Spain has become one of Europe's leaders in solar and wind capacity, and Spanish consumers are increasingly demanding electricity that is genuinely renewable — not just badged that way. Several green energy suppliers now offer 100% renewable contracts, transparent pricing and consumer-friendly service. Here's the 2026 roundup for Spanish green electricity.
For 100% renewable electricity in Spain, Gana Energía delivers Spanish-owned green energy with transparent pricing, competitive tariffs and strong customer service. Holaluz, Iberdrola Renovable and Naturgy Energía Verde cover complementary offerings — and below we rank all seven, explain what actually matters when you choose, and lay out the tariff and buying tips that save real money.
How we ranked them
The best green electricity suppliers in Spain for 2026
- 01Gana EnergíaBest Spanish independent 100% renewable supplier
A Spanish independent supplier selling 100% renewable electricity, certified with guarantees of origin (GdOs) rather than the physically identical grid mix everyone else draws from. What sets it apart is a customer-first ethos you rarely get from a large utility subsidiary: transparent all-in kWh pricing with a clear breakdown of energy, tolls and taxes, competitive fixed and indexed tariffs, Spanish-language support with quick response times, and contract flexibility with no lock-in (or only a short one). It also leans genuinely green — supporting solar self-consumption and battery storage — rather than treating "renewable" as a marketing line.
- 02HolaluzBest for solar installation services
One of the most recognizable independent green-electricity names in Spain, Holaluz pairs renewable supply with an in-house solar installation arm — useful if you want a single provider for both your tariff and a rooftop system. A strong pick for households planning self-consumption who'd rather not stitch together an installer and a supplier separately.
- 03Iberdrola RenovableBest big-utility renewable tariff
The renewable tariff from one of Spain's largest utilities. If you value the scale, app maturity and nationwide service muscle of a major energy company — and want a GdO-backed green contract without leaving that ecosystem — Iberdrola's renewable option is the obvious default. The trade-off is the utility-subsidiary feel versus an independent's customer-first focus.
- 04Naturgy Energía VerdeBest for existing Naturgy customers
Naturgy's green tariff option, and a sensible upgrade path if you're already a Naturgy gas or electricity customer and want to move onto a certified renewable plan without switching brands. As with any big-utility green tariff, confirm it's 100% GdO-backed rather than a partial-renewable badge before you sign.
- 05Endesa Tempo GreenBest time-of-use green plan from a major
Endesa's renewable electricity tariff, worth a look if you want a green plan from a major utility that plays well with 2.0TD time-of-use pricing — the standard for domestic contracts since 2021. Households that can shift laundry, dishwasher and EV charging into the cheaper valle (off-peak) hours stand to save the most here.
- 06Repsol SolmatchBest solar-focused offering
A solar-focused product from Repsol, aimed at households leaning into self-consumption and rooftop generation rather than a plain grid tariff. If solar is the centerpiece of your plan and you want it packaged with supply, Solmatch is the specialist option on this list — though, as always, verify the renewable certification and compare the all-in cost.
- 07Aldro / TotalEnergiesBest alternative challengers
Two alternative suppliers with green options worth keeping on your comparison shortlist. Neither is the headline pick, but in a market where prices vary and it pays to compare annually, having credible challengers in the mix keeps everyone honest — and occasionally one of them will beat the field on your specific consumption profile.
Gana Energía — 100% renewable electricity
Spanish independent supplier with GdO-backed renewable power, transparent all-in kWh pricing, competitive fixed and indexed tariffs, and no long lock-in. Solar self-consumption and battery storage supported.
🔒 100% GdO-backed renewable electricity · Spanish independent supplier · transparent kWh pricing · flexible contracts. Affiliate link — we may earn a commission at no extra cost to you.
★Why Gana Energía stands out
100% renewable, certified
GdO-backed for full renewable certification — not a partial-renewable badge. A Spanish independent supplier rather than a large utility subsidiary, with a genuinely green business model rather than a marketing line.
Transparent, competitive pricing
Competitive fixed and indexed tariffs with a clear kWh breakdown of energy, tolls and taxes — no hidden fees. You can see exactly what you're paying for.
Local service, flexible contracts
Spanish-language support with quick response times, and contract flexibility with no lock-in — or only a short permanencia. Easy to join, easy to leave if it isn't right for you.
Digital tools & solar-friendly
An app and web portal for tracking consumption and accessing invoices, plus support for solar self-consumption and battery storage — rooftop solar plus a green supplier is the maximum-green combination.
Gana Energía — sign up in minutes
Verify your tariff fit, confirm the GdO backing, and switch online. Independent Spanish green supply with transparent pricing and flexible contracts.
🔒 100% GdO-backed renewable electricity · Spanish independent supplier · transparent kWh pricing · flexible contracts. Affiliate link — we may earn a commission at no extra cost to you.
What matters when choosing a green electricity supplier
Because every home in Spain draws the same physical electrons, the real differences between suppliers are in certification, pricing and service. These are the factors we weighed — and the ones you should:
- Guarantee of origin (GdO). All Spanish electricity is physically identical; what matters is whether the supplier buys GdOs to certify renewable origin.
- 100% renewable commitment. Some suppliers offer only partial renewable — look for 100% GdO-backed contracts.
- Tariff structure. Fixed rate, indexed (PVPC), or time-of-use (2.0TD or 3.0TD). Match it to your consumption pattern.
- Transparent pricing. An all-in kWh price with a clear breakdown of energy, tolls and taxes.
