About Sunward

Solar output, batteries, rainwater and real costs for off-grid and low-energy homes in Portugal and Spain, with a simple solar sizing estimator.

How we work

• Every factual claim links to its source, preferably an official one.
• Rules on visas, tax and property change often. Each guide shows when it was last reviewed, and we update it when the rules move.
• Nothing here is legal, tax or financial advice. For decisions that matter, check with a qualified professional.
• If you spot a mistake, tell us and we will correct it.