Octopus Energy vs Alcanzia
Live Comparison • julio 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), Octopus Energy is the cheaper option. Their Octopus Relax tariff results in an estimated monthly bill of €66.41 (including taxes). This compares to Alcanzia's best option (Alcanzia Tarifa Fija) at €70.12 per month.
Octopus Energy Best Bill
€66.41
Alcanzia Best Bill
€70.12
* 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
Octopus Energy wins here. Their flat rate is 0.103 €/kWh compared to Alcanzia's 0.117208 €/kWh.
Best Time-of-Use Rate
Alcanzia has cheaper off-peak hours (0.077133 €/kWh vs 0.079 €/kWh).
Scorecard Comparison
| Metric (1-10) | Octopus Energy | Alcanzia |
|---|---|---|
| Price Competitiveness | 8 | 8 |
| Solar Suitability | 10 | 8 |
| EV Suitability | 10 | 7 |
| Simplicity | 9 | 9 |
| Customer Service | 9 | 7 |
| Transparency | 9 | 8 |
Full Head-to-Head Comparison
Octopus Energy
4.8 / 5 (16,000+ reviews)
Founded2015
Customers500,000+
Energy100% Renewable
Pros
- La mejor opción para propietarios de VE
- Excelente compensación solar
- Facturación clara y sin rodeos
- App muy bien valorada
- Atención al cliente de calidad
Cons
- Los precios de potencia son algo más altos que algunos competidores
- Ajustes de tarifas frecuentes pero pequeños
Available Tariffs
Octopus Solar
Est. Monthly Bill€74.31
Based on a typical profile: 3.6kW Potencia, 300kWh monthly usage (20% P1, 30% P2, 50% P3), plus standard IVA (21%), Electricity Tax (5.11%), and ~1€ meter hire.
Energy (P1 / P2 / P3)
0.209 / 0.118 / 0.093
€/kWh
Potencia (P1 / P2)0.093 / 0.093 €/kW
Solar Export0.035 €/kWh
Fixed FeeNone
Octopus 3
Est. Monthly Bill€67.44
Based on a typical profile: 3.6kW Potencia, 300kWh monthly usage (20% P1, 30% P2, 50% P3), plus standard IVA (21%), Electricity Tax (5.11%), and ~1€ meter hire.
Energy (P1 / P2 / P3)
0.184 / 0.098 / 0.079
€/kWh
Potencia (P1 / P2)0.093 / 0.093 €/kW
Solar ExportN/A
Fixed FeeNone
Octopus Go
Est. Monthly Bill€87.03
Based on a typical profile: 3.6kW Potencia, 300kWh monthly usage (20% P1, 30% P2, 50% P3), plus standard IVA (21%), Electricity Tax (5.11%), and ~1€ meter hire.
Energy (P1 / P2 / P3)
0.248 / 0.248 / 0.104
€/kWh
Potencia (P1 / P2)0.11 / 0.024 €/kW
Solar ExportN/A
Fixed FeeNone
Octopus Flexi
Est. Monthly Bill€73.43
Based on a typical profile: 3.6kW Potencia, 300kWh monthly usage (20% P1, 30% P2, 50% P3), plus standard IVA (21%), Electricity Tax (5.11%), and ~1€ meter hire.
Energy (P1 / P2 / P3)
0.224 / 0.16 / 0.136
€/kWh
Potencia (P1 / P2)0.076 / 0.002 €/kW
Solar ExportN/A
Fixed FeeNone
Octopus Relax
Est. Monthly Bill€66.41
Based on a typical profile: 3.6kW Potencia, 300kWh monthly usage (20% P1, 30% P2, 50% P3), plus standard IVA (21%), Electricity Tax (5.11%), and ~1€ meter hire.
