Solar farm for sale in Spain: buy an operating plant or build, payback and permits

An operating solar farm in Spain sold for about €650,000 per megawatt in 2026, a ready-to-build project for €10,000–60,000 per MW without land, and building costs €0.55–0.75 per watt.

The main risk is the power price: in 2025 solar sold at €36/MWh, almost half the market average, so a merchant plant takes over 20 years to pay back.

Looking at a solar farm for sale in Spain, or at building one?

Below: what an operating plant and a project cost, what you are actually buying, what construction costs, which permits are needed and why the grid connection point is the real bottleneck, what a plant earns on the market, under a PPA and under the old regulated regime, how it is taxed and what to check before buying.

The page includes a payback calculator with an illustrative 1 MW plant.

What an operating solar farm costs

Public listings are scarce: Spanish solar plants change hands through brokers and funds.

The benchmark comes from the nTeaser deal database (published by pv magazine España in April 2026): in the first quarter of 2026 operating plants were offered at €552,000–760,000 per MW, with a median of about €650,000, and transactions did not go below that level.

This is a correction: in early 2024 buyers paid about €1.1m per MW, in mid-2025 about €785,000.

Ready-to-build projects, fully permitted but not built, went for €10,000–61,000 per MW, median about €38,000.

We reviewed listings on milanuncios and Wallapop (October 2026): we found 10 sellers with a price and more than 25 buyers («compramos fotovoltaicas», from private investors to utilities). Good plants sell without a public listing.

These are asking prices, and the spread is huge for two reasons.

The first is the income regime: a small plant with regulated income costs 2–6 times more per megawatt than a merchant one.

The second is packaging: in one Alicante listing, a plot with an approved 500 kW connection costs €150,000, while the same plot «turnkey» with design, permits and a company costs €800,000.

What you buy with a solar plant

A plant is not just panels but a bundle of rights, and the price depends on which of them are in the deal:

• The grid connection point. Access and connection permits are the scarcest asset a project has. Without them, land with panels is worth little.
• The land. Usually leased for 25–30 years or held under a surface right (derecho de superficie); less often owned. A 1 MW plant takes 1.2–2 ha.
• The revenue source. Selling on the market, a long-term PPA with an offtaker or the old regulated regime — this decides what the plant earns.
• The company. Larger plants are sold as a project company (SPV): the buyer takes over its contracts, permits and its liabilities.

What it costs to build a solar farm

The industry benchmark for ground-mounted plants in Spain is €0.55–0.75 per watt turnkey, i.e. €550,000–750,000 per MW.

Modules have fallen to about €0.10 per watt, so most of the cost is structures, inverters, labour and the line to the substation.

A plant of around 1 MW costs more per watt than a large one; for our calculation we use €0.70 per watt including the connection line.

Single-axis trackers, which turn the panels to follow the sun, cost more than fixed structures but produce 20–23% more energy.

Hence the key «buy or build» question: an operating plant at €650,000 per MW and a new one at €0.55–0.75 per watt cost roughly the same.

Buying, you pay for the connection and permits already being in place and for output known from actual data.

Building, you save the seller’s margin but take on two to five years of permitting and the risk of not getting there.

