Valencian Community · Spain
What a home solar system costs in Castellón, the tax bonuses that apply here, how much it produces and who installs in the area.
Open programmes for homes in Castellón, each checked against its official source.
Typical configurations, priced from the SolarPlan price index; production at Castelló de la Plana.
| Configuration | Price | Production a year |
|---|---|---|
| 3 kW, no battery | €4,300–5,200 | 4,910 kWh |
| 4 kW, no battery | €5,100–6,100 | 6,540 kWh |
| 5 kW, no battery | €5,900–7,100 | 8,180 kWh |
| 5 kW + 10 kWh battery | €11,600–13,900 | 8,180 kWh |
| 6 kW, no battery | €6,700–8,000 | 9,820 kWh |
| 5 kW + 10 kWh battery · EPS | €11,600–13,900 | 8,180 kWh |
79 installation companies work here
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
Checked against the official source of each rule. Conditions apply: open the source before relying on a figure.
40% of the cost, up to €3,520
Homes in the Comunitat Valenciana: 40% for your main residence, 20% for other homes. Installation registered with the regional administration.
50% off the property tax for 10 years
Residential properties with at least 2 kW of solar for self-consumption; also shared self-consumption participants.
95% off the construction tax
Reduces the municipal construction tax (ICIO, 3% of the material cost) on the solar part of the works by 95%. Claimed with the works licence or declaration.
40% of the cost, up to €3,000
Main residence, or a home you rent out (or rent out before 31 Dec 2027). Needs energy performance certificates issued before and after the works.
10% of the cost, up to €500
Individuals who own the property; the installation is not used for an economic activity and is finished and paid for in 2026.
Yes: 5 programmes apply to homes in Castellón, including Valencian regional income-tax deduction for self-consumption — 40%; IBI property-tax bonus for solar — Castelló de la Plana; ICIO construction-tax bonus for solar — Castelló de la Plana.
A home system of 3–6 kWp typically costs €4,300–8,000 installed, VAT included, before subsidies.
About 1,636 kWh per installed kWp a year with panels facing south at 33°, so a 3 kWp system produces about 4,910 kWh a year.
For a home using 4,000 kWh a year, a 3 kWp system pays for itself in 12 years before subsidies. Subsidies shorten it.
Banks and installers offer their own loans. SolarPlan lists only loans with published terms, and none is listed for Castellón yet.
i-DE Redes Eléctricas Inteligentes (Iberdrola). Some towns have a smaller local operator: your electricity bill names yours. The distribution company checks the application the installer files, installs the two-way meter and connects the system.
79 installation companies work here, among them Valfortec, 1KOMMA5° España, 30Surenergy, ACQUAeNER, Alfa Global. SolarPlan sends your plan to up to 3 of them (5 for a business) once you ask for offers.
Subsidies & incentives
Every programme that lowers the cost of home solar in the Valencian Community: what it is worth, who can use it and where the official rules are.