Invest in a solar system to make the outdoor swimming season longer

In Zürich, for example, the outdoor swimming facilities are open daily from May to September. Here’s an idea to owners/managers of outdoor swimming facilities: How about investing in a solar system and thereby make it possible to keep the outdoor swimming facilities open for a longer period of time of the year. Consequently, the investment in the facilities will pay off better.

I came across the idea via the website of Conergy.