Solar for business · Spain
20 kW solar panels for businesses: price and payback 2026
20 kWp of solar panels for a company cost €17,300–20,700 excl. VAT in 2026 (€0.94 per watt). In Madrid they produce about 33,140 kWh a year; for a company using 41,400 kWh a year they pay back in about 6 years.
SolarPlan price index · data as of 28 September 2026
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Configuration
- Price, turnkey
- €17,300–20,700Excl. VAT, before subsidies
- Production
- 33,140 kWh a yearNear Madrid, south-facing at 34°
- Payback
- 6 yearsAt 41,400 kWh of use a year
- Roof needed
- 150 m²46 panels of 440 W
Configuration
A typical installation of this size. Companies adapt it to your roof and your connection.
- System size
- 20 kWp
- Solar panels
- 46 × 440 W
- Panel area / roof
- 90 m² of panels, about 150 m² of roof
- Mounting
- Flat roof, south-facing racks
- Inverter
- On-grid, 20 kW, three-phase
- Production
- About 33,140 kWh a year
Price ranges, 2026
Turnkey: panels, inverter, mounting, cabling, installation and the grid paperwork. Low and high ends follow brands and roof difficulty.
| Configuration | Price (Excl. VAT (a company recovers it)) | Per watt |
|---|---|---|
| 20 kW, no battery | €17,300–20,700 | €0.94 |
SolarPlan model prices from the market data of 28 September 2026, not a quote. Real offers depend on the roof, the brands and the company. Method and downloads: the SolarPlan price index
Savings and payback
For a company working on weekdays using 41,400 kWh a year, the system saves about €3,260 in the first year and pays back in about 6 years. About 65% of the production is used on site; the rest goes to the grid at the surplus price.
No subsidies, no price increases beyond the market module's escalation; the plan for your roof uses your own bill.
Production by place
Yearly production of 20 kW, south-facing at the best fixed tilt, from SolarPlan's solar model (multi-year satellite averages).
| Place | Per kW a year | 20 kW a year |
|---|---|---|
| Valencia | 1,629 kWh | 32,580 kWh |
| Alicante | 1,608 kWh | 32,160 kWh |
| Castellón | 1,636 kWh | 32,720 kWh |
| Seville | 1,712 kWh | 34,240 kWh |
| Málaga | 1,705 kWh | 34,100 kWh |
| Barcelona | 1,557 kWh | 31,140 kWh |
| Community of Madrid | 1,657 kWh | 33,140 kWh |
| Region of Murcia | 1,657 kWh | 33,140 kWh |
Financing that fits
- Companies: free depreciation of the installation (corporate tax) for systems that start operating in 2026, up to €500,000 of investment.
Companies in Spain
639 installation companies work here
- ️ ARF Solar· Granada
- +3Sol Energía Solar· Los Palacios y Villafranca
- 1KOMMA5° España· Cerdanyola del Vallès
- 30Surenergy· Paiporta
- A2 Electricidad· Oviedo
- a2 Renovables· Talavera de la Reina
- A3 Energia· Úbeda
- Abad Energía· Quintanar de la Orden
Names from public sources (company websites and directories), so you can see who works in your area. They become SolarPlan partners only after we check them. How we verify companies
Send your plan to up to 5 of themQuestions
How much does a 20 kW solar plant cost in 2026?
20 kW, no battery: €17,300–20,700. Excl. VAT (a company recovers it), turnkey, before subsidies (SolarPlan price index, data as of 28 September 2026).
How many panels does a 20 kW system need, and how much roof?
About 46 panels of 440 W (90 m² of panels) — roughly 150 m² of flat company roof.
How much electricity does a 20 kW system produce a year?
About 33,140 kWh near Madrid. By place: from 31,140 kWh in Barcelona to 34,240 kWh in Seville.
How long does a 20 kW system take to pay back?
About 6 years for a company working on weekdays using 41,400 kWh a year, without subsidies; first-year savings about €3,260.
Why are business prices without VAT?
A company recovers the VAT, so business prices and savings are shown without it. Payback is computed on the non-household tariff for a company using 41,400 kWh a year, working on weekdays.
Single-phase or three-phase?
A 20 kW system normally uses a three-phase inverter. The company checks your connection (and the permitted power) before quoting.
Neighbouring configurations
Guides
Key figures
Updated 28 September 2026
- Home solar system without a battery: 3 kW €4,300–5,200; 4 kW €5,100–6,100; 5 kW €5,900–7,100; 6 kW €6,700–8,000 (installed, VAT included).
- With a battery: 5 kWp + 10 kWh €11,600–13,900 (VAT included).
- Price per installed watt: €1.21–1.57 (mid of the range, by size).
- Sun yield: 1,557–1,712 kWh per kWp a year (Barcelona – Seville).
- Payback of a 5 kWp system at 6,600 kWh a year: about 9 years, without subsidies.
- Electricity price used (PVPC average): €0.18 per kWh.
- National IRPF deduction: 40% of the cost, up to €3,000 (works finished in 2026, with energy certificates).
The same figures on every SolarPlan page, in the Markdown versions, in llms.txt and in the MCP tools. How the price index works