The numbers favour this city: long sunshine hours from spring to autumn, mild winters, and hot water that is otherwise produced entirely by electricity — there is no gas network in Vlorë, so every shower heated by the sun is a direct cut to the electricity bill. A correctly sized solar system covers most of a household's hot water for most of the year, with the electric backup handling the grey weeks.
For rental properties the arithmetic is even better: hot water demand is highest exactly when the sun is strongest. A villa full of August guests is a solar water heater's ideal working conditions — and the running cost approaches zero during the months that generate the season's income.