how long can a car battery run an air conditioner

I have seen vehicles with multiple alternators, such as BASS competitions. That might allow you to use a smaller engine for the same performance (passing especially) with a simple software change. The Correct Method of Braking in a Manual Car; How Long Can a Car Idle: The Precautions You Should Take. Then the heat would get exhausted that way. I have a 5000 btu air conditioner which draws 530 watts. My van has a/c and can be turned on with engine running, but when stationary the a/c hose gets so hot that the ends melt. AC for grid-connected homes The fact that we are all able to access almost unlimited amounts of electricity 24/7 is a beautiful part of our modern electricity grid. Disconnect the battery. Technically, you can run your AC off a couple of 100 amp-hour batteries—it just won't run for very long. My household fridge (basically an AC unit) uses 250 W to cool down several hundred litres. I would like to travel in my car but because of health issues I would need to be able to sleep in my car also, or at least rest for long periods. An electric car does things differently because there is no engine, and so delivering power to the AC and just about everything else is determined by the amount of stored battery energy. Several companies (VAG, BMW) have switched to AC units that are driven by electric motors. It's not exactly frugal. When the vehicle or craft isn’t in use, connect the device to the terminals. To run it from an electric motor, you would need to do kinetic at the engine, to electric at the alternator, then back to kinetic at the motor for the compressor. I asked on another forum and was told to expect only 15% battery use. If you bolted an electric compressor onto the car you would have to find a way to switch between the mechanical and the electric compressor, and that no one makes. I would sacrifice 50 to 75 pounds no problem for ice cold ac in Phoenix. Battery conditioners If you have a second car that rarely gets used, a trickle charger is ideal for maintaining the battery's power. Also beef up the electrical system enough to be able to run said motor. But I doubt that’s what happened here. Determining Cycles Per Hour . Dramsey. Not like an electric car has an accessory belt... @saurabh64 Tesla, electric cars and many hybrids use, high voltage, electrically driven compressors. A portable air conditioner unit for your car, truck or RV can be your simple solution to your heat problems. An optional cigar lighter connector is available for use on vehicles with a permanently live cigar lighter or auxiliary 12V socket. An electric car does things differently because there is no engine, and so delivering power to the AC and just about everything else is determined by the amount of stored battery energy. However, I can't do this in the summer, when the temperature inside a car can be over 100 degrees F. One advantage I see with HCH II (I do not own one yet) is that since the air conditioner can … To check how much is the consumption, one activity you can do is to put off all the devices that run on battery and keep only fridge ON. The compressor draws several kW. NYBo. Cars have an A/C compressor that is mechanically driven by the engine because this is the easiest way to get the job done in a typical consumer car. https://mechanics.stackexchange.com/questions/28741/can-a-car-ac-unit-be-run-on-just-the-car-battery/28744#28744. I have a stock 2006 Ford focus sedan. It consists of several major components including a condenser, evaporator, and compressor, among other parts. An A/C compressor actually takes a huge amount of energy to operate. 2 105 amp alternators, big high amp inverter, custom capacitor setup for the surges? Install a second radiator under the hood and 12v pump and fan. Electric heat can use 100A all by itself - more than everything else combined. Weighing only 12.8 pounds and at one-fifth of the size of the average portable air conditioner, Zero Breeze has really designed this model with portability in mind. yes he did: "avoid wasting fuel". Finally to a car battery, hopefully a 2nd car battery. There is NO free lunch, you will need many batteries and a much better alternator. I was quite happy with the run time. Simply put, it's this change in pressure that cools the air coming into your cabin. It is possible to run your air conditioner for extended periods of time while you free camp - purely from your 12v Battery. From that, I would expect an absolute max of … If you’re not experienced with the functioning of your air conditioning system, then you might not be aware that an air conditioner’s run time is measured in cycles. The bad alternator diode can cause the circuit to charge even when the engine is shut off, and you end up in the morning with a car … @MasonWheeler, ok, yea, electric heat is the biggest power user, but in my mind I lump that in with the HVAC system. Peltier elements are really inefficient. 0. How would you handle the air flow/circulation? Can a car AC unit be run on just the car battery? 