How Long Do You Charge A 12 Volt Battery. In general a solar panel with power rating in watts just above the batterys amp-hour rating will charge a 25 discharged 12 volt lead-acid battery in 8 hours It is recommended to use a solar charge controller with a solar panel rated more than 5. How Long does it take to Charge a Car Battery with a Trickle Charger Since a trickle charger is typically 15 or 2 amps it will theoretically put 15 or 2 amps per hour back into a car battery.
To charge a standard 12-volt battery you have to bring it up to above 14 volts amount varies with the type of battery. For example a 15 amps battery charger will take two hours to charge a battery. Consequently at a rate of 4 amps per hour it will take you a total of 12 hours to charge a dead battery.
Actually it is not possible to charge a 12V battery with another 12V battery directly.
In actuality the number is a little bit less and all battery chargers will be about 80 efficient plus or minus due to a myriad of factors. A 5 amps battery charger will take six hours to. Then hook up the charger to the battery. This 14 hour charging time is best for every time the toy is used.
