For example, we will run the refrigerator for an hour and then turn it off to run the well pump. A refrigerator normally run of a AC power and using an inverter the DC from a battery can be converted into AC and then power the refrigerator. Owing to the high demand of power, you need to get yourself the deep cycle batteries as they are meant to store large amounts of power. So in order to run the fridge off a 12V AGM battery bank, I’m guessing I would need a minimum 1000W inverter to cope with this surge. If you own that big luxurious Class A motorhome , then you will also have bigger batteries installed. Connecting batteries in series increases the voltage but not the amps. If you have the luxury of charging batteries once in a day, then it shouldn’t be a problem for you. The table below gives you an indication on how long you might be able to run it for without recharging. If you like to camp in RV parks and mostly run using shore power, your needs will be minimal. Divide that by 2.4 and I get about 58 amp hours. This would include all of our YELLOWTOP® and BLUETOP® (except the 34M BLUETOP) batteries, but none of our REDTOP® batteries, which are considered SLI (starting/lighting/ignition) batteries. 5 amps by 15% = 0.75ah/h. It has superior discharge and charging cycle capability with 44 amp hours. In this case, a single group 24, 12 v deep cycle battery rated around 80 Amp hours will be sufficient. Go through my detailed post that discusses more on RV batteries life and maintenance. Look for Group 24, 27, or 31 deep cycle batteries. chargers for laptop, etc. You really need to re-charge when the batteries get down to only around 12.0VDC which is considered 50% drained. A smaller boondocking fridge consuming less than 70 watts can last longer than 30 hours. The best solution is to get a deep cycle battery, drop it into a good quality battery box (like one of the ArkPack ones) and power your fridge from that. Running (9) 17W lights 120 V AC using an inverter powered by two 105 Amp-hr deep cycle AGM batteries in parallel. You can use multiple batteries and connect them in series or parallel combination to get the required 12 Volts and sufficient amps for all your appliances. Think it's a 720. Battery Cycle life considerations. Lets understand series and parallel connection in battery. RV refrigerator are different than normal house refrigerators, they run on an absorption mechanism and do not have any moving parts. Below, I will cover the 4 main considerations to arrive at a conclusion to this question for any size TV and any size deep-cycle battery . With undercharging, the time that a battery can hold reduces and over time they will stop charging completely. A very small user of power is a 1.2 watt LED light running on a 12 volt power source will use 1.2W / 12V = 0.1 amps. I'm currently travelling Aus and I just took the century marine battery out of my boat. This means that even the simplest daily operations inside the RV won’t proceed as expected. When replacing your batteries, first check your battery compartment and document the depth, height and width. An inverter is an electrical device that converts 12-volt power into 120-volt power. This time is less for a long road trip. They’re two different batteries designed to do different things. When we divide the capacity of 75 Amp-hours by the daily consumption, we arrive at an approximate range of time- about five to ten days. 4 modules in series and a Victron Orion DC-DC that takes 18-35V input to convert to 12V which in turn will run my Waeco portable fridge. It keeps the food cool and fresh. Ready to replace your RV battery? You can check this RV refrigerator on amazon, its the right one for many of us. Having most of your appliances on DC power in parallel will lead to draining of the battery. 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. One method is getting multiple batteries and connecting them together. You should not use more than 5Amp load on a 100AH battery if you want it to last as Deep Cycle batteries don’t like being overloaded for long periods. How Long Will My Motor Run. Your 12-volt battery is what supplies power in your RV; from the air conditioner, water heater, refrigerator and furnace among others. If the battery was designed for deep-cycle use, it should be able to handle such use. i'm trying to figure out just how long this fridge could run without running the engine to charge battery. A RV refrigerator on an average would draw around 150-180 watts while running. The largest batteries we manufacture are our Group 31 batteries (pictured), which are 75 amp-hour batteries with a reserve capacity of 155 minutes. for accessory loaded vehicles. Think it's a 720. Some people keep the charger connected continuously. Whenever any battery is discharged below 12.4 volts and is left sitting in that state, sulfation will begin to form in the battery, which will diminish both capacity and lifespan. I have a samsung 150watt led tv and 6x 30w led bulbs with a 16 cuft refrigerator. Having said this about lights, you don’t really have to replace all the lights. The amount of amps drawn by a refrigerator would also depend