Should the solar still be placed in direct sunlight?

Choosing the Right Location

When placing a solar still in direct sunlight, it’s essential to position it at an angle that allows for maximum exposure to the sun’s rays. This angle typically varies between 30 and 60 degrees, depending on the latitude and time of day. A south-facing orientation is ideal in the Northern Hemisphere, while a north-facing orientation works best in the Southern Hemisphere.

Optimizing Still Performance

To maximize water production, the still should be placed on a surface that can absorb and retain heat. A dark-colored tarp or plastic sheet is an effective choice, as it can reach temperatures of up to 140°F (60°C) on a sunny day. Avoid placing the still on a reflective surface, such as metal or white plastic, as this can reduce heat absorption and compromise water production.

Protecting the Still from Extreme Temperatures

While direct sunlight is essential for water production, extreme temperatures can damage the still’s components or cause the water to evaporate too quickly. To mitigate this risk, place a thin layer of insulation, such as foam or bubble wrap, on the underside of the still’s collection tray. This will help regulate the temperature and maintain a consistent water production rate.