The ultimate guide to off-grid living in Spain
Everything an off-grid home in Spain needs, from buying rustic land to sizing the solar, finding water and getting the septic tank legal. Typical costs from Spanish suppliers, the mistakes buyers make, and Max's journal from a finca in inland Alicante.
Where are you with your off-grid plan?
Property plannerEverything an off-grid property needs
What going off-grid costs in Spain, and who can do it
Typical price ranges checked against Spanish suppliers and quote sites in November 2026. Your quote will depend on the property, the access and how much you use. Each card links to the full guide and to firms that cover your area.
Equipment prices exclude installation unless stated. Sites don't always say whether VAT is included. Sources are named on each card.
The guides people ask about first
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Planning solar for a finca? Get a quote from an installer who knows off-grid.
Tell us about the property once. We pass it to one vetted installer that covers your area. Solar first, with water and septic quotes to follow.
Quick answers
How many solar panels does an off-grid home in Spain need?
More than most people think. A reasonably comfortable home uses 20–40 kWh a day once air-con, a fridge and a water pump are counted, so if you think you need 10 panels, plan for nearer 20.
Can you live on rainwater in Alicante?
Just barely. A 100 m² roof realistically collects about 20,000 litres a year, around 55 litres a day, against roughly 150 litres a day for showers, cooking and laundry. Most people combine rain with a borehole or deliveries.
Septic tank or compost toilet?
A septic tank is the default: the tank costs €900–€5,000, fitting starts at around €1,500, and licences are extra. Compost toilets cost €200–€1,500 but take more effort. Many people end up with a mix.
Are wind turbines worth it?
Rarely. Serious turbines cost thousands and the cheap ones online rarely deliver. For most fincas, more solar is the better buy.
How much does it cost to go off-grid in Spain?
Leaving the property aside, a solar kit with battery, a rainwater tank and a fitted, licensed septic tank start at around €7,000 and often run well past €20,000, before paying anyone to install the solar. A borehole adds more. Sources are in the cost table above.
Who can help with your property
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