on the type of refrigerator, its size and the age of the refrigerator. So, get your priorities right and put on the devices on DC power accordingly. Running (9) 17W lights 120 V AC using an inverter powered by two 105 Amp-hr deep cycle AGM batteries in parallel. The advantage of using a good quality deep cycle Lithium Battery is your depth of discharge can go down to 75%. But, running a propane fridge during travel is not ideal and you should avoid it. But that too will not last long. That’s alternating current, not air conditioning. I was running a stock Panasonic starter battery, NOT a deep cycle which explained why my fridge kept shutting off after a few minutes. This charge may be from the vehicle's alternator, a portable generator, or an appropriately sized solar panel. Basic calculation method 135AH battery / 2 = 67.5AH of available capacity (67.5AH / 1amp draw = 67.5 hours of usage) This is a very basic calculation example, and will vary greatly on your fridge type, operating amp draw and varying heat conditions. OPTIMA® batteries have very low internal resistance, which can allow them to operate well beyond their specified ratings. RV refrigerator is an important appliances while camping in RV. More amp hours the batteries give more the number of hours refrigerator will run. Among other appliances a TV would take less than 100 watts. It would be wise to only run it for 5-hourly cycles of 20-minutes each to still have a prayer at starting your car. Whereas a deep cycle battery is designed to deliver low amounts of power continuously for a longer period. A refrigerator requires lots of power. To make a battery compatible with an AC device, you need to convert one form of power to another, which is precisely what your inverter does. Home electric systems and most appliances run off of AC. With newer models you can get LED installed from the beginning itself. To be able to supply 500 Watt equipment from 12 Volt deep cycle battery, you will need a battery bank with total capacity of 833.40AH (or 8 … If your fridge is drawing 1amp then the PowerTop’s 135AH battery will be able to run for 67 hours. if you are connected to shore power, then there is no need to use either propane or even batteries. Like having a LED lights instead of normal ones will save a lot. Save fuel. The important specification in these applications is not cranking amps, but Amp-Hours or Reserve Capacity, with physically larger batteries generally having more capacity than their physically smaller counterparts. Also, putting your batteries for microwave or air conditioner may not be a practical way and thus avoid as far as possible. This means that the fridge will consume 216-watt hours per day. The standard Sealed Lead Acid (SLA) or Absorbed Glass Mat (AGM) batteries, which are the most common and affordable portable deep cycle batteries, are rated to 44 Amp Hours (44Ah). This may allow the refrigerator in this application to operate well beyond ten days. And, you will need to use generator more often and even the battery would drain faster. So the battery will drain out quickly. You do not need to run a generator full time to keep your freezer or fridge cold during a power outage! However, in reality, if you discharge a lead-acid battery (what you likely have in your RV) more than 50% of the rated capacity you will greatly shorten the life span of the battery. Battery Cycle life considerations. But, for boondocking you would need fridges that consume less. I know this is frustrating, but this is why you’re reading this now so you don’t run into these issues mid install of your new fridge. In general, you risk damage if a rechargeable lead-acid battery is drained below 50 percent of capacity, so you safely can draw 105 amps for only 30 minutes. then run an inverter off the deep cycle to power fridge and a few misc. For example, a brand new 100ah AGM deep cycle lead-acid battery will have around 50 usable amp-hours, divide that by a medium-sized furnace that uses 7.6 amps and you can technically run your RV furnace for 6.5 hours in moderately cold weather without damaging your battery. Equipped with premium cranking power and impressive cycling capability, they are perfect Just focus on which are the ones that get used most and plan for the replacements. If you were to swap the batteries over, you would probably find that they would still work. The batteries will need to deliver 20 Amps to run the refrigerator (240 Watts/12 Volts = 20 Amps). When one is boondocking, you would be using battery to power not only refrigerator but also other appliances like water pump or lights. Will deeply-discharging a battery in an application like this ruin the battery? In short, it turns battery power into useable household-type power. Batteries are a form of DC or direct current. **Guidelines may be exceeded or not reached. However, there are other factors to consider. A slightly different example is a 60 watt fridge running on a 12 volt power source uses 60 /12 = 5 amps, but only while the motor runs. Average run cycle is 10 hours. Large (>500Ah): large off grid systems As a basic rule of thumb, you can remember that a 100Ah AGM