Which permits a solar farm needs

• Who authorises. Plants above 50 MW are authorised by the State (the Ministry for the Ecological Transition), plants up to 50 MW by the autonomous community (art. 3.13.a Ley 24/2013). The procedure is three successive authorisations: prior (AAP), construction (AAC) and operation (AAE) under RD 1955/2000.
• The connection point is the bottleneck. To apply for grid access, a generator must lodge a guarantee of €40 per kW (art. 23 RD 1183/2020). Access and connection permits lapse if the plant has not obtained its operating authorisation within five years (art. 26). At nodes where capacity is released, it can be allocated by tender rather than first come, first served. That is why connection rights are sold separately: listings ask €80,000–150,000 for 500 kW.
• Environmental assessment. An ordinary assessment applies to ground-mounted plants over 100 ha, and over 10 ha in protected natural areas; a simplified one to other ground-mounted plants, except those under 5 ha; rooftop plants are on neither list (Annexes I and II, Ley 21/2013). Plants of 1–2 MW usually need no assessment under national law, although an autonomous community may add its own requirements.
• Valencian Community. A plant on non-developable land needs a specific siting authorisation (Decreto-ley 14/2020); plants are banned in natural parks, nature reserves and protected landscapes.
• Andalusia. The regional land law (Ley 7/2021, LISTA) treats renewables as an ordinary use of rural land: a municipal licence is needed, without the prior authorisation for «extraordinary» uses; a land restoration guarantee still applies.

A rooftop plant on a warehouse for its own consumption is a different regime.

Self-consumption is governed by RD 244/2019: installations up to 100 kW can use simplified surplus compensation, and self-consumption with surplus up to 100 kW is exempt from the connection guarantee (art. 23.2 RD 1183/2020).

It cuts the warehouse’s power bill rather than being a power-selling business, and should be assessed as a cost saving.

Is owning a solar farm profitable

Revenue is output multiplied by the price the plant gets for its energy. Both need checking separately.

Output. According to the European Commission’s PVGIS model, one kilowatt of panels on a fixed structure produces about 1,720 kWh a year in Almería, 1,670 in Seville, 1,655 in Albacete, 1,620 in Madrid and Zaragoza, 1,560 in Valladolid and about 1,310 in Galicia; a tracker adds 20–23%.

This is a climate model: for an operating plant, use its actual production reports.

Market price. The average Spanish day-ahead price in 2025 was €65.29/MWh, but for 797 hours of the year the price was zero or negative — almost always in daytime, when solar plants run.

That is why solar earns less than average: according to the industry association UNEF, the average price captured by solar plants was €36.39/MWh in 2025 and €29.68/MWh in the first half of 2026.

This is called cannibalisation: the more solar in the system, the cheaper its own midday.

2026 showed that solar barely benefits when the market rises.

The average price from January to 18 October 2026 was about €79/MWh, €143/MWh in September because of gas, and there have already been 924 hours at zero or below.

By our calculation on a PVGIS output profile, a fixed-panel plant captured about €29/MWh in 2026, i.e. 37% of the market average, and a tracker plant about €40.

PPA. A long-term power purchase agreement fixes the price for 10–15 years and removes market risk, but Spanish solar PPA prices have fallen to €30–35/MWh (LevelTen index, 2025 to early 2026).

A 1 MW plant will struggle to find a PPA buyer: such contracts are signed for tens of megawatts.

The old regulated regime. Plants built in 2008–2012 under the former feed-in premiums receive regulated income on top of the market price — a retribución a la inversión per MW.

It is set so that a standard plant earns a «reasonable return»: 7.398% for plants that had a premium before the 2013 reform — frozen until the end of 2031 — and 7.09% for the rest.

Parameters for 2026–2031 were approved by Orden TED/53/2026, which estimates the 2026 market price at €61.65/MWh.

The income is paid until the end of the regulatory useful life — 30 years for photovoltaics — and the parameters, except that life and the standard investment value, are reviewed every six years.

Buying such a plant, you are not buying 7.398% on your purchase price but a stream of payments until the end of the 30-year life: for a 2010 plant it ends around 2040, after which it becomes an ordinary merchant plant.

That is why small regulated plants are listed at €1.8–4.3m per MW.

Example: a 20 kW plant near Albacete with €12,000 a year of income and 12 years of regulated regime left is listed at €85,000 — but only together with its plot for another €85,000.

Solar farm payback calculator

The calculator holds an illustrative 1 MW plant on leased land in the south or centre of the country, without regulated income.