Energy (24h)0.103 €/kWh
Potencia (P1 / P2)0.093 / 0.093 €/kW
Solar Export0.01 €/kWh
Fixed FeeNone
Alcanzia
4.1 / 5 (500+ reviews)
Founded2013
Customers50,000+
Energy100% Renewable
Pros
- Energía verde 100% certificada
- Opción de tarifas fijas planas o con discriminación horaria
- Sin compromiso de permanencia (habitualmente)
- Sólida oferta de batería virtual solar
Cons
- Precios de potencia ligeramente superiores a algunas marcas de descuento
- Enfoque principalmente en la interacción digital
- Menos conocida que los grandes actores nacionales
Available Tariffs
Tarifa Fija (3 Tramos)
Est. Monthly Bill€70.48
Based on a typical profile: 3.6kW Potencia, 300kWh monthly usage (20% P1, 30% P2, 50% P3), plus standard IVA (21%), Electricity Tax (5.11%), and ~1€ meter hire.
Energy (P1 / P2 / P3)
0.195564 / 0.116084 / 0.078378
€/kWh
Potencia (P1 / P2)0.101949 / 0.08553 €/kW
Solar ExportN/A
Fixed FeeNone
Tarifa Única
Est. Monthly Bill€75.06
Based on a typical profile: 3.6kW Potencia, 300kWh monthly usage (20% P1, 30% P2, 50% P3), plus standard IVA (21%), Electricity Tax (5.11%), and ~1€ meter hire.
Energy (24h)0.12512 €/kWh
Potencia (P1 / P2)0.101949 / 0.08553 €/kW
Solar ExportN/A
Fixed FeeNone
Tarifa Doméstica
Est. Monthly Bill€71.04
Based on a typical profile: 3.6kW Potencia, 300kWh monthly usage (20% P1, 30% P2, 50% P3), plus standard IVA (21%), Electricity Tax (5.11%), and ~1€ meter hire.
Energy (24h)0.118103 €/kWh
Potencia (P1 / P2)0.08893 / 0.08893 €/kW
Solar ExportN/A
Fixed FeeNone
Alcanzia Tarifa Doméstica (hasta 5.000 kWh)
Est. Monthly Bill€70.70
Based on a typical profile: 3.6kW Potencia, 300kWh monthly usage (20% P1, 30% P2, 50% P3), plus standard IVA (21%), Electricity Tax (5.11%), and ~1€ meter hire.
Energy (24h)0.117208 €/kWh
Potencia (P1 / P2)0.08893 / 0.08893 €/kW
Solar ExportN/A
Fixed FeeNone
Alcanzia Tarifa Fija
Est. Monthly Bill€70.12
Based on a typical profile: 3.6kW Potencia, 300kWh monthly usage (20% P1, 30% P2, 50% P3), plus standard IVA (21%), Electricity Tax (5.11%), and ~1€ meter hire.
Energy (P1 / P2 / P3)
0.195109 / 0.115278 / 0.077133
€/kWh
Potencia (P1 / P2)0.101949 / 0.08553 €/kW
Solar ExportN/A
Fixed FeeNone
Alcanzia Tarifa Única
Est. Monthly Bill€74.71
Based on a typical profile: 3.6kW Potencia, 300kWh monthly usage (20% P1, 30% P2, 50% P3), plus standard IVA (21%), Electricity Tax (5.11%), and ~1€ meter hire.
Energy (24h)0.124203 €/kWh
Potencia (P1 / P2)0.101949 / 0.08553 €/kW
Solar ExportN/A
Fixed FeeNone
Alcanzia Tarifa Doméstica (más de 5.000 kWh)
Est. Monthly Bill€76.08
Based on a typical profile: 3.6kW Potencia, 300kWh monthly usage (20% P1, 30% P2, 50% P3), plus standard IVA (21%), Electricity Tax (5.11%), and ~1€ meter hire.
Energy (24h)0.131308 €/kWh
Potencia (P1 / P2)0.08893 / 0.08893 €/kW
Solar ExportN/A
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