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Endesa 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 Endesa's best option (Endesa ATR Fija Premium) at €67.11 per month.

Endesa Best Bill
€67.11
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

Endesa wins here. Their flat rate is 0.104328 €/kWh compared to Iberdrola's 0.1249 €/kWh.

Best Time-of-Use Rate

Endesa has cheaper off-peak hours (0.09441 €/kWh vs 0.09999 €/kWh).

Scorecard Comparison

Metric (1-10)EndesaIberdrola
Price Competitiveness
6
6
Solar Suitability
6
7
EV Suitability
6
7
Simplicity
5
5
Customer Service
4
5
Transparency
5
5

Full Head-to-Head Comparison

Endesa

Endesa

3.9 / 5 (12,000+ reviews)
Founded1944
Customers10,000,000+
EnergyMixed (Renewables + Nuclear + Gas)

Pros

  • Physical offices across Spain
  • Very stable company
  • Competitive digital-only rates
  • Wide range of home services

Cons

  • Customer service can be slow
  • Complex billing structure
  • Aggressive marketing practices

Available Tariffs

One Luz

Est. Monthly Bill
€75.19
Energy (24h)0.124571 €/kWh
Potencia (P1 / P2)0.094967 / 0.094967 €/kW
Solar ExportN/A
Fixed FeeNone

Endesa Solar Plus Virtual Battery

Est. Monthly Bill
€88.31
Energy (24h)0.1599 €/kWh
Potencia (P1 / P2)0.093666 / 0.093666 €/kW
Solar Export0.06 €/kWh
Fixed FeeNone

Endesa ATR Fija 24

Est. Monthly Bill
€71.36
Energy (24h)0.115477 €/kWh
Potencia (P1 / P2)0.093666 / 0.093666 €/kW
Solar ExportN/A
Fixed FeeNone

One Luz 3 Periodos

Est. Monthly Bill
€73.01
Energy (P1 / P2 / P3)
0.18621 / 0.11781 / 0.09441
€/kWh
Potencia (P1 / P2)0.093665 / 0.093665 €/kW
Solar ExportN/A
Fixed FeeNone

Conecta Luz

Est. Monthly Bill
€69.25
Energy (24h)0.109 €/kWh
Potencia (P1 / P2)0.094967 / 0.094967 €/kW
Solar ExportN/A
Fixed FeeNone

Endesa ATR Fija Premium

Est. Monthly Bill
€67.11
Energy (24h)0.104328 €/kWh
Potencia (P1 / P2)0.093666 / 0.093666 €/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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