54 sections 18650 lithium battery composition Normal use for about 5 hours, 3.5 hours at full load. I have read about the extra battery to power computer, etc. Interestingly, my power bills tend to be significantly higher in the winter (when I'm running the electric heaters) than in the summer (when I'm running the AC). An easier approach would be to drop the A/C clutch out when you tromp on the accelerator. July 5, 2016, 8:15pm #7. The electric system would allow you to run soley from batteries in important times, but the engine management could just as easily turn off the mechanical A/C compressor at those times as well. That hiccup in the drivetrain can get annoying. You could always do it with a window air conditioner and a huge inverter, but the efficiency would be pretty bad I bet. http://www.amazon.com/TEC1-12706-Thermoelectric-Peltier-Cooler-Volt/dp/B002UQQ3Q2. Your battery will die quickly. … A 12V compressor would be unnecessarily large, https://mechanics.stackexchange.com/questions/28741/can-a-car-ac-unit-be-run-on-just-the-car-battery/28787#28787. Supplied with a 5m long power lead, crocodile clip battery connectors and a handy car window hangar the Airflow Battery Conditioner is easy to connect and use. There are peltier elements that also generate a cooling effect compressor free. You may need about 16 to 20 flooded-cell, 12 volt batteries, at 100 AH each, to run two air conditioning units for 8 hours. That test was done at full power and trying to cool a hot 86 degree F RV down to about 66 degrees F. Disconnect the battery conditioner, and you’re on your way. from that i might wager that your 8000 btu might take 800 watts, that's extra advantageous than your inverter might placed out. 0. I know on my car there's a "full-throttle" switch that will disable the A/C compressor when I floor it, it's possible other cars have this too. Increasing fuel efficiency as the fuel wont be wasted for running the AC. Where can I find the correct pressure for my tyres? I can assume that that outside temperature will be less than 85 but I will need the air conditioner to lower the humidity. The air conditioner will be more efficient while the car is moving since more air will be flowing over the heat exchanger. Now I wonder if I had shut off the car (to save gas), how long would the battery last if I used the AC. An compress driven by an electric motor only takes the power it needs. You will need to judge your oil changes differently though. I can hook up 2 alternators to my car but have seen 10 to 15 alternators hooked up to the subwoofer competition trucks. the blower motor takes about 20 amps to run. The aerodynamics in the below example are also a bit dubious. Call it 11,000 Watt Hours. https://mechanics.stackexchange.com/questions/28741/can-a-car-ac-unit-be-run-on-just-the-car-battery/28758#28758. The only way the a/c could drain the battery with the ignition off is if the clutchh relay were to stick, keeping the clutch engaged. battery powered air conditioner* Powered by its interchangeable power base. The air conditioner will be more efficient while the car is moving since more air will be flowing over the heat exchanger. Among the drawbacks of cars that run on battery power is the energy required to heat their cabins. Either that or a water cooling loop. 1 Like. http://www.amazon.com/TEC1-12706-Thermoelectric-Peltier-Cooler-Volt/dp/B002UQQ3Q2. Now when the car starts, the "check engine" light turns on and the air comes out un-cooled, just the temperature of the outside air. What will happen if I change the battery at even higher CCA when it needs to be replaced? I can hook up 2 alternators to my car but have seen 10 to 15 alternators hooked up to the subwoofer competition trucks. from that I would guess that your 8000 btu would take 800 watts, which is more than your inverter would put out. So using an electric motor on a conventional car might give you a few more HP briefly, but the alternator has to eventually make up the deficit, and a bit more for its own inefficiencies. Pease advise how to reset the freestyle freedom system after changing the battery.? So, one would think we could assume that the battery would run the air conditioner for about one hour. Likewise with brake pump etc. An inverter changes the battery's DC output into AC power to run your AC appliances (including your air conditioning unit). This means the alternator would have to work harder to make up for those losses and take more power from the engine. You would at-least need 700 amp hours to run for a day. how can i replace my Car engine from gasoline to desiel ? 11 Best Battery … LaoTzi Portable Air Conditioner, Rechargeable Evaporative Air Conditioner Fan with 3 Speeds 7 Colors, Cordless Personal Air Cooler with Handle for Home, Office and Room 3.3 out of 5 stars 692 NOCO GENIUS10, 10-Amp Fully-Automatic Smart Charger, 6V And 12V Battery Charger, Battery Maintainer, Trickle Charger, And Battery Desulfator With Temperature Compensation Truly hassle free from in-house wall plug. They are essentially a plate of ceramic postively charged, and one negatively charged. You are missing one very important factor, anything that is directly driven from the engine needs to have the gearing design so it gets enough power at low engine revs, therefore at normal or high revs the compressor gets more power than is needed. A battery conditioner comes with a set of terminals that can be left on the installed battery for convenience. If your car’s air conditioner isn’t blowing cold air, the first thing you should look for are signs of leaking … Choose between three speeds—low, medium and high—when you want to blow cold air to keep your pet … This Enerdrive 12v Lithium Battery Setup will allow you to run your air conditioner and other heavy amp drawing 240v appliances without the need for a generator or mains power - making caravanning a lot more … The A/C is something like 2.4kW which is about 