Fully-charged, our YELLOWTOP and BLUETOP (except for the 34M) batteries will measure about 13.0-13.2 volts. Lights depending on the watts, whether its 60 watts or lesser. This means that even the simplest daily operations inside the RV won’t proceed as expected. They’re two different batteries designed to do different things. More importantly, it lets you run your appliances off of stand… For the perfect setup you will absolutely need at least one auxiliary deep-cycle battery to run your fridge and 12v accessories this is because if you run it off your starter battery, you risk draining the battery too flat and not being able to start the engine again. Running (9) 17W lights 120 V AC using an inverter powered by two 105 Amp-hr deep cycle AGM batteries in parallel. Planning the usage and having a good generator to recharge the batteries and run some of the AC appliances will be needed. 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. How long will my OPTIMA battery power my refrigerator. And, you will need to use generator more often and even the battery would drain faster. Some people keep the charger connected continuously. C (amp hours) = 0.12 Amps * 24 hours = 2.88 amp hours (keep going, not done calculating yet) Step 2. Connecting batteries in series increases the voltage but not the amps. Average run cycle is 10 hours. 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. Well, it depends on lots of factors and battery may not be the ideal way to power refrigerator or any other bigger appliances. Save fuel. Also, if you use the refrigerator more often then the drawn amps will be more. A RV refrigerator on an average would draw around 150-180 watts while running. However, there are other factors to consider. But....the fridge motor does not need to run all the time, in fact this model indicates it only needs to run about 15% of the time. So, get your priorities right and put on the devices on DC power accordingly. 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 . Deep Cycle batteries will last a long time if you use a smart-mode converter/charger unit and never ever let your batteries get below 10.5VDC charge state. NOTE: These times assume you discharge the deep-cycle battery 70% (30% of total charge remaining), and they assume that your battery has 100% of its' listed capacity. This charge may be from the vehicle's alternator, a portable generator, or an appropriately sized solar panel. No matter whether you have a travel trailer or a class c RV make sure the batteries are given enough care and proper charging. 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. More amp hours the batteries give more the number of hours refrigerator will run. This fridge can operate over a period of 133 hours, or 5.5 days if the guidelines** are meet. Thus having the right refrigerator matter a lot. Now that we have some numbers about the battery and the motor we can start putting it all together. then run an inverter off the deep cycle to power fridge and a few misc. And thus, if you have residential refrigerator in your motorhome then better have a high amp hours battery. Amps drawn are basically the per hour wise and with a normal RV battery of around 100 amps you can easily count on the hours. for accessory loaded vehicles. If you have the luxury of charging batteries once in a day, then it shouldn’t be a problem for you. So, what do you do while traveling. Look for Group 24, 27, or 31 deep cycle batteries. Here is the my previously posted detail guide on RV AC watts consumption. Getting a good battery like this one on amazon is thus critical. Make sure that the batteries remain fully charged. So if a refrigerator consumes on average 1 amp per hour, and is the only appliance running from a 100 amp-hour battery, you should be able to have the refrigerator run for around 80 hours before recharging becomes necessary. If you were to swap the batteries over, you would probably find that they would still work. OPTIMA® batteries have very low internal resistance, which can allow them to operate well beyond their specified ratings. Check out our tips and support section. Make sure you charge the batteries fully before turning off the charging. Therefore a 100ah (amp hour) battery will last for 1000 hours. Pack the refrigerator properly. This may allow the refrigerator in this application to operate well beyond ten days. You really need to re-charge when the batteries get down to only around 12.0VDC which is considered 50% drained. Can use ice bags to supplement as a cooling agent, Have a small battery fan to circulate air inside the refrigerator, If you make long halts don’t forget to turn on the refrigerator on propane. Let us help. Many applications that include refrigerators also have other electrical accessories, like lights, radios, etc... which may also draw current. Equipped with premium cranking power and impressive cycling capability, they are perfect We frequently come across questions from consumers who want to purchase a battery to power their accessories, but don't know how much run time they will get in their application. This will allow for longer usage. A typical deep-cycle RV battery will be rated around 80 amp-hours, which in theory would supply one amp for 80 hours. 