Ready-to-build project rights cost €40,000 and construction €700,000. Output is 1,650 MWh a year at €36/MWh, the 2025 solar average: revenue of €59,400 a year, €4,950 a month.

Revenue-linked costs (market representative, generation charge, generation tax) are 5%; there are no staff; land rent is €300 a month; operation and maintenance, insurance, security, the gestor and IBI come to €1,500 a month.

Pre-tax profit is €34,830 a year, after tax about €28,200, and the €740,000 investment pays back in about 26 years.

The whole result rests on the power price.

At €30/MWh, as in the first half of 2026, payback is 36 years, longer than the plant’s life; at €45 it is 19 years; at €60, 13 years.

A tracker plant producing 2,000 MWh at about €38 pays back in around 20 years, and an operating plant bought at €650,000 at €36 in 23 years.

The model leaves out depreciation, which lowers tax, but also panel degradation, inverter replacement and curtailment ordered by the grid operator.

For a 30-year asset, payback is a crude measure: it ignores when the money arrives and what it is worth.

A solar plant is compared with other investments by net present value (NPV) and internal rate of return (IRR).

In our example the 30-year IRR is below 1% at €36 and about 7% at €60.

How to read the payback figure itself is covered in Payback period, and a model with hourly prices, degradation, debt and price scenarios is built as a financial model.

How a solar farm is taxed

• VAT (IVA). Electricity sales are taxed at the standard 21% rate (art. 90 Ley 37/1992); the company recovers VAT on construction. The sale of an entire going concern is not subject to VAT (art. 7.1).
• Electricity generation tax (IVPEE). The rate is 7% of everything the plant receives for its output, regulated income included (Ley 15/2012). In 2026 the tax base is reduced quarter by quarter, in 2027 the rate is 3.5%, and from 2028 it is 0% (RD-ley 18/2026, ratified by Congress on 23.07.2026; it is still being processed as a bill).
• IAE. Solar generation falls under heading 151.4; companies with turnover below €1m are exempt (art. 82.1.c TRLRHL).
• IBI. Power generation facilities are recorded in the Cadastre as special-characteristics property (BICE, art. 8 TRLCI); the default IBI rate for them is 0.6%, and a municipality may set 0.4–1.3% (art. 72.2 TRLRHL). Check how the plant is registered in the Cadastre and what IBI it pays: it is a fixed cost for decades.
• SL. A plant is usually held in a company, which pays corporate tax: in 2026, with turnover under €1m, 19% on the first €50,000 of profit and 21% above. How to take profit out is covered in Salary or dividends from a Spanish SL.

What to check before buying a solar farm

1. Connection and permits. Whether access and connection permits exist, for what capacity, when they were granted and whether the project will meet the five-year deadline; which of the AAP, AAC and AAE authorisations are already issued.
2. Land. The lease or surface right: a term no shorter than the plant’s life, renewal and dismantling terms, who pays IBI. For a rooftop plant, the roof lease and the condition of the building itself.
3. Revenue regime. Market, PPA or regulated. For a regulated plant, the standard-plant code, the retribución a la inversión and the year its 30-year life ends; for a PPA, the price, term, offtaker credit and what happens at negative prices.
4. Actual output. Monthly reports for 3–5 years and settlements with the market representative, a comparison with PVGIS, curtailment hours — ordered by the operator and due to negative prices.
5. Equipment. Modules and inverters, manufacturer warranties, the O&M contract, insurance; when the inverters are due for replacement.
6. Company and liabilities. Buying a plant as a going concern, the buyer is liable for the seller’s tax debts (art. 42.1.c LGT) unless it obtains a tax certificate before the deal (art. 175.2 LGT); buying the project company, it takes on all its debts and disputes. Get Tax Agency and Social Security certificates and check past IVPEE and IBI.

A plant or project company is checked before signing through due diligence: legal, permits, contracts and a financial model for the plant’s whole life.

If you are moving to Spain for this business

A non-resident can buy a plant or the company that owns it.

