Collector shell is made of marine-grade aluminum-magnesium alloy, beautiful and durable rigidity. Hot water system can only control, and with a variety of protection, the use of safe and convenient. Given the use of solar energy has the best confront uncertainties and other unpredictable characteristics, solar hot water engineering services, the system can be set according to user needs with hot water, solar hot water, automatically give priority and full use of solar energy heating. When the rainy days, solar hot water production is insufficient, solar hot water engineering firms, the system will automatically start the auxiliary heating device, and only supplement the shortage of hot water. To achieve the maximum use of solar energy, maximum energy saving. Solar hot water project tender _ Qingdao Yi Gang (certified) _ solar hot water provided by solar energy, Ltd. Qingdao Yi Gang. Yi Gang Qingdao Solar Limited (www.gangyisolar.com) is in Qingdao, Shandong, solar and renewable energy leaders, over the years, the company implement the scientific management, innovation and development, the principle of honesty and trustworthiness, and satisfy customer needs. Qingdao Yi Gang leader with the staff warmly welcome all inquiries negotiations to create Qingdao Yi Gang better future.