Solar geyser is here by the most effective way to heat water without any expense. solar geysers run on the phenomena of radiations, the sun emits radiations that transfer heat. the solar geyser is designed at such an angle so that it caches maximum radiations from the sun. The glass tubes in the geyser are also black so that more radiations can be absorbed. The The tubes have a vacuum in between them so that heat loss from with in the tube through convection and conduction could be prevented. The tank of the geyser sits on top of the tubes so as water heats up, it rises up to the tanka nd cold water takes its place inside the tubes. The tank consists of two layers, the inner layer is made of stainless steel and the outer layer of the tank is made by galvanized steel. There is a polyurethane insulation in between the two layers that prevents heat loss from the tank. The tank is os perfectly insulated that it it can keep water warm for as long as 48 hours. The frames are made of galvonised steel as well so there is no chance of rusting, giving the geyser a long lifetime.