... life 15 years5. Capacity: 50-300 LitersAbout Us:Jiangsu Sunpower Solar Technology Co., Ltd1. Leading exporter: more than 500000 sets ... solar water heater per year to 86 countries.2. OEM professional: systematic OEM service, from package design to tech support...... ... 3. Various certificates: ISO, EN12975, EU CE, Solar Keymark, Kang-Ju, KOLAS, SABS, ...