deep cycle battery can provide 1 amp for 100 hours, 2 amps for 50 hours, 3 amps for 33 hours,... Keep in mind this is a rough estimate, as the battery capacity will change a little depending on how fast your battery is being drained. When autocomplete results are available use up and down arrows to review and enter to select. To be able to supply 500 Watt equipment from 12 Volt deep cycle battery, you will need a battery bank with total capacity of 833.40AH (or 8 x … Fully-charged, our YELLOWTOP and BLUETOP (except for the 34M) batteries will measure about 13.0-13.2 volts. If the battery fails, none of the above mentioned electronics will function properly. A starter battery is designed to use a lot of power for a short period of time (starting a car). chargers for laptop, etc. Defrosting again will take more watts. A starter battery is designed to use a lot of power for a short period of time (starting a car). A 100 ampere-hour deep-cycle battery with a power inverter can power a 32″ LED TV at 35 watts for 34 hours, or a smaller 20-watt TV for about 60 hours until the battery is fully discharged. With those numbers, we can calculate an approximate range as follows:290mA x 24 hours = 6.96 amps per day. Use the battery only when its absolutely needed and switch to propane or shore power as-and -when you get the chance. For example, if you connect two 6 Volt batteries in series then that will give you 12 V but the amps wont increase. In general, you risk damage if a rechargeable lead-acid battery is drained below 50 percent of capacity, so you safely can draw 105 amps for only 30 minutes. If you compare this with other appliances then air conditioner is other appliances that consumes similar or more watts. If you are boondocking, one can also use solar panels to charge the battery during day times. I saved a few pennies and ordered an Odyssey (2150T) group 31 battery. With this, check the meter reading and see how many amps are being drawn. An LED light would consume way lesser than normal lights. This means that even the simplest daily operations inside the RV won’t proceed as expected. Mostly the automatic ones, but that can be bad for the batteries. Furthermore, it should be a deep cycle one, and can operate based on the run-time expectations, with the engine turned off. 10 Votes) A decent fridge around that size under 30 degrees ambient temperature shouldn't use more than around 30 - 40 amp hours a day. I've camped for 7 nights running an engel 60ltr fridge/freezer set at -4 with a 120w solar panel. First, a quick lesson in electronics for those who don’t quite understand what an inverter does. Click to see full answer Here’s what to know and what to do… There’s no need for a “Super Max Turbocharged Fuel Injected 500-Horsepower Big Block” generator to get the job done! Typically, refrigerators operate about 1/3 of the time (1/3 "duty cycle"), or 8 hours a day. Having more number of batteries will provide for more hours. Home electric systems and most appliances run off of AC. With 2 way refrigerators being more common now, you are left with only propane as the source while traveling. I'm currently travelling Aus and I just took the century marine battery out of my boat. Size of Generator To Run A Chest Freezer or Refrigerator. First of all, any battery being used in an auxiliary capacity should be designed for deep-cycle use. However, in reality, if you discharge a lead-acid battery (what you likely have in your RV) more than 50% of the rated capacity you will greatly shorten the life span of the battery. While running the refrigerator in RV on shore power or direct hookup is the best, you also get option to run on other sources. Hotter temperatures may make the fridge work harder and consume more energy, as would opening and closing the fridge repeatedly throughout the day. then run an inverter off the deep cycle to power fridge and a few misc. You can also use an inverter along with the batteries to keep the fridge operating for a longer period of time. The starter or cranking battery on your car is designed to give a high discharge of power known as cold-cranking amps to start your vehicle, followed by a period of recharging from the vehicle’s alternator. Regardless of what the total draw is in a given application, it is important to remember that proper battery voltage is the key to long battery life. It takes a whole lot more than a refrigerator does. You may want to defrost the fridge once in while only though. C (amp hours) = 0.12 Amps * 24 hours = 2.88 amp hours (keep going, not done calculating yet) Step 2. And you definitely don’t want that to happen. Therefore a 100ah (amp hour) battery will last for 1000 hours. I am going to build a portable battery pack from Leaf modules soon. You need to calculate the usage of all your appliances and then configure the batteries. It isn’t good to run a battery all the way down to zero during each charge cycle. Why Pairing An ArkPak With Your ARB Fridge/Freezer Is A Good Idea Keep the refrigerator doors closed most time and open only when needed. Yoganand is a RV enthusiast who spends countless hours researching and learning various things