Factor Energía 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), Som Energia is the cheaper option. Their Som - Tarifa Periodos tariff results in an estimated monthly bill of €80.72 (including taxes). This compares to Factor Energía's best option (Tarifa Fija Precio Único) at €101.90 per month.

Factor Energía Best Bill
€101.90
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

Factor Energía is the only provider offering a true 24-hour flat rate (0.1879 €/kWh).

Best Time-of-Use Rate

Som Energia has cheaper off-peak hours (0.15 €/kWh vs 0.1922 €/kWh).

Scorecard Comparison

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

Full Head-to-Head Comparison

Factor Energía

Factor Energía

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

Pros

  • Primer proveedor independiente en España
  • Energía 100% verde certificada
  • Excelente app móvil para seguimiento de consumo
  • Estructura de facturación muy transparente

Cons

  • Tiempos de espera en atención al cliente en horas punta
  • Las tarifas fijas pueden ser ligeramente superiores al mercado variable
  • Enfoque principal en la península

Available Tariffs

Factor Tarifa Respira

Est. Monthly Bill
€102.69
Energy (P1 / P2 / P3)
0.3177 / 0.2596 / 0.1922
€/kWh
Potencia (P1 / P2)0.075903 / 0.001987 €/kW
Solar ExportN/A
Fixed FeeNone

Tarifa Fija Precio Único

Est. Monthly Bill
€101.90
Energy (24h)0.1879 €/kWh
Potencia (P1 / P2)0.1041 / 0.1041 €/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

Find the absolute best supplier for your home

Don't rely on typical profiles. Upload your real bill and our AI will calculate exactly which supplier is cheaper for your actual energy usage.

Analyze My Bill Now