The 20 watt all-in-one solar led street light combined the best energy saving parts: high efficiency solar panel,Website:http://www.topololighting.com, LED lamp and special Lithium battery. With the help of the controller and PIR motion sensor, it realizes the functions of high light output, low energy, long lifespan and free maintenance. it's easy to install and suitable for residential streets, parking lots, playgrounds, garden and as security lighting. The applications for solar powered outdoor lighting system are endless. With the addition of the Guardian PIR motion sensor, illumination levels will self regulate upon detection of movement throughout evening which further improves battery autonomy.ModelISLL-4520(20W)Solar panelMonocrystalline18V 45WBatteryLithium battery12V/18AhMax power12V 20WLED sourceLed chip110lm per watt from BridegluxLumen(LM)2200lmLife cycle50,000 hoursHousing materialExtruded aluminium alloy with polyester epoxy powder coatingCharge time6 hours(full sunlight)Discharge time12-16 hours(full power)30-36 hours (saving model)ApprovalCE/ROHS/IP65Warranty3 yearsOutline dimension940*305*140mmPacking detailN.W./G.W.1.5/12KGCarton size1000*370*215mm