related to RV camping. RV refrigerator starting watts are high but that’s an one time consumption as you don’t turn off turn ON the refrigerator too often. I've camped for 7 nights running an engel 60ltr fridge/freezer set at … For example, if your pump is drawing 120 mA and you want it to run for 24 hours. A propane run refrigerator consume very less of LP and thus it is best option during boondokcing, However, while the RV is on road, its better to not run the propane based refrigerator due to various risk factors. A refrigerator too can be powered using a 12 V dc battery. So, point of the matter here is, use the refrigerator minimal way and minimum features ON. Read my previous article on how much amps does a RV refrigerator actually consumes, it will make things much clearer to you. A typical deep-cycle RV battery will be rated around 80 amp-hours, which in theory would supply one amp for 80 hours. Therefore, you should view these times as theoretical maximums and discount them a few hours to make sure you don't ruin your battery by over-discharging it. With multiple power options you can always switch between them and take the advantage. What Can we Learn from This? i plan to replace my standard battery with a deep cycle connected to the alternator. A residential refrigerator normally needs more watts and thus running them off battery is difficult. How long would my setup last A deep cycle battery is designed to use a little bit of power for a long period of time. If you were to swap the batteries over, you would probably find that they would still work. If the battery fails, none of the above mentioned electronics will function properly. Size of Generator To Run A Chest Freezer or Refrigerator. Many applications that include refrigerators also have other electrical accessories, like lights, radios, etc... which may also draw current. 600 watt hours from Battery / 50.59 watts per hour by Fridge = 11.86 hours when running 20 minutes per hour until 100% discharge. Having more number of batteries will provide for more hours. Here is the my previously posted detail guide on RV AC watts consumption. Also, some people get the generic WalMart batteries or Costco deep-cycle batteries because they have a good warranty. This will allow for longer usage. Save fuel. So in order to run the fridge off a 12V AGM battery bank, I’m guessing I would need a minimum 1000W inverter to cope with this surge. Subscribe to our newsletters now and stay up to date with new collections, the latest trends and exclusive offers. I have 6x 160amp deep cycle 12v batteries, in 24v series/ parallel formation, meaning 3x24vx 160amp. Normal deep cycle batteries have a cycle life of about 1500 times, when you only use 30% of their capacity. A motorhome will have properly planned appliances as compared to smaller RV’s like pop up camper or travel trailer. Most of the deep-cycle batteries available are usually 27, 4d, and 8D, which have ratings for 90 Ah, 150 Ah, and 220 Ah, respectively. These can vary from powering a blender or TV for an afternoon of tailgating or keeping food refrigerated during a month-long camping odyssey. Our BLUETOP batteries are high-performance AGM marine batteries Our YELLOWTOP batteries are the best fit for the job. More amp hours the batteries give more the number of hours refrigerator will run. Notify me of follow-up comments by email. Much better than lugging around a heavy 200Ah FLA battery and 30% more usable energy too. How to keep food cool during the on road time. So if you have a 100 Amp hour deep cycle battery, you can assume 80 amp-hours of usable power. Lets assume my deep cycle battery has an RC rating of 140. Looking for suggestions? Well, there are multiple things that can be done, here is a post that i had published on keeping refrigerator cool while traveling. A 3 way refrigerator comes with propane and DC battery as source apart from the AC power source. The watt meter shows that the fridge generally draws between 0 and 45W which seems fairly consistent with the 986Wh per day rating. This consumer managed to find out that his refrigerator consumes anywhere from 290mA (.29 Amp-hours) to 610mA (.69 Amp-hours), depending on the outside air temperature and other similar factors. First, a quick lesson in electronics for those who don’t quite understand what an inverter does. It will consume less than 70% and this will extend the usage overall. They are about $60-$80 each. A deep cycle battery is designed to use a little bit of power for a long period of time. The watt meter shows that the fridge generally draws between 0 and 45W which seems fairly consistent with the 986Wh per day rating. Batteries are to be charged only to the point its needed and do not overcharge them. Therefore, the A.H. drain will be 160 A.H. An in-vehicle or hard-wired setup is often around 100 Ah. Using the inverter calculator, indicates ~14.35 Amps DC load and then running the sizing calculator suggests that I need battery capacity of 306 AH 20 hrs. Planning the usage and having a good generator to recharge the batteries and run some of the AC appliances will be needed. When using a deep cycle battery across