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Factor Energía vs Iberdrola

Live Comparison • September 2026

A detailed head-to-head comparison covering rates, typical bills, pros & cons, and features to help you decide which is better for your home.

Our Verdict

Overall Winner: Lowest Typical Bill

For a typical Spanish household (3.6kW Potencia, 300kWh monthly usage), Iberdrola is the cheaper option. Their Plan Online 3 Periodos tariff results in an estimated monthly bill of 65.22 (including taxes). This compares to Factor Energía's best option (Factor Tarifa Respira) at €86.97 per month.

Factor Energía Best Bill
86.97
Iberdrola Best Bill
65.22

* Assumption: 3.6 kW contracted power, 300 kWh monthly usage (20% peak, 30% flat, 50% off-peak), including 21% IVA, 5.11% Electricity Tax, and ~€1 meter rental.

Best Flat Rate

Iberdrola wins here. Their flat rate is 0.1249 €/kWh compared to Factor Energía's 0.1596 €/kWh.

Best Time-of-Use Rate

Iberdrola has cheaper off-peak hours (0.09999 €/kWh vs 0.151 €/kWh).

Scorecard Comparison

Metric (1-10)Factor EnergíaIberdrola
Price Competitiveness
7
6
Solar Suitability
8
7
EV Suitability
6
7
Simplicity
8
5
Customer Service
8
5
Transparency
8
5

Full Head-to-Head Comparison

Factor Energía

Factor Energía

4 / 5 (4,000+ reviews)
Founded1999
Customers300,000+
Energy100% Renewable

Pros

  • First independent provider in Spain
  • 100% Certified renewable energy
  • Excellent mobile app for tracking usage
  • Very transparent billing structure

Cons

  • Customer service wait times during peak hours
  • Fixed rates can be slightly higher than variable market rates
  • Focus is primarily on the Spanish peninsula

Available Tariffs

Factor Tarifa Respira

Est. Monthly Bill
86.97
Energy (P1 / P2 / P3)
0.2765 / 0.2184 / 0.151
€/kWh
Potencia (P1 / P2)0.075903 / 0.001987 €/kW
Solar ExportN/A
Fixed FeeNone

Tarifa Fija Precio Único

Est. Monthly Bill
97.34
Energy (24h)0.1596 €/kWh
Potencia (P1 / P2)0.1265 / 0.1265 €/kW
Solar ExportN/A
Fixed FeeNone
Iberdrola

Iberdrola

4.2 / 5 (14,000+ reviews)
Founded1992
Customers11,000,000+
EnergyMixed (Major Renewables Focus)

Pros

  • Massive investment in renewables
  • Top-tier mobile app
  • Strong physical presence
  • Excellent reliability

Cons

  • Standard plans can be expensive
  • Occasional billing errors reported
  • Large corporate structure

Available Tariffs

Plan Más Ahorro

Est. Monthly Bill
88.16
Energy (24h)0.16191 €/kWh
Potencia (P1 / P2)0.109562 / 0.071205 €/kW
Solar Export0.05 €/kWh
Fixed FeeNone

Plan Online

Est. Monthly Bill
75.19
Energy (24h)0.1249 €/kWh
Potencia (P1 / P2)0.119151 / 0.069836 €/kW
Solar ExportN/A
Fixed FeeNone

Plan Estable

Est. Monthly Bill
83.10
Energy (24h)0.148644 €/kWh
Potencia (P1 / P2)0.109562 / 0.071205 €/kW
Solar ExportN/A
Fixed FeeNone

Plan Online 3 Periodos

Est. Monthly Bill
65.22
Energy (P1 / P2 / P3)
0.194 / 0.136 / 0.09999
€/kWh
Potencia (P1 / P2)0.091074 / 0.013483 €/kW
Solar ExportN/A
Fixed FeeNone

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