Our products Off-Grid Portable Solar Home Lighting System come with a 2 year warranty. Place of origin Liaoning, China. Application Range Household items. Solar panel type polycrystalline silicon. Battery type Lithium ion. Controller type PWM Installation type Ground mounted Load power (W) 5kW Output voltage (V) 5V/6V Output frequency 50HZ Operating time (hr). 8-10H, Battery capacity. 7.4V/2,200MAH Type. Off-grid system DC. Product name Off-grid solar BT speaker system. Polyester solar panel 10.5V/3WSolar panel wire 3m. Light cord 3m Fully charge time 5-6 hours.