Energía XXI Review
Energía XXI is the 'Comercializadora de Referencia' belonging to the Endesa group. It operates exclusively in the regulated market, offering the PVPC (regulated price) and managing the Bono Social for vulnerable consumers.
Not sure if the regulated market is right for you? Read our Regulated vs. Free Market comparison guide.
1.2/5
3,000+ reviews
2019
Madrid, Spain
Mixed (Regulated Market)
3,000,000+
Supplier Scorecard
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The Regulated Branch
Following the deregulation of the Spanish energy market, large groups were forced to separate their free-market brands (like Endesa) from their regulated-market brands. Energía XXI was created to serve this specific role for Endesa.
As a regulated provider, they do not set their own energy prices; instead, they apply the prices determined by the wholesale market and the government's regulated tolls and charges.
In 2026, they remain one of the largest providers by customer volume, primarily due to households remaining on the PVPC or requiring the Bono Social discount.
Regulated Tariffs
Tariffs updated May 2026. Rates include regulated costs.
| Tariff Name | Type | P1 (€/kWh) | P2 | P3 | Potencia |
|---|---|---|---|---|---|
PVPC Regulated market rate (Variable hourly) | indexed | €0.0000 | — | — | €0.0000 |
Editor's Note: The Billing Challenge
Our editorial team highlights a significant transparency issue with Energía XXI billing. Unlike many free-market providers, their invoices often clump costs in a way that makes it difficult to see the actual price you are paying per kWh.
What we like
- Access to the Bono Social (government discounts)
- Official regulated prices (PVPC)
- Stability of a large utility group
What to watch for
- Poor billing transparency
- Hidden unit prices (clumped with tolls)
- No fixed-price security (prices change every hour)
- Low customer satisfaction scores
Who should avoid Energía XXI?
"Users who prefer consistent, predictable monthly billing or those who are uncomfortable with the hourly price volatility of the PVPC market."
Editor's Note: Honest assessment for better matching.
Frequently Asked Questions
Can I get a fixed price with Energía XXI?
What is the Bono Social?
Go to Official Site
Direct link to provider's official website.
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