A typical deep-cycle RV battery will be rated around 80 amp-hours, which in theory would supply one amp for 80 hours. A refrigerator should run for 4 to 8 hours before shutting off and going into the defrost cycle. If you are using a lithium battery, you need 52.52 Ah battery to run the same fridge for two days. It basically held my battery and told me how much charge was remaining. No tire does everything perfectly. eval(ez_write_tag([[300,250],'offroadaussie_com-large-mobile-banner-1','ezslot_11',132,'0','0']));Pretty much all cars have a “starter” or “cranking” battery. Its purpose in life is to deliver a huge amount of power for a very short time. A bit less … A 100w solar panel can keep up and probably cheaper than a second battery. We recommend the AGM style (Absorbed Glass Mat) as the best for any Recreational Vehicle, but you can research this more if you want. You need a lead-acid battery of 104 Ah to run an efficient top-loading fridge for two days. To make a fairly accurate estimation, you’ll also need to consider the appliances’ running time. This means that it did not even run for 2 full days. I’d suggest taking a few hours off each estimate just to cover yourself. Not unless you are driving all day, if you are camped somewhere you will flatten the battery. A deep cycle battery is designed to use a little bit of power for a long period of time. 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. For example, a 400 amp-hour battery can supply 4 amperes of current for 100 hours. Also the battery is about 50%bigger again than the battery in your picture so I doubt you could get a battery of any decent capacity in there to be honest. Your typical deep cycle battery, however, is designed to store energy and deliver it at lower amperages for longer periods of time. Since then, I have been contacted by a representative of Ark and given some great information on what you might need to know about your ARB Fridge and battery life. That’s all on battery power. A 100 watt solar panel will during sunlight hours replace the power you use all day. A starter battery is designed to use a lot of power for a short period of time (starting a car). Which means you can power your car fridge for longer between charges. However, the shallower a discharge cycle, the longer a battery is likely to last. They include internal and ambient temperatures, as well as, how often you keep warm foods in the refrigerator or how often you open the refrigerator door. Relevance. And under these conditions a RV refrigerator alone can run for around 4-5 hours using the … There are a lot of variables when it comes to fridge consumption, with the main two being the make and model of the fridge and the ambient temperature it is running at. As far as setting up a second battery just for your fridge, you can buy a quality deep-cycle battery. Also, determine the wattage of any lights or other items you intend to run. So the battery will drain out quickly. I found a place behind the trim in my boot to put mine, but for a while I had it in a battery box so that I could remove it if I wanted to.eval(ez_write_tag([[250,250],'offroadaussie_com-large-leaderboard-2','ezslot_18',137,'0','0'])); The battery box I used was a dumb box. How long do RV batteries last? 2. Cranking batteries can’t be discharged more than about 25% before their lifespan is depleted. A decent fridge around that size under 30 degrees ambient temperature shouldn't use more than around 30 - 40 amp hours a day. I recommend that you do what I have done, and easily measure it yourself. Unlike other car batteries, the RV battery isn’t just used to run some small lights and start the engine alone. The compressor works until it is … Given that a good quality AGM battery is expensive, why wouldn’t you want to get the most life out of it? A decent car battery with a 90-hour amp rating can only run about 400v for a couple of hours. Most golf cart sized deep cycle batteries eg Trojan t-105 can hold around 200-230 amps capacity at 6 volts. That’s handy if you need to power things like laptops etc. Now of course a fridge does not take a continuous current. Most can be discharged to 50% of their capacity before their life is compromised. 1 decade ago. A refrigerator requires lots of power. You’ll also find that 240v socket for powering the laptop, coffee machine, or foot spa. Do it too long and pretty quickly your cranking battery runs out. Most 1500w-2000w applications such as microwaves and electric kettles will only run for a few minutes, this will be fine to use with a 100AH+ battery. This is the one that delivers the power to turn your engine over until it fires up. Whether you are looking for a regular awning or for a rooftop tent so you can sleep on the top of your vehicle, both companies have many... Photo Credit 3. i'm trying to figure out just how long this fridge could run without running the engine to charge battery. That means it’s not a practical solution for longer-term needs, but you could run a mini-fridge like the energy-efficient model in my example for a few hours. 4x4earth is Australia’s largest free and independent 4 wheel drive website, and we display almost 500,000 pages a month and produce Australia’s number 1 automotive podcast. So comparing a 100Ah deep cycle battery and a 35Ah starting battery doesn’t make any sense. Cheers. 3 Answers. volts × amps = watts. how long would a small 240v campervan fridge run if using an inverter powered by a 130aph deep cycle battery? you can work on about 40 Amp/hr per day if in the shade and not in the car. Lastly, the alternator should not be attached to the auxiliary battery via an isolator module, as doing so will cause the inverter to discharge the engine start battery even when it is turned off, which can cause you to waste a lot of electricity needlessly. It would be fine if it ran out at some point on the 3rd day as long as it made it to somewhere around 11AM anyway. ... My battery usually quickly broken, probably because they haven’t run out of battery yet but I still charge or charge too many times. 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. Please consider unblocking ads for 4x4earth.com, or purchasing an annual 4x4earth subscription, which removes the ads on the forum, or you could buy a T-shirt or Polo from the Store, we are currently giving away a free membership for 12 months with each T-Shirt. Do you own an ARB Fridge? 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