ECO-WORTHY 100w Poly Starter Kit: 100w Polycrystalline Solar Panel + Solar Cable Adaptor + 15A PWM Charge Controller + Z Mounting Brackets Basic component for 12V resident off-grid system. Multiple panels can be wired in series for 24v battery charging. Waterproof: IP-65 rated junction box complete protect it against environmental particles and low pressure water jets. Corrosion-resistant aluminum frame for extended outdoor use, which allows the panels last for decades. Controller protection function: Over charge, over discharge, overload and short circuit protection. Solar cable adapter and Z mounting brackets make it quick and easy for installation.