By definition, greenhouses rely on the sun for light. However, many greenhouses also use gas or oil for heat. Converting to a solar-power-only greenhouse may save the grower money and energy.
A solar-powered greenhouse stores the sun's energy in its building materials and uses it on cloudy days and at night.
A solar-powered greenhouse usually faces south, having its northern side well insulated. This provides the most exposure to sunlight. The greenhouse's southern side has a glaze that retains sun energy well.
Use of Heaters
Solar-powered greenhouses usually still have a gas or oil heater as a backup. They may also use the heater to provide higher levels of carbon dioxide for plant growth.
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