusia costs, how much it produces and the steps to legalise it.
Virtual battery (batería virtual) at Naturgy and Endesa explained
What a batería virtual really brings in Spain, how it differs from compensación simplificada and what Naturgy and Endesa offer (as of 11/2026).
Switching electricity supplier in Spain: free, fast, no new meter
How switching electricity supplier works in Spain: cost, duration, penalties, what you need and what to check beforehand.
Check your own bill
The calculator explains your bill line by line and works with your own figures.