8,000 BTU/h or about 3HP. Sure, just find a space to add an electric motor in the engine compartment, re-jigger the belts so that the electric motor drives the compressor, and make it so it starts when the compressor clutch would have engaged. Car would not start this morning, AAA told me it was my battery and installed a new one. A typical 12 volt flooded-cell battery, delivering 100 AH, weighs about 50 pounds. There are many reasons to get your air conditioning recharged besides the most obvious one being to keep you and your passengers cool on journeys in hot weather (though we might add that leaving a box of lollies in a non-air conditioned car for too long can be very upsetting for kids and grown-ups alike). Also, if the battery becomes depleted, the internal combustion engine is started to recharge it. The peltiers are less than 4mm in many cases so you will need something thin to keep them apart, depending on the total size of your device. I wonder how AC works in Tesla cars as they are completely electric cars. As @JPhi1618 noted, the compressor is mechanically driven. At 5 kW, it would last 12-24 minutes if the full battery capacity was used, but actually only about half of the battery capacity is used (to improve longevity) meaning 6-12 minutes. A second alternator to charge the second battery is still taking power from the engine and, now the engine has more rotating weight to drive. Other companies use similar strategies, BMW is just the first I could find that offered some explanation of why they switched to electric AC. Since Watts=Amps x Volts, we can determine that this battery also contains about 600 watt-hours of electricity. No free lunch. As they're designed for it, I would bet that they have an electric compressor designed for this. I will be using my cpap machine and will have the Air Conditioner at about 75. Today I went out and used the blowers for about 45-min while I did some work on my laptop. When put to hot, the air does heat. The LifeSmart cooler is a great option for you if you think you might be near electric hookup for some of your camping trip. An instant blast of cool air keeps flowing car can deal with all... Hot side to a large copper plate, aluminum also could work, but the person did say... Will happen if i change the battery, this model is also eminently Portable your. How many you would need, but the person did n't say it had to be geared for engine... Install a second car that rarely gets used, a trickle charger ideal... As overtaking and climbing on slopes turbo cars that have to attach the hot side a. Power at high revs 5 hours, 3.5 hours at full load but there are Precautions! Power loss during important times such as BASS competitions moving since more air will be flowing over heat... One for an hour cranking in the car campers, this model is also eminently Portable for the... Why almost no attempt has been made in gasoline cars to run your air conditioner attracts... Compressor has to be replaced smaller engine for the 20-hour rate of discharge will have the electrical,! Custom capacitor setup for the early late 80s/90sDodge 2.2/2.5/3.0 will disengage the AC system to.! The power it needs to be how long can a car battery run an air conditioner to run i change the battery at even CCA. Your alternator has a bad diode, your battery, this would not start morning. Negatively charged never free either inside your door, or perhaps behind the back with the car on, store! Gets used, a trickle charger is ideal for maintaining the battery even... Efficiency as the fuel wont be wasted for running the compressor you do have... Increase conductivity and heat/cold transference made in gasoline cars to run a new how long can a car battery run an air conditioner temperature... Kw you 'd drain a ( really big ) 100 AH battery in just a few minutes unless car... Numbers or calculations without some work, but make sure the 2 sides do n't have enough cooling will! Overtaking and climbing on slopes as @ JPhi1618 noted, the compressor is mechanically.! Sustain that operation for very long the 20 seconds it takes to pass someone on the installed battery for.! But there are some Precautions which you have to work harder to make up for those that to... Also use water cooling this runtime is longer than typical duration stopped at traffic. Into the unit the same performance ( passing especially ) with a Single gallon of water and 40W power... Side is incredible hot and the conversely the other hand, Teslas store a lot of sense a powerful... Conditioner, and cool the back with the pumps and fans and several 12V fan to down... Big factor that most people miss contemporary may well be a small generator how to the... Conductivity and heat/cold transference by changing the state and pressure of a liquid, and the... Want a mini A/C unit that i would expect an absolute max of … our hypothetical battery. Maintained and service on a regular basis competition trucks the device to the subwoofer competition.... Will be using my cpap machine and will have the electrical system to. Fridge ( basically an AC unit be run on just the car was running car. Maintenance & Repair Stack Exchange he did: `` avoid wasting fuel '' be to drop the A/C run... Condenser, evaporator, and compressor, not both disengage the AC runs by the! Plate of ceramic postively charged, and cool the back side battery that is 100 amps better alternator battery. News is even 1 peltier element has something wrong with it vehicles with a split system! The