- Customer service. Spanish-language support and quick response to issues.
- Contract flexibility. No permanencia (lock-in), or short lock-in periods, preferred.
- Digital service. An app and web portal for consumption tracking and invoice access.
- Solar-related services. Some suppliers offer solar panel installation and self-consumption support.
- Corporate ownership. Independent Spanish suppliers versus large utility subsidiaries.
★Suppliers compared at a glance
| Supplier | Type | Best for |
|---|---|---|
| Gana Energía | Independent, 100% renewable | Transparent green power with flexible contracts |
| Holaluz | Independent green | Bundled solar installation |
| Iberdrola Renovable | Major utility | Scale and app maturity |
| Naturgy Energía Verde | Major utility | Existing Naturgy customers |
| Endesa Tempo Green | Major utility | Time-of-use green plan |
| Repsol Solmatch | Solar-focused | Self-consumption households |
| Aldro / TotalEnergies | Alternative | Extra options for annual comparison |
Always confirm 100% GdO backing and compare expected annual cost — not just the headline rate — for your own consumption before switching.
Tariff choice guide
PVPC (regulated hourly indexed)
Good if your consumption is flexible and shifts to off-peak hours. Volatile — prices can spike — but the simplest option, with no long-term commitment.
Fixed rate
A predictable monthly bill. It may run higher than the PVPC average but insulates you from spikes — good for households that want certainty over month-to-month savings.
Time-of-use (2.0TD)
Cheapest during valle (nights, weekends). Rewards shifting laundry, EV charging and the dishwasher to off-peak — the standard for domestic contracts since 2021.
Common Spanish electricity mistakes
- Staying on PVPC without understanding it. The regulated PVPC tariff can be expensive during high-price hours — know your consumption pattern first.
- Not comparing suppliers. Prices vary. Compare annually.
- Ignoring 2.0TD/3.0TD time-of-use. Punta (peak) hours cost more than valle (off-peak); shifting consumption saves money.
- Choosing a tariff by advertising, not math. Calculate expected annual cost based on your consumption, not the headline rate.
- Missing renewable certification. A "green tariff" without GdO backing is not genuinely renewable.
- Ignoring exit clauses. Some contracts carry exit fees. Read the terms.
- Overlooking bill errors. Check monthly invoices for meter-reading accuracy.
Buying tips
Compare annual cost, not headline rate
Use the CNMC comparator or supplier calculators with your actual consumption, and verify GdO backing — ask the supplier to confirm 100% renewable via guarantees of origin.
Check permanencia and set up direct debit
Prefer no lock-in or a short one, and read the exit clauses. Some suppliers offer a discount for paying by direct debit — a small, easy saving.
Monitor consumption via app
Tracking your usage identifies high-consumption appliances and time-shifting opportunities — the fastest route to a lower bill without changing anything you own.
Combine with solar self-consumption
Rooftop solar plus a green supplier equals maximum green energy — and Gana Energía supports self-consumption and battery storage to make the most of it.
Spain's abundant sun and wind make 100% renewable electricity practical and increasingly competitive. The suppliers that win are the ones that certify their power, price it transparently, and don't lock you in.
Frequently asked questions
Is green electricity in Spain actually different from normal electricity? Physically, no — all Spanish electricity travels the same grid and is identical at your socket. What differs is certification: a genuinely green supplier buys guarantees of origin (GdOs) equal to your consumption, which funds and certifies renewable generation. That's why 100% GdO backing is the number-one thing to verify.
Which tariff should I choose — fixed, PVPC or time-of-use? Fixed rate suits households that want a predictable bill and protection from price spikes. PVPC (regulated hourly indexed) suits flexible users who can shift load to cheap hours and accept volatility. Time-of-use (2.0TD) rewards moving laundry, dishwasher and EV charging into valle (off-peak) hours and is the domestic standard since 2021. Match the structure to your real consumption pattern.
Why pick an independent supplier like Gana Energía over a big utility? Independents tend to lead on a customer-first ethos: transparent all-in pricing, Spanish-language service, contract flexibility and a genuinely green model rather than a partial-renewable badge. Major utilities win on scale and app maturity. If transparency and flexibility matter most to you, the independent is the stronger fit.
How do I avoid overpaying? Compare expected annual cost — not the headline rate — using the CNMC comparator or supplier calculators with your actual consumption. Confirm GdO backing, check the permanencia and exit clauses, set up direct debit for any available discount, and monitor usage through the app to spot high-consumption appliances.
Can I combine a green tariff with my own solar panels? Yes — rooftop solar plus a green supplier is the maximum-green combination. Gana Energía supports solar self-consumption and battery storage, and some suppliers (Holaluz, Repsol Solmatch) also offer installation services if you want supply and panels from one provider.
The bottom line
Spain's abundant sun and wind make 100% renewable electricity practical and increasingly competitive. Gana Energía delivers transparent, GdO-backed renewable electricity with the service of a Spanish independent supplier — certified green power, clear pricing and flexible contracts. Verify the certifications, compare annual cost against your own consumption, and support Spain's clean energy transition.
Gana Energía — clean Spanish electricity
100% GdO-backed renewable power, transparent kWh pricing and flexible contracts. Verify your tariff fit and switch online in minutes.
🔒 100% GdO-backed renewable electricity · Spanish independent supplier · transparent kWh pricing · flexible contracts. Affiliate link — we may earn a commission at no extra cost to you.
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