There are different types of solar energy. Some solar insulation layers are made of polyurethane, which has a very good insulating effect. Generally, the water isolation time is about 3 days. Some manufacturers use Styrofoam as insulation material, which is the worst material. If the insulation effect is not good, the water can only be kept warm for 1 day.
How long should solar insulation be kept?
Introduction The shelf life of the solar thermal insulation layer depends on different solar energies. Some solar thermal insulation layers are made of polyurethane, which has a very good thermal insulation effect. Generally, the water thermal insulation time is about