Eres Energía vs Energía XXI
Live Comparison • juillet 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
Not enough tariff data available to calculate a typical monthly bill comparison.
Best Flat Rate
Eres Energía is the only provider offering a true 24-hour flat rate (0.099 €/kWh).
Best Time-of-Use Rate
Eres Energía is the only provider offering a fixed 3-period time-of-use rate.
Scorecard Comparison
| Metric (1-10) | Eres Energía | Energía XXI |
|---|---|---|
| Price Competitiveness | 7 | 5 |
| Solar Suitability | 5 | 3 |
| EV Suitability | 5 | 3 |
| Simplicity | 8 | 2 |
| Customer Service | 7 | 4 |
| Transparency | 8 | 2 |
Full Head-to-Head Comparison
Eres Energía
4.2 / 5 (300+ reviews)
Founded2018
Customers40,000+
Energy100% Renewable
Pros
- Simple and transparent pricing
- No permanence commitment
- 100% renewable energy
Cons
- Limited physical presence
- Fewer tariff varieties than larger providers
Available Tariffs
Eres Solar Flexible
Est. Monthly Bill€93.07
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)
0.1981 / 0.1253 / 0.0939
€/kWh
Potencia (P1 / P2)0.1597 / 0.1597 €/kW
Solar Export0.0304 €/kWh
Fixed FeeNone
Eres Tres
Est. Monthly Bill€69.80
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)
0.1995 / 0.1379 / 0.0986
€/kWh
Potencia (P1 / P2)0.0969 / 0.0379 €/kW
Solar ExportN/A
Fixed FeeNone
Eres Flexible
Est. Monthly Bill€76.76
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)0.0819 / 0.02 €/kW
Solar ExportN/A
Fixed FeeNone
Eres Sobresaliente
Est. Monthly Bill€66.56
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)0.099 €/kWh
Potencia (P1 / P2)0.099 / 0.099 €/kW
Solar ExportN/A
Fixed FeeNone
Eres Solar Tres
Est. Monthly Bill€117.16
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)
0.2095 / 0.1379 / 0.1088
€/kWh
Potencia (P1 / P2)0.2277 / 0.2277 €/kW
Solar Export0.0304 €/kWh
Fixed FeeNone
Eres Solar 24
Est. Monthly Bill€98.78
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)0.1449 €/kWh
Potencia (P1 / P2)0.1518 / 0.1518 €/kW
Solar Export0.0304 €/kWh
Fixed FeeNone
Energía XXI
1.2 / 5 (3,000+ reviews)
Founded2019
Customers3,000,000+
EnergyMixed (Regulated Market)
Pros
- Accès au Bono Social (réductions gouvernementales)
- Prix réglementés officiels (PVPC)
- Stabilité d'un grand groupe de services publics
Cons
- Faible transparence de facturation
- Prix unitaires cachés
- Pas de sécurité de prix fixe (prix horaires)
- Scores de satisfaction client bas
Available Tariffs
No active tariffs found.
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