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. Our BLUETOP batteries are high-performance AGM marine batteries Lets assume my motor is the Endura 30 mentioned above, and I troll at speed 2, which is 10 amps draw. I'm currently travelling Aus and I just took the century marine battery out of my boat. A 3 way refrigerator comes with propane and DC battery as source apart from the AC power source. If you were to swap the batteries over, you would probably find that they would still work. For example, we will run the refrigerator for an hour and then turn it off to run the well pump. For example, if your pump is drawing 120 mA and you want it to run for 24 hours. Let’s assume this is tested in a laboratory where the outer temperature is 90°F or 32°C. Include frozen food if possible. propane is a good alternative to shore power except when you are going down the road. Subscribe to our newsletters now and stay up to date with new collections, the latest trends and exclusive offers. So, keeping a closer look and charging them once in while during winter is recommended. chargers for laptop, etc. Deep-cycle batteries are a type of lead-acid battery, and is similar to the one you can find in boats and golf carts. 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. You may want to defrost the fridge once in while only though. Having said this about lights, you don’t really have to replace all the lights. An LED light would consume way lesser than normal lights. If you like to camp in RV parks and mostly run using shore power, your needs will be minimal. 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. You do not need to run a generator full time to keep your freezer or fridge cold during a power outage! The batteries will need to deliver 20 Amps to run the refrigerator (240 Watts/12 Volts = 20 Amps). A refrigerator too can be powered using a 12 V dc battery. 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. Most common dometic or narcold refrigerators made specially for RV can last for around 6 to 8 hours on 12 V DC battery depending on the size of the refrigerator. 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 … Keeping the batteries not fully charged during storage will also affect the batteries. To increase the amps, connect batteries in parallel. But that too will not last long. 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. Well, it is not only going to be refrigerator but also few other appliances along with lights that will need battery. 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. But, running a propane fridge during travel is not ideal and you should avoid it. First, a quick lesson in electronics for those who don’t quite understand what an inverter does. Lets assume my deep cycle battery has an RC rating of 140. 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 Go through my detailed post that discusses more on RV batteries life and maintenance. A starter battery is designed to use a lot of power for a short period of time (starting a car). I am going to build a portable battery pack from Leaf modules soon. On an average with good care and charging as per recommendation a RV battery can last for more than 5 years. It is generally recommended that deep cycle lead-acid batteries should not be discharged beyond 50%, so we don't want ot use more than 225 Ah. 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. 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. If you run a fridge, lights and a few other bits of gear and mostly use it on weekends – get the Adventure Kings AGM Deep Cycle Battery 115AH. I'm currently travelling Aus and I just took the century marine battery out of my boat. We recently came across one example that we'd like to share with you, to give you a rough idea of what to expect. Many applications that include refrigerators also have other electrical accessories, like lights, radios, etc... which may also draw current. It isn’t good to run a battery all the way down to zero during each charge cycle. The watt meter shows that the fridge generally draws between 0 and 45W which seems fairly consistent with the 986Wh per day rating. Also, some people get the generic WalMart batteries or Costco deep-cycle batteries because they have a good warranty. It takes a whole lot more than a refrigerator does. 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! While you are bondocking, apart from generator you also need to use batteries to power some of the appliances. An in-vehicle or hard-wired setup is often around 100 Ah. Features like climate control will add on the amps drain as well. Your refrigerator will run for 8 – 10 hours with the batteries on. Keep the refrigerator doors closed most time and open only when needed. Like having a LED lights instead of normal ones will save a lot. 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. First, a quick lesson in electronics for those who don’t quite understand what an inverter does. In this case, a single group 24, 12 v deep cycle battery rated around 80 Amp hours will be sufficient. If you are boondocking, one can also use solar panels to charge the battery during day times. It uses ammonia and hydrogen that mixes with water to produce the cooling effect. 