1Does solar hot water heater work in wintertime?wintertime does have sunlight. If you have sunshine, solar water heater work. Don't think about the heat associated with the environment, sun light comprise a wide spectral range of radiations diffused radiations, noticeable radiations, infra-red, ultraviolet, etc. The machine carries out fine as part of winters too. If The temperature goes below the freezing aim concerning a longer time, you need to install as request additional heating fluid or perhaps warming exchangers to avoid freezing of water.