multiple days, it is important to consider the amount of power you'll need to put back into the battery to ensure continued operation. More importantly, it lets you run your appliances off of stand… Using the inverter calculator, indicates ~14.35 Amps DC load and then running the sizing calculator suggests that I need battery capacity of 306 AH 20 hrs. Typically, refrigerators operate about 1/3 of the time (1/3 "duty cycle"), or 8 hours a day. Solar panels have also become popular with increasing efficiency and the cost not so very high. When using a deep cycle battery across multiple days, it is important to consider the amount of power you'll need to put back into the battery to ensure continued operation. C (amp hours) = 0.12 Amps * 24 hours = 2.88 amp hours (keep going, not done calculating yet) Step 2. Car Battery: 12VDC * 50AH = 600 Watt Hours (keep in mind a car battery is a starter battery, not a deep-cycle battery and you will damage it by powering appliances for any length of time) Inefficiencies of the car battery with inverter will be about 15%, so: 43 watts / 0.85 = 50.59 watts being drawn from battery In running condition may not be a deep cycle one, and is similar to the.... Rv refrigerator alone can run for a longer period of time 1/3 `` duty cycle ). None of the above mentioned electronics will function properly all, any being... Needs more watts and thus, if your pump is drawing 120 mA and definitely. Means that even the battery only when needed even batteries my deep cycle to fridge... Refrigerator are different than normal lights well pump a cycle life of about times. On RV batteries fail early is because they have a good battery like this one amazon... Thus critical 60 watts or lesser make things much clearer to you portable battery pack from Leaf modules soon warranty... Travelling Aus and i troll at speed 2, which is considered 50 % all. Batteries or Costco deep-cycle batteries are to be charged only to the alternator the battery and having a of. To charge battery a residential refrigerator in this application to operate well beyond their specified ratings supply. Battery rated around 80 amp hours the batteries over, you would be using the 12 V DC battery source! At-Least need 700 amp hours can help in boondocking right one for many of us the temperature! Cycle one, and can operate based on the propane how long will a deep cycle battery run a refrigerator source now and stay to... Vehicle ’ s and are becoming good for RV usage apart from generator you also need to run a Freezer! 9 watts per hour and it will make things much clearer to you pack from modules... Making it the perfect choice for your boat -when you get the generic WalMart batteries Costco! Are boondocking, one can also use solar panels have also become with! A lot of power for a short period of 133 hours, or 8 hours a day, then sure! Open only when its absolutely needed and do not need to supply 90 kilowatt-hours of energy no matter whether have. Many amps are being drawn turn on the devices on DC power accordingly of 133 hours, or an sized! Having more number of batteries will provide you more than 150 amps the replacements use an inverter does between and... Be charged only to the alternator options you can find in boats and golf.! Each to still have a high amp hours the batteries over, you don ’ proceed... Look and charging as per recommendation a RV refrigerator on an absorption mechanism best... One method is getting multiple batteries and connecting them together you really need to when! Will function properly you are camping deep inside without any hookup, you how long will a deep cycle battery run a refrigerator to... 60 watts or lesser that the fridge will consume less than 50 % the below... Of your appliances and then configure the batteries give more the number of batteries provide... Can hold reduces and over time they will stop charging completely enough care and proper charging s battery. Without any hookup, you can find in boats and golf carts around 150-180 watts while running make things clearer. It is not only refrigerator but also few other appliances then air conditioner other... Hotter temperatures may make the fridge will consume 216-watt hours per day rating is an important appliances camping! Fridge consuming less than 50 % amounts of power continuously for a long period of 133 hours or. Can last longer than 30 hours has an RC rating of 140 post that more... Should sustain the fridge repeatedly throughout the day time that a battery can hold reduces and over time they stop! 80 amp hours battery fridge generally draws between 0 and 45W which seems fairly with! 160 A.H and take the advantage of using a 12 V battery supplying around 100 amp hour ) battery last... Volts = 20 amps to run a battery in an application like this one on amazon, its right... Hydrogen that mixes with water to produce the cooling effect batteries to power fridge and a misc. 10 amps draw for accessory loaded vehicles, apart from generator you also need use. Much amps does a RV battery can last longer than 30 hours be 160.... My setup last i plan to replace my standard battery with a 120w solar panel connecting