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. If you are going to put other appliances or components on battery as well, then be sure they are efficient enough . You can check this RV refrigerator on amazon, its the right one for many of us. Whereas a deep cycle battery is designed to deliver low amounts of power continuously for a longer period. If the battery fails, none of the above mentioned electronics will function properly. 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. So, point of the matter here is, use the refrigerator minimal way and minimum features ON. Defrosting again will take more watts. I was running a stock Panasonic starter battery, NOT a deep cycle which explained why my fridge kept shutting off after a few minutes. So in theory the battery when full should sustain the fridge 102/2=51 then 50/2.5=20 hours ? 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. You need to calculate the usage of all your appliances and then configure the batteries. A starter battery is designed to use a lot of power for a short period of time (starting a car). You do not need to run a generator full time to keep your freezer or fridge cold during a power outage! While boondocking you will mostly be using the lights, refrigerator and other appliances like microwave or water pump occasionally. I have a 24vdc input 5000watt/20000watt psw inverter. A battery bank designed to power an average American household for three days would need to supply 90 kilowatt-hours of energy. With RV being moving vehicle, the absorption mechanism works best for them. Just focus on which are the ones that get used most and plan for the replacements. RV refrigerator are different than normal house refrigerators, they run on an absorption mechanism and do not have any moving parts. In short, it turns battery power into useable household-type power. With this, check the meter reading and see how many amps are being drawn. Solar panels have also become popular with increasing efficiency and the cost not so very high. When autocomplete results are available use up and down arrows to review and enter to select. In short, it turns battery power into useable household-type power. Most common dometic or narcold refrigerators made specially for RV can last for around 6 to 8 hours on 12 … COPYRIGHT © 2020 CAMPER GRID - ALL RIGHTS RESERVED, article on how much amps does a RV refrigerator actually consumes, Can you replace rv refrigerator with a standard refrigerator, RV battery – 14 things every RV owner should know, here is a post that i had published on keeping refrigerator cool while traveling, What Makes Airstream Trailers Expensive and Popular, RV Air conditioner leaking – reasons and solution, How Much Do Pop Up Campers Cost (With 14 Examples), Top 10 Best Travel Trailers For Full Time Living, Top 10 Best Class C Motorhomes For The Money. They are about $60-$80 each. With undercharging, the time that a battery can hold reduces and over time they will stop charging completely. Deep-cycle batteries are a type of lead-acid battery, and is similar to the one you can find in boats and golf carts. If there are other accessories connected to the same battery, the runtime may decrease significantly, depending on the demand of those other accessories. 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. For the purposes of this example, we will be focusing on the 75 amp-hour number. 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. Batteries are to be charged only to the point its needed and do not overcharge them. Looking for suggestions? Having more number of batteries will provide for more hours. How Long Will My Motor Run. How long would my setup last With 2 way refrigerators being more common now, you are left with only propane as the source while traveling. I've camped for 7 nights running an engel 60ltr fridge/freezer set at -4 with a 120w solar panel. Well, there are multiple things that can be done, here is a post that i had published on keeping refrigerator cool while traveling. Furthermore, it should be a deep cycle one, and can operate based on the run-time expectations, with the engine turned off. An inverter is an electrical device that converts 12-volt power into 120-volt power. The batteries will need to deliver 20 Amps to run the refrigerator (240 Watts/12 Volts = 20 Amps). A refrigerator when in running condition may not be a high power eating appliance but an air conditioner is definitely consumes more. If the battery fails, none of the above mentioned electronics will function properly. Running (9) 17W lights 120 V AC using an inverter powered by two 105 Amp-hr deep cycle AGM batteries in parallel. 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. Its small thing but makes an impactfull difference. 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. Average run cycle is 10 hours. This means, if you have a 100 amp-hour deep cycle battery, you can assume 50 amp-hours of usable power. This means that the fridge will consume 216-watt hours per day. 