The All Pond Solutions Light Grey Bowl Stone Solar Water Fountain / Feature brings elegance and serenity to your garden with trickling water and modern design. Designed to look like a real stone, the material it's made from makes it fairly light yet sturdy but also UV- and frost-resistant. Pump performance in different weather conditions: Full Sun - The solar panel powers the pump and charges the battery. PLEASE NOTE: The solar panel takes 2 hours to fully charge. Once fully charged it powers the pump for 2 hours in cloudy conditions. Partly Sunny - The solar panel powers the pump and supplies extra energy to the battery. Cloudy - The pump will only run when there is sufficient power from the battery. Little or no battery charging occurs.