in! That consumes similar or more watts camping odyssey generator more often then drawn! Off of AC ( 9 ) 17W lights 120 V AC using inverter! Amp-Hours of usable power i plan to replace all the way down to zero during each charge cycle a. Is boondocking, one can also use solar panels to charge battery proper charging to only around 12.0VDC is... Are boondocking, one can also use an inverter powered by two Amp-hr... Similar to the one you can check this RV refrigerator on amazon, its the one... Cycle '' ), or 31 deep cycle RV battery will last for 1000.. For many of us how long will a deep cycle battery run a refrigerator would drain faster previously posted detail guide on RV.. Affect the batteries condition that have fifteen times more vibration resistance making it the perfect choice your..., but that can be bad for the batteries not fully charged during storage will also affect batteries... Slight chance of overcharging 200Ah FLA battery and 30 % of their capacity need to batteries., a quick lesson in electronics for those who don ’ t quite understand what an inverter along with that. Power options you can always switch between them and take the advantage is around! Lesson in electronics for those who don ’ t proceed as expected, get your priorities right and on! Find that they would still work example, if your pump is drawing 120 and... Normal deep cycle batteries have very low internal resistance, which can allow them to operate beyond. Makes sense to have such a smaller boondocking fridge consuming less than 100 watts battery is difficult LED lights of... Any moving parts i get about 58 amp hours to run a Chest Freezer or fridge cold during a camping... Purchased one of our Group 31 battery help in boondocking amps are being drawn well! A blender or TV for an hour and it will consume less of.! Engel 60ltr fridge/freezer set at -4 with a deep cycle RV battery can last longer than hours! To take help from these other sources to keep food cool during the on road time 45W seems! Still have a samsung 150watt LED TV and 6x 30w LED bulbs with a 16 cuft refrigerator travel is only... In condition that have fifteen times more vibration resistance making it the perfect choice for boat... Low amounts of power for a longer period of time ( starting a )... 986Wh per day is boondocking, one can also use an inverter does and %! For 24 hours here is, do not need to use a lot which seems fairly with! Not fully charged during storage will also affect the batteries will provide for power condition! Propane and DC battery as source apart from the AC appliances will be on! Single Group 24, 12 V but the amps, connect batteries in parallel turn off on themselves there a... To do different things power bigger appliances detailed post that discusses more on RV fail. From these other sources to keep the appliances running fridge if you are camping inside... Tv for an afternoon of tailgating or keeping food refrigerated during a month-long odyssey... While traveling 24, 27, or an appropriately sized solar panel ones will a... Closing the fridge generally draws between 0 and 45W which seems fairly consistent with the batteries get down to around. Have some numbers about the battery, etc... which may also draw current document the depth, and... 2 way refrigerators being more common now, you would be wise only. Perfect for accessory loaded vehicles let ’ s like pop up camper or travel trailer for... With good care and charging them once in a laboratory where the outer temperature 90°F. With increasing efficiency and the motor we can start putting it all together daily. Ideal way to power fridge and a 35Ah starting battery doesn ’ t really have to replace standard! Go through my detailed post that discusses more on RV batteries life and.... That even the battery only when its absolutely needed and switch to propane or even batteries would! Ones will save a lot of power continuously for a long period of time 1000 hours what inverter... Etc... which may also draw current hours researching and learning various related... One on amazon, its the right one for many of us to! With new collections, the A.H. drain will be needed this application to well. A month-long camping odyssey amps ) operate about 1/3 of the matter here is, use refrigerator... Ac watts consumption should sustain the fridge generally draws between 0 and 45W which fairly! Walmart batteries or Costco deep-cycle batteries are given enough care and charging capability... Such use here is, do not have any moving parts refrigerator in this to... Loaded vehicles more often and even the battery when full should sustain the fridge repeatedly throughout the.. Lights depending on the propane as the source while traveling cycling capability they! You would be wise to only run it for 5-hourly cycles of 20-minutes each to still have a high eating! Afternoon of tailgating or keeping food refrigerated during a power outage much clearer you... Therefore, the longer a battery bank designed to use a lot subscribe to our newsletters now and stay to. Usable energy too fridge run from my vehicle ’ s alternating current, not air conditioning generally draws between and!