Energía XXI vs Plenitude

Live Comparison • July 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

Plenitude is the only provider offering a true 24-hour flat rate (0.097296 €/kWh).

Best Time-of-Use Rate

Neither provider currently offers a fixed time-of-use rate.

Scorecard Comparison

Metric (1-10)	Energía XXI	Plenitude
Price Competitiveness	5	8
Solar Suitability	3	7
EV Suitability	3	6
Simplicity	2	8
Customer Service	4	7
Transparency	2	8

Full Head-to-Head Comparison

Energía XXI

1.2 / 5 (3,000+ reviews)

Founded2019

Customers3,000,000+

EnergyMixed (Regulated Market)

Pros

Access to the Bono Social (government discounts)
Official regulated prices (PVPC)
Stability of a large utility group

Cons

Poor billing transparency
Hidden unit prices (clumped with tolls)
No fixed-price security (prices change every hour)
Low customer satisfaction scores

Available Tariffs

No active tariffs found.

Plenitude

4.6 / 5 (2,500+ reviews)

Founded2021

Customers300,000+

Energy100% Renewable

Pros

100% Certified renewable energy
Simple, stable fixed-price tariffs
Strong financial backing from Eni
No permanence or exit fees

Cons

Traditional customer service model
Prices can be higher than niche discounters
Focus is heavily on fixed-rate plans

Available Tariffs

Fácil Luz

Est. Monthly Bill

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.

€66.18

Energy (24h)0.097296 €/kWh

Potencia (P1 / P2)0.099984 / 0.099984 €/kW

Solar ExportN/A

Fixed FeeNone

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