This small 12 volt DC powered evaporative cooler will run off a 12 volt battery or direct from a 48 watt or larger PV module. Using only 2 to 4 gallons of water per day, this unit will effectively cool a space of approximately 300 square feet. In addition, it will filter the air of pollen and dust.
Installation is easy.
Just place it in a window, connect to any water source or small storage tank, and connect to a PV module and linear current booster or to 12 volt battery power. When directly connected to a PV module, cooling begins when the sun hits the panel, and increases as the sun's intensity builds. Cooling automatically continues as long as there is sun on the panel. The 18A2 will even work at reduced speed during overcast conditions. If connected to a battery, it can provide cooling 24 hours a day.