Let’s assume this is tested in a laboratory where the outer temperature is 90°F or 32°C. How to keep food cool during the on road time. So, while bondocking how much battery do you really need then? 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. Batteries are a form of DC or direct current. 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. This fridge can operate over a period of 133 hours, or 5.5 days if the guidelines** are meet. 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. Deep-cycle batteries are a type of lead-acid battery, and is similar to the one you can find in boats and golf carts. Also, putting your batteries for microwave or air conditioner may not be a practical way and thus avoid as far as possible. propane is a good alternative to shore power except when you are going down the road. Also, if you use the refrigerator more often then the drawn amps will be more. If you were to swap the batteries over, you would probably find that they would still work. That’s alternating current, not air conditioning. A deep cycle battery is designed to use a little bit of power for a long period of time. 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. Click to see full answer But that too will not last long. then run an inverter off the deep cycle to power fridge and a few misc. Most common dometic or narcold refrigerators made specially for RV can last for around 6 to 8 hours on 12 … i'm trying to figure out just how long this fridge could run without running the engine to charge battery. 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 Another important point to make sure is, do not be dependent on battery alone. 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. An inverter is an electrical device that converts 12-volt power into 120-volt power. Mostly the automatic ones, but that can be bad for the batteries. Need a new boat battery? Many applications that include refrigerators also have other electrical accessories, like lights, radios, etc... which may also draw current. chargers for laptop, etc. This will allow for longer usage. You can check this RV refrigerator on amazon, its the right one for many of us. Typically, refrigerators operate about 1/3 of the time (1/3 "duty cycle"), or 8 hours a day. And, you will need to use generator more often and even the battery would drain faster. 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. This charge may be from the vehicle's alternator, a portable generator, or an appropriately sized solar panel. How Long Will My Motor Run. An in-vehicle or hard-wired setup is often around 100 Ah. However, the shallower a discharge cycle, the longer a battery is likely to last. I have a 24vdc input 5000watt/20000watt psw inverter. 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 means that the fridge will consume 216-watt hours per day. With multiple power options you can always switch between them and take the advantage. Home electric systems and most appliances run off of AC. 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. Divide that by 2.4 and I get about 58 amp hours. Your refrigerator will run for 8 – 10 hours with the batteries on. 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! Along with 110 V electricity power they also run on propane and DC battery as explained above. 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. Therefore, the A.H. drain will be 160 A.H. Use the battery only when its absolutely needed and switch to propane or shore power as-and -when you get the chance. The largest batteries we manufacture are our Group 31 batteries (pictured), which are 75 amp-hour batteries with a reserve capacity of 155 minutes. Most common reason why RV batteries fail early is because they are undercharge or even overcharged. Lets understand series and parallel connection in battery. With residential refrigerator, boondocking with shore power will be difficult. We recently came across a consumer, who purchased one of our Group 31 batteries to power his fridge on a camping trip. 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