... ,ISO9001,CCC, 3.reliable quality,offer OEM flat solar system(for a project) 2. Specification: 1×2 m², the water can rise ... , stable performance, little maintenance, can stay for nearly 20 years.6. Diverse specification, fit for different kind of family.7. There always ... even the cold winter.8. The preserved water tank has a water-storage function, using when there is no water supplying ...