# How long can you run a fan off a car battery?

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## How long will a 12 volt fan run on a car battery?

If you use the upper 500ma (1/2 amp) draw for your calculation, the fan will use 1 AH (amp hour) of power every 2 hours. If you have a typical single battery that came with the camper it is more than likely about 80-90 AH, of which 40-45 AH is usable before you need to re-charge the battery.

## Can you run a fan off a car battery?

Direct Current (DC) vs Alternating Current (AC)

Your car, as well as other devices that operate by battery power, use a direct current (DC) system that operates with 12 volts of current. … So a household fan or other standard appliance cannot be powered directly by the relatively small amount of power in a DC battery.

## How many watts does a 12v car fan use?

For instance, a 12v fan that has a 0.25A current will draw 3 watts of power.

## How many amp hours does a fan use?

The majority of modern ceiling fans use less than an amp, averaging between 0.5 and 1 amp, depending on the model and the setting. One amp drawn by a ceiling fan is equivalent to about 120 watts. Low settings use less amperage while higher settings use more.

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## How long do fans stay on?

You can leave a fan running continuously for eight hours, on average, without worrying about unexpected ceiling damage or fires in your home.

## How long will a battery powered fan last?

A Fan-Favorite Floor Fan With Lots Of Power

The fan has a built-in rechargeable battery that can last anywhere from four to 20 hours on a single charge — and you can even use it while it’s charging.

## How long does a 12V 7Ah battery last?

Look for the energy rating listed in units of Ah, that is Ampere-hours. For example, a 12V 7Ah battery will last for 7Ah/10A = 0.7 h = 42 minutes while supplying 10A.

## How long will a car battery power a light bulb?

A car battery with an inverters can power a single light bulb for up to 3 hours, a single light bulb for up to 17 hours, and a single light bulb for up to 29 hours.

## How much electricity does a fan use per hour?

Thus, fans have a bigger impact on power bills. While a tubelight consumes around 55 watts per hour, an average fan consumes 75 watts. Old models and inexpensive fans can guzzle up to 90 watts. Replacing your old fan with a power-saver model makes sense as a BEE rated fan consumes around 50 watts.

## How much current does a car fan use?

Amperage used to measure how much load an electrical device draws when in operation. Automotive fans are rated at 13.5 volts, and the rating is after the motor is at operating RPM. The initial start up of the fan will have an amperage spike of up to 60 percent, which lasts only a millisecond.

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## How many amps does radiator fan draw?

Twelve- to 16-inch fans can draw from 15 to 28 amps, while some dual fan applications can draw up to 35 amps. Make sure your electrical system can handle the addition of an electric fan.