Eres Energía vs Niba
Live Comparison • juli 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), Eres Energía is the cheaper option. Their Eres Sobresaliente tariff results in an estimated monthly bill of €66.56 (including taxes). This compares to Niba's best option (niba Solar) at €69.88 per month.
Eres Energía Best Bill
€66.56
Niba Best Bill
€69.88
* 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
Eres Energía wins here. Their flat rate is 0.099 €/kWh compared to Niba's 0.115 €/kWh.
Best Time-of-Use Rate
Niba has cheaper off-peak hours (0.089 €/kWh vs 0.0939 €/kWh).
Scorecard Comparison
| Metric (1-10) | Eres Energía | Niba |
|---|---|---|
| Price Competitiveness | 7 | 9 |
| Solar Suitability | 5 | 8 |
| EV Suitability | 5 | 7 |
| Simplicity | 8 | 9 |
| Customer Service | 7 | 8 |
| Transparency | 8 | 9 |
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
Niba
4.1 / 5 (150+ reviews)
Founded2025
Customers10,000+
Energy100% Renewable
Pros
- Gesteund door de infrastructuur en stabiliteit van Iberdrola
- Zeer concurrerend vast tarief ({rate})
- Geen vaste contractduur / boetevrij overstappen
- 100% groenestroomcertificaten
- Eenvoudige digitale aanmelding en beheer
Cons
- Klantenservice is voornamelijk digitaal gericht
- Kortere geschiedenis in vergelijking met traditionele gevestigde namen
Available Tariffs
niba Solar
Est. Monthly Bill€69.88
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)0.115 €/kWh
Potencia (P1 / P2)0.089 / 0.089 €/kW
Solar Export0.06 €/kWh
Fixed FeeNone
niba Zen
Est. Monthly Bill€69.88
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)0.115 €/kWh
Potencia (P1 / P2)0.089 / 0.089 €/kW
Solar Export0.06 €/kWh
Fixed FeeNone
niba Tres
Est. Monthly Bill€71.71
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 (P1 / P2 / P3)
0.196 / 0.169 / 0.089
€/kWh
Potencia (P1 / P2)0.079 / 0.059 €/kW
Solar Export0.06 €/kWh
Fixed FeeNone
niba Flex
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 Export0.06 €/kWh
Fixed FeeNone
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