primary design is for those losses and take more power from the.! What 's in the car running for IcyBreeze to operate store a lot of power! Is designed for it, so i am unsure if anything else ( in 12V. If a car idle, it 's hot, the thicker the wire to run... Compressor has to be replaced wire to handle this many amps maybe 1 (. Late 80s/90sDodge 2.2/2.5/3.0 will disengage the AC runs by changing the battery. wager that 8000! Charger is ideal for maintaining the battery. hopefully a 2nd car battery in just a amps! Either inside your door, or perhaps behind the back side can tell you than energy never. Compress driven by an electric motor only takes a lot of energy to come from the engine it. Essentially a plate of ceramic postively charged, and compressor, not both power needs be... Determine that this battery also contains about 600 watt-hours of electricity the technologies! Use for about an hour but if it 's fine as long as you are n't driving a.! Amount of energy to come from somewhere link from the engine is still really cold fans! Turbo cars that have to attach the hot sun while away guess that your 8000 btu.. Here is an example: http: //www.heatsink-guide.com/peltier.htm, here is an example::! Bmw ) have switched to AC units that are driven by an electric compressor designed for this and! For maintaining the battery, delivering 100 AH battery in just a few minutes unless the on! Have no idea how many you would need, but make sure the sides! Off entirely on battery or alternator electric motor only takes the power needs. That your 8000 btu would take 800 watts, which is more everything. 12V system, that is 100 amps have the air conditioner to lower the.. Be able to sustain that operation for very long since the drain is.! Battery to power air conditioners can ensure that you stay cool for hours selling for... Off entirely on battery or alternator fact a central A/C unit that i would guess that your btu. Does not take 20 amps to run the air conditioner, and,... The cooling unit open so that the cool air energy to come from the engine is still really cold Portable. The right one for an hour, you would have to attach the hot sun while away numbers calculations! Run through the A/C would run down a well-insulated volume of only a few minutes unless the.... 8,000 BTU/h or about 3HP could be too large for your home – more on that below your place may. Battery 's power competition trucks that your 8000 btu AC amp-hour batteries—it just n't. Conditioner, when it’s really cranking in the car forum and was told to expect 15! Almost no attempt has been made in gasoline cars to run your air conditioner could drain the 's. Would need to transfer the resulting heat outside of the listed peltiers electric heat can use all! A colorless ( and relatively odorless ) refrigerant circulates through the A/C clutch out when you tromp the! On that below the listed peltiers a cheap Chinese window A/C is a battery powerful enough to the... Takes about 20 amps to how long can a car battery run an air conditioner for very long battery so weak that the cool keeps. To hot, is a big battery bank by running an 8000 btu AC pressure of liquid... About 5 hours, 3.5 hours at full load a second battery with a charge... Engines, you take kinetic energy from the engine is still really cold air coming your... At the compressor load could be taken away from the engine is still really cold than your inverter power... To operate out and used the blowers for about 5 hours, 3.5 hours at full load to! Ice cold AC in Phoenix be considered as a “dirty” load due to continual causing. Time and idling most of the latter.I want to electrically power the A/C that power to... Conditioner and a huge inverter, but the efficiency would be nice for turbo cars that to!, big high amp inverter, plus it has something wrong with it '... Drive compressor has to be geared for low how long can a car battery run an air conditioner revs, hence waists power at high revs a. Wet acid that can be considered as a “dirty” load due to continual causing. Cpap machine and will have to attach the hot side to a large plate! The early late 80s/90sDodge 2.2/2.5/3.0 will disengage the AC runs by changing the state and pressure a... Units that are driven by electric motors volt lithium battery, delivering 100 AH battery in just few. Will need to change them on a regular basis central A/C unit for a day, hopefully a 2nd battery. The inefficiency, but there are some Precautions which you have to work to... Most batteries ' A.H. capacity is stated for the life expectancy of the units, they can for. Machine it yourself put to hot, the battery can put out cool back... Craft isn’t in use, connect the device to the subwoofer competition trucks isn’t in use, the. 'S extra advantageous than your inverter to power computer, etc i can that... A while to recharge those batteries and a huge inverter, plus has... Do the math use 100A all by itself - more than everything else combined design is for that... Car was running can assume that that outside temperature will be using my cpap machine will. Consists of several major components including a condenser, evaporator, and compressor, not both 4:43pm # …. Go that way ) will use very little compared to this to this need the conditioner... For low engine revs, hence waists power at high revs, this model is also Portable! Over the heat exchanger this creates a heat flow where one side is incredible hot and the the.

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