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. While going down the road, if you make halts in between then make sure to turn on the propane as source. Like connecting two 12 volts batteries in parallel will provide you more than 150 amps. A refrigerator requires lots of power. Here is how you can power your refrigerator with a battery in an emergency!This Inverter can be used: http://amzn.to/2xHBlXw¿Hablas español? Therefore, the A.H. drain will be 160 A.H. The largest batteries we manufacture are our Group 31 batteries (pictured), which are 75 amp-hour batteries with a reserve capacity of 155 minutes. i plan to replace my standard battery with a deep cycle connected to the alternator. How to keep food cool during the on road 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. Your refrigerator will run for 8 – 10 hours with the batteries on. Think it's a 720. Dometic CoolPower RAPS44 - This is a portable heavy duty 12 V battery that is the ideal choice for running a portable compressor fridge or freezer for long periods of time. Much better than lugging around a heavy 200Ah FLA battery and 30% more usable energy too. While running the refrigerator in RV on shore power or direct hookup is the best, you also get option to run on other sources. It can be confusing. OPTIMA® batteries have very low internal resistance, which can allow them to operate well beyond their specified ratings. 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. This may allow the refrigerator in this application to operate well beyond ten days. chargers for laptop, etc. Notify me of follow-up comments by email. Along with 110 V electricity power they also run on propane and DC battery as explained above. 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 … When replacing your batteries, first check your battery compartment and document the depth, height and width. A residential refrigerator normally needs more watts and thus running them off battery is difficult. 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. Battery Cycle life considerations. That’s alternating current, not air conditioning. Another important point to make sure is, do not be dependent on battery alone. So, if a refrigerator consumes on average 1 amp per hour, and is the only appliance running from a 100 amp-hour battery, you should be able to have the refrigerator run for around 50 hours before recharging becomes necessary. Even with automatic chargers, that turn off on themselves there is a slight chance of overcharging. 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. 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. Why Pairing An ArkPak With Your ARB Fridge/Freezer Is A Good Idea If you compare this with other appliances then air conditioner is other appliances that consumes similar or more watts. Having most of your appliances on DC power in parallel will lead to draining of the battery. Typically, refrigerators operate about 1/3 of the time (1/3 "duty cycle"), or 8 hours a day. 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. That means someone who only discharges their battery to 80% may see 100-200 more cycles than someone who discharges their battery to 60% (approximate numbers cited only as a rough example, that can vary significantly in a given application). Divide that by 2.4 and I get about 58 amp hours. That makes a quality battery maintenance device an excellent investment for any vehicle or application that doesn't see regular use or may deeply-discharge batteries. Yoganand is a RV enthusiast who spends countless hours researching and learning various things related to RV camping. Battery Cycle life considerations. The advantage of using a good quality deep cycle Lithium Battery is your depth of discharge can go down to 75%. While the batteries provide for power in condition that have no other sources, it is necessary that you take sufficient care of them. Having more number of batteries will provide for more hours. I've camped for 7 nights running an engel 60ltr fridge/freezer set at … Will deeply-discharging a battery in an application like this ruin the battery? A deep cycle battery is designed to use a little bit of power for a long period of time. This time is less for a long road trip. 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. Hotter temperatures may make the fridge work harder and consume more energy, as would opening and closing the fridge repeatedly throughout the day. For example, if you connect two 6 Volt batteries in series then that will give you 12 V but the amps wont increase. A typical deep-cycle RV battery will be rated around 80 amp-hours, which in theory would supply one amp for 80 hours. Not nearly as long as a deep cycle auxiliary battery or power pack. i plan to replace my standard battery with a deep cycle connected to the alternator. Therefore, the A.H. drain will be 160 A.H. About 58 amp hours now and stay up to date with new collections, the shallower a discharge,! Have a 100 amp-hour deep cycle one, and can operate based on the run-time expectations, the..., one can also use solar panels have also become popular with efficiency... 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Down the road running a propane fridge during travel is not only refrigerator but also other appliances or components battery...