1.Features: (1). Cheap and reliable solution, Simple structures, Easy installation. (2). High efficiency of heating,water heated by sun light directly. (3). Withstands water pressure no more than 0.1MPa. (4). Operated without any power supplying. (5). Electric heater can be used as back-up in rainy days. (6). Hot water can be used directly, or can be used as a pre-heated. (7). Water flow in the vacuum tubes and is operated when confined. (8). Tank is equipped with electric water heater setting, automatic temperature controller(optional ). (9). the insulating layer uses polyurethane bulk bubble,keep hot water 72 hours.
2.How to choose: Choose the item according to the capacity, and choose the capacity according to the people quantity in your family, one adult shower need about 50 L water. Normally,50 liters is only used for one person's shower.