... steel, hot-dip galvanized, plastic spray coating,C, Life span, no rusting within 30 years.Solar panel: A, Solar panel, amorphous silicone, ... 15-20 of system power.B. intelligent digital controller can save >80% power than the regular solar garden lights.C ... -aging waterproof connectorsB, Life span: ≥10yearsProduction field Solar street lamp project case Solar street light Wiring diagram DC12V system