![]() When looking at different models, the average watts required by either the 9” or 12” versions was 40 watts. How Long can a Car Battery Power a Personal Desk Fan? With that inefficiency of 15%, remember to take the final amps required by your fan and divide them by 0.85 to get the actual total draw from the battery so that it will still be able to provide the required amps to the fan after passing through the inverter which will remove 15%.Įstimated AH of the Car battery (50) / (Direct Current Amps drawn by the fan / 0.85) There’s not much you can do about it, it just comes with the territory when inverting DC current into AC. A 400w or 500w inverter would be suitable for any of the fans that we’re going to cover here, and this inverter is one with very solid reviews from Amazon at a great price point.ĭue to the fact that the inverter is being used, we are going to lose about 15% of our efficiency overall when powering our fans. In order to switch the current type, we need to use an inverter as an intermediary between the battery and the fan so that the direct current can be changed into alternating current. With the exception of the USB fan, we’re looking to power household fans that run on alternating current (AC). Theoretically, a car battery with a 50AH equivalency should be able to release 1 amp for 50 hours, 2 amps for 25 hours, etc. This is a common estimation in the battery world since car batteries are “starter batteries” which are rated in CCA (Cold Cranking Amps) and not AH like other “deep-cycle” batteries. How much Energy does my Car Battery have to Power my Fans?įor all of these examples below, we are going to assume your car battery has an ampere-hour (AH) rating of 50 hours. If you want though, you can also skip to any of the specific fans by clicking them below but you can refer to the battery section if you have any questions about the numbers I used. This article will not be taking into account Peukert’s Law. We’ll take a look at the most common types you’ll probably run into, how I reached these numbers, and the best fan for conserving your battery’s life.īefore we cover each of the fans individually I’m going to briefly go over the car battery and the inefficiency factor of using an inverter. Simply match the model number of your fan to the blades and follow the installation instructions to be cool as a cucumber again.How Long Can a Car Battery Power a Fan? Fan Type 100% Discharge (Total Time in Hours) 50% Discharge time in Hours (to still start your car) Desk Fan 12.76 6.38 Tower Fan 9.45 4.73 Window Fan (Both fans on High) 9.1 4.54 Box Fan (High) 5.31 2.66 Box Fan (Med) 6.21 3.11 Box Fan (Low) 7.97 3.98 Oscillating Fan 6.21 3.11 USB Fan (3-watt) 200 100 50AH equivalent car battery.Ī car battery can power a fan - many different types of fans, in fact. If your cabin fan blades need replacing, it is an easy task to tackle. They also serve to keep foreign objects (read fingers) out of the path of the blades. These fan guards are made of steel dipped in black plastic to protect against corrosion when exposed to the elements. Many DC models feature soft vinyl “finger safe” blades that minimize the risk of injury if touched.Ĭentek, makers of the 120 volt axial fans we offer, offers fan guards for fans ranging from 11 to 36 inches. Features to look for include multiple speeds and an adjustable bracket. Some models include safety mechanisms that stop the rotation of the fan if the blade gets caught on something, which provides extra peace of mind. Cabin fan blades are plastic or composite and are designed to hold up well in humid or damp conditions. When shopping, take note of the fan’s capacity, which is rated in cubic feet per minute, and buy a fan with the capacity you need. 12-, 24- and 120-volt fan options exist, allowing for greater versatility across a range of boats. They are compact and have a sealed, ignition protected motor which makes them suitable for installation where explosive vapors might be present.Ī cabin fan can keep you cool on windless days and help you avoid needing an air conditioner in some climates. ![]() ![]() ![]() They are often used to ventilate engine rooms on small boats to reduce the chance of an explosion. Whether you are looking for an axial fan to optimize ventilation in an engine room or just want to keep the cabin cool during hot days on the water, West Marine is sure to have a marine fan to meet your needs.ĭesigned to act as supply or exhaust fans onboard boats, axial fans are permanent installations that help draw air in or out of enclosed spaces on boats. ![]()
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