Iberdrola vs Som Energia

Live Comparison • octubre 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 €75.49 (including taxes). This compares to Som Energia's best option (Som - Tarifa Periodos) at €80.72 per month.

Iberdrola Best Bill
€75.49
Som Energia Best Bill
€80.72

* 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 is the only provider offering a true 24-hour flat rate (0.1499 €/kWh).

Best Time-of-Use Rate

Iberdrola has cheaper off-peak hours (0.129 €/kWh vs 0.15 €/kWh).

Scorecard Comparison

Metric (1-10)IberdrolaSom Energia
Price Competitiveness
6
7
Solar Suitability
7
9
EV Suitability
7
7
Simplicity
5
8
Customer Service
5
9
Transparency
5
10

Full Head-to-Head Comparison

Iberdrola

Iberdrola

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

Pros

  • Inversión masiva en renovables
  • App móvil de primer nivel
  • Fuerte presencia física
  • Excelente fiabilidad

Cons

  • Los planes estándar pueden ser caros
  • Errores ocasionales en facturación
  • Gran estructura corporativa

Available Tariffs

Plan Más Ahorro

Est. Monthly Bill
€104.76
Energy (24h)0.1999 €/kWh
Potencia (P1 / P2)0.109562 / 0.086274 €/kW
Solar Export0.05 €/kWh
Fixed FeeNone

Plan Online

Est. Monthly Bill
€85.87
Energy (24h)0.1499 €/kWh
Potencia (P1 / P2)0.119151 / 0.078055 €/kW
Solar ExportN/A
Fixed FeeNone

Plan Estable

Est. Monthly Bill
€99.98
Energy (24h)0.187375 €/kWh
Potencia (P1 / P2)0.109562 / 0.086274 €/kW
Solar ExportN/A
Fixed FeeNone

Plan Online 3 Periodos

Est. Monthly Bill
€75.49
Energy (P1 / P2 / P3)
0.217 / 0.162 / 0.129
€/kWh
Potencia (P1 / P2)0.091074 / 0.013483 €/kW
Solar ExportN/A
Fixed FeeNone
Som Energia

Som Energia

4.5 / 5 (Local / Coop reviews)
Founded2010
Customers85,000+ members
Energy100% Renewable (Cooperative)

Pros

  • 100% Propiedad de los ciudadanos y sin ánimo de lucro
  • Transparencia total en precios y gestión
  • Excelente participación democrática
  • Invierte directamente en nuevas plantas renovables en España

Cons

  • Requiere una cuota inicial de socio de 100 € (reembolsable)
  • Las tarifas pueden ser ligeramente superiores a las ofertas más agresivas del mercado
  • Sin grandes presupuestos de marketing ni ofertas complejas

Available Tariffs

Som - Tarifa Periodos

Est. Monthly Bill
€80.72
Energy (P1 / P2 / P3)
0.249 / 0.169 / 0.15
€/kWh
Potencia (P1 / P2)0.082011 / 0.008096 €/kW
Solar Export0.03 €/kWh
Fixed FeeNone

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