Will a fan drain my car battery?

Fans draw quite a bit of current! All you need to do to be able to answer this question is, find out how many amp-hours (AH) your battery is…and how many amps your fans draw. If your battery has 50 amp-hours(AH) of reserve, and the fans draw 10 amps, then your battery would last 5 hours with the fans on…

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

What this means is that the amount of time this battery could continuously supply a current of 1 amp would be 70 to 80 hours before going completely dead. An automotive fan can draw anywhere from 8 to 15 amps .

How long can I run a small fan on a car battery?

Your 30 watt fan will draw about 2.5 amps at 12 volts (2.5 times 12 is 30). Assuming 90\% efficiency from the inverter means that the inverter will draw 2.5/. 9, or 2.78 amps. A 50 Ahr battery will last 50/2.78 or 18 hours.

Can a bad fan relay cause battery drain?

Short answer is yes. If a short circuit or over-volt has happened on one side of the relay then it can cause a stuck open/closed circuit on the other side. Also check the earth strap from battery to chassis. A bad connection there can cause drain too.

How do you power a 12v DC fan?

To power a DC fan, we feed the fan its rated voltage. For example, to power a 12VDC fan, we need to feed it 12 volts DC. This power can come from any DC voltage source, such as a DC power supply or even batteries. If using batteries, in order to get 12V output, you would have to place 8 ‘AA’ batteries in series.

What causes battery to lose cranking amps?

Over the life of a battery, discharge-recharge reactions happen thousands of times. Each cycle wears out the plates a bit, and over time the lead deteriorates. As your car battery loses capacity, cold cranking amps decrease.

Do amps matter in DC?

Many people know it is important to match voltage of a power supply or charger to the product. The product will often say 5V DC. It is important that 5V DC is applied to the product. So if a product requires 2.1Amps then the power supply should be able to supply 2.1Amps or more.

How much power does a DC fan use?

30 watts
In fact, a DC motor will consume as much as 70\% less energy than its AC counterpart will. For instance, whereas an AC fan may consume 100 watts, a DC fan will consume just 30 watts. Still, both of them produce the same result.

How long can a fan run off a car battery?

A very long time! Your fan is probably in the milliamp range. Maybe an amp. Car batteries discharge in amp/hours. And a car battery can be rated 100/amp hours. About 100 fans could run off your battery and it may last a few hours. But one fan many days.

How many amps does a car fan draw?

An automotive fan can draw anywhere from 8 to 15 amps . Do the math but do not forget that after you’re done cooling yourself the battery needs to be strong enough to start the car. And that requires 150 amps on average. Save up to 80\% on your next printer ink cartridges!

How much power does a 12 volt battery put out?

Depends on the amp hour rating. A 12 volt 1ah (amp hour) battery is rated to put out 12 watts for 1 hour before it is fully discharged. Or it could do 24 watts for a half hour. A 12 volt 2ah battery can put out 24 watts for 1 hour or 48 watts for half an hour.

Do 12 volt batteries work with cigarettes?

Most of the newer models will either work directly off 12Volt or they have a 12Volt adaptor that will plug into a cigarette socket. They will work fine off an inverter but the downside with that is that the power losses, which means we may not get a full 8 hours out of our 12Volt battery, so it’s best to avoid an inverter if possible.