How Long Will A 120 Amp Battery Last. Long Story Short. An LPG leak detector that draws 2 amps and operates 24 hours will consume 48 amp hours from your batteries.
A simple example but heavy user of power is a 12 volt hair dryer rated at 10 amps. What that means is that a 100 amp hour battery that has a constant load of 5 amps on it should last 20 hours. P V I.
Therefore 10 lights will be 456 Watts total per hour.
Note if this 150 amps is drawn from the battery for one hour 150 amp hours AH of battery power will be used. 150 watt TV 12-volts 125 amps. Batteries are rated for 5 amps over 20 hours of time. AGM battery will have a 11 Peukert Constant in this.
