... electricy.when no wind or no solar can charge the power from city power to battery bank.2.Application:1) In-car or ... lights, and etc. 2) Industry equipments series: solar energy, wind power, gas discharge lamp and etc. 3) Office area: Computer, printer ... : Electric fans, vacuum cleaner, AC, lighting lamps, and etc. 6) Power tool series: electric saw, drilling machine, punching machines, air compressors ...