But a non-EU citizen can live in Spain only with a residence permit, and the honest answer for a solar farm is that it fits a permit poorly.

The usual route for your own business is a self-employment permit, for one year at first, and it is granted for an activity you run yourself, with a business plan and, as a rule, with jobs.

A solar plant is run by a contractor; there is hardly any work in it for the owner or for employees. How that permit works is covered by Relotus in «Cuenta propia in Spain».

The golden visa has been abolished, and the startup visa does not suit a business of this kind.

A residence permit without the right to work requires proven funds or passive income and does not allow you to work — whether plant income counts towards it is for an immigration lawyer to decide before you buy, not after.

Frequently asked questions

How much does a solar farm cost in Spain?

In the first quarter of 2026 operating plants were offered at €552,000–760,000 per MW, median about €650,000. A ready-to-build project without land costs €10,000–61,000 per MW. Small plants with old regulated income are listed at €1.8–4.3m per MW.

Is owning a solar farm in Spain profitable?

It depends on the power price and the revenue regime. A 1 MW plant selling on the market at €36/MWh, the 2025 solar average, pays back in 26 years in the illustrative example. Regulated plants from 2008–2012 earn more, but their income ends with the 30-year regulatory life.

How much does it cost to build a 1 MW solar farm in Spain?

The benchmark is €0.55–0.75 per watt turnkey, i.e. €550,000–750,000 per MW; a plant of around 1 MW is usually near the top of the range. Add connection rights and permits if you buy a ready project rather than obtain them yourself.

How much energy does 1 MW of solar produce in Spain?

According to PVGIS, about 1,600–1,720 MWh a year in the south and centre on a fixed structure, about 1,310 MWh in Galicia. A tracker adds 20–23%. For an operating plant, what matters is actual output from its reports, not the model.

Why does the grid connection point matter so much?

Spare grid capacity is scarce, an access permit requires a €40 per kW guarantee and lapses if the plant is not running within five years. Without a connection point, a plot with a project is worth little, which is why connection rights are sold separately.

What is solar price cannibalisation?

When the grid has a lot of solar, daytime prices fall to zero and below. In 2025 there were 797 such hours, and solar captured an average of €36/MWh against a market average of €65. The more plants are built, the lower the price in their working hours.

Does a solar farm pay the electricity generation tax?

Yes, IVPEE is 7% of generation income. In 2026 the base is reduced, in 2027 the rate is 3.5%, and from 2028 it is 0%. The law that set this is still being processed as a bill, so check the schedule on the date of the deal.

Key points about solar farms in Spain

• An operating plant costs about €650,000 per MW, a ready-to-build project without land about €38,000, construction €0.55–0.75 per watt.
• The bottleneck is the grid connection point: permits require a €40 per kW guarantee and lapse after five years.
• Solar sells power at almost half the market price: €36/MWh in 2025 and about €30 in 2026.
• A merchant plant without regulated income pays back in 26 years in the example; regulated plants cost more and their income ends with the 30-year life.
• A passive plant fits a self-employment residence permit poorly.

Sources

• Ley 24/2013 (art. 3 and final provision 3 bis) — BOE; RD 1183/2020 (grid access and connection) — BOE; Ley 21/2013 (environmental assessment) — BOE; RD 244/2019 (self-consumption) — BOE.
• Orden TED/53/2026 (regulated parameters 2026–2031) — BOE.
• Ley 15/2012 (IVPEE) — BOE; RD-ley 18/2026 — BOE, ratification — BOE; Ley 37/1992 (VAT) — BOE; TRLRHL — BOE; TRLCI — BOE; LGT — BOE.
• Market prices — REE, OMIE annual report 2025; output — PVGIS.
• UNEF Annual Report 2026 — Energías Renovables; plant and project prices (nTeaser) — pv magazine España.
• Listings of plants and projects for sale — milanuncios, Wallapop, October 2026.