Assure you have the electricity when you need it! HOW MANY WATTS DO YOU NEED? The speed (amps) and pressure (volts) of electricity are measured as watts (Amps * Volts = Watts). So a 60 watt light bulb uses 120 Volts times 0.5 Amps for each hour it is left running (typically 7PM to midnight as an average). Now batteries…