HOW LONG WILL A DEEP CYCLE BATTERY LAST ON A SINGLE CHARGE?
Discharging, like charging, depends on a number of factors such as the initial State-of-Charge, average Depth-of-Discharge, condition and capacity of the battery, load and temperature. To determine the amount of discharge time (T) for a fully charged battery at 80° F (26.7° C), the simple formula is ampere-hour rating (C) divided by the average load in amps (I) or T = C / I is often used. So, 100-ampere hour battery with an average 5-amp load should last approximately 20 hours (100 AH / 5 amps). The total number of amps that are produced when a fully charged battery is discharged over a 20 hour (C/20) period and to 10.5 volts is the most commonly used specification for expressing the capacity of deep cycle batteries used in most RV and Marine applications; however, five (C/5) or six hour (C/6) for Golf Carts or eight hour (C/8) rates for RV/Marine batteries might be more realistic. For example, if a deep cycle battery’s capacity is rated at 100 ampere hours (AH) at the 20 hour (C/20) r
