how long will a 100ah battery run a fridge

When you draw a big load, the ah capacity is reduced significantly. Rather than compute 100ah literally, it is better to use the 5ah per 20 hour guideline given above. Energy efficient kitchen refrigerators require 1200W minimum during startup, which is equal to the full capacity of a 100ah battery. Any cookies that may not be particularly necessary for the website to function and is used specifically to collect user personal data via analytics, ads, other embedded contents are termed as non-necessary cookies. This sets it apart from the other 100Ah Lithium Batteries on the market. On a long trip, I carry a 900W generator. 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. This is crucial especially if your fridge contains food that could get spoiled. Hi Emily! For the perfect 12v fridge setup, you’ll need at least one auxiliary battery. Yes, are you living on grid or off grid? It could make a difference if you live off-grid because you may require more batteries to store your elect... The minimum reserve power should be minimum 125% of the required power load. We use cookies on our website to give you the most relevant experience by remembering your preferences and repeat visits. If you were to end the day with a 7-8 hour drive and then stop for 8 hours the battery would keep the fridge running worst case. As we pointed out above, we have to account for Peukert’s Law, so the battery might only last 6 hours. 5 amps for 20 hours does not necessarily mean 10 amps for 10 hours. A fridge drawing only 55 DC amps can be run for about 60 minutes of continuous duty off a 105 ampere-hour battery. A 12v fridge lets you take your camp cooking to the next level . But use the battery more than 20 hours and it will no longer work at full power. A refrigerator needs a lot of power, and your RV battery bank is finite; unlike being plugged in, your batteries will be drained in as little as one day running a refrigerator.. Couldn't you get a multi plug for the 110 outlet in the bed, and run it to the Fridge 110v plug and to the Jackery? A running car could easily power the fridge and recharge the battery. Hi Emily! I’ll summarise the maths: We have a 100Ah battery, but we can only ever use 50% of it’s capacity. So far, all but one has been equipped with the EverChill 10.7 cu. To figure out how long our 12V, 100ah battery will last, follow the steps below. In order to determine the inverter and battery size required you will need to get that calculator out. If you’re new to 12V batteries in general, you may wonder what these numbers mean. Let's review the steps to calculating the amp hours in your battery. Do not mix old and new batteries because the system will reduce the capacity of the new to match with the old. Roughly the 100 ah battery with the 12V DC from the solar panel would take ten hours to charge fully. So a 100Ah Lithium will give 90Ah energy which is the equivalent to 180Ah AGM. if so whatsize cable??? you are planning on charging everything via solar power which can be somewhat sporadic at the best Some people will have a backup battery. If you are not sure how much power your refrigerator uses, it will be stated in the product manual or on the fridge itself. How long will a 100AH/12v battery take to charge? Inverters can also drain your battery quickly unless your engine is running and charging your battery. So figure 80 amps available So somewhere around 80/8.5= 9.5 hours, Then you would want to look at the batteries power curve if … BUY BEST 12V 200AH BATTERY ON AMAZON However, if you have no continual power source e.g. We also use third-party cookies that help us analyze and understand how you use this website. All these replies are using the wrong type of inefficient fridge. Our old unit TOP-LOADING FRIDGE: Homemade most efficient 40L plastic trash drum =... Some thoughts on my overland experience running a fridge/battery long term. Lithium batteries can be drained to 10% capacity whereas AGM should be only 50%. Also, when you are buying more than one of these, keep in mind that you will only get 50% of their full capacity. The higher the amp draw, the shorter the battery life. While you cannot run a 20 cubic foot refrigerator, you should have no problems running a portable fridge. 20.8 watt-hours x (100%/80%) = 26 Ah. Considering your battery is fully empty, and the solar panel is under direct sunlight moderated to capture the maximum sunlight on the solar panel. The bottom line though is a 100ah battery can run a portable fridge, though the duration depends on its usage. During the nights when it was off, it warmed up about 2deg (didn't keep opening it all the time) I also used the battery to run lights around camp etc and the battery had a 1hr charge when went for a drive around the park on Saturday evening. Of course, this depends on how full it is and how cool overnight temperatures are. This is not a problem with lithium ion batteries because you can discharge it 85%-100%. 2) So we have 1200wh available. But opting out of some of these cookies may affect your browsing experience. To keep it simple, you use more battery power with a draw greater than 5 amps an hour. If you want to do more calculations, follow the guide below. The Problem May Lie in the Batteries. The time it takes for your solar panel to charge your battery depends on the current of the panel you choose. So this is the maximum number of units of electricity your refrigerator will be able to use in 24 hours (resulting in no loss of inverter efficiency). Before we can run an estimate though, you have to know a few things: You must also have the following information: A 120V refrigerator consumes 5 to 7 amps, but you must provide it with 15 to 20 amps during the startup. Dual Battery System. But we have to include the effects of Peukert’s Law, so the number will be from 6.5 to 9.7 hours depending on how many amps the appliance draws. Battery capacity will be at 50%, just in time for a recharge. It really depends on how many amps the appliance will use per hour. If you discharge it … So figuring out how long a 100ah battery will run a 100W appliance is not as straightforward as it seems. In hot conditions the battery would run the fridge for a couple of days, as a rough rule of thumb. It works great in bad weather and comes with … if you are boondocking and want to bring a camping fridge, check how many amps it will use. As explained here lead acid batteries – FLA, AGM and gel – only have half the stated capacity available for usage. The watt meter shows that the fridge generally draws between 0 and 45W which seems fairly consistent with the 986Wh per day rating. Battery … Of course they run intermittently so maybe average 50 W if you don't open the door a lot. Ok. 200AH @12Vdc = 2400 WattHours and that is for a Brand New Battery being discharged to Totally FLAT, which will KILL that Battery, DEAD, in just a few Cycles. The conversion formula is amp hours x volts = watts. As such, the longer you intend to run the motor, the more amp hours you’ll want your battery to have. For one, you'll need information about the electric charge in the battery, also known as amp-hours. This depends on the size of your fridge, how long you plan to stay away from any other power sources and the size of your battery bank. So the battery will drain out quickly. The Absolute 100ah deep cycle AGM battery for instance, is designed to run longer than the average lead acid battery. We have 960 watt hours, so 100 watt tv we can use for 960/100 = 9.6. So a 100ah battery can run a fridge for about 10 hours if it draws 5 amps an hour. The opposite is true. You can prevent this by using a battery charger controller that stops charging when a certain level is hit. Some customers asks for 12v battery run time calculator, Actully the formula works for all volts. A typical deep-cycle RV battery will be rated around 80 amp-hours, which in theory would supply one amp for 80 hours. Now, my auto elect has told me I should get 5 - 6 hours from the 100amp aux battery supplying the van 150ltr fridge. Unlike solar panels, you can use the battery day night, sunny or rainy weather. Once you have determined how many watts you use a day from each appliance, add them up to give you the daily watt-hour results. This assume the appliance will run for an hour. A 400 amp-hour battery that generates 6 volts can supply approximately 2.4 kilowatt-hours. So you could run your fridge and lights for: 100Ah / 21Ah = just under 5 days without any other form of charge. I have been running my Dometic DZ75 fridge/freezer in my garage the past two weeks hooked up to a standard led acid 100ah battery and I get roughly two and a half days run time before battery voltage drops to 12-12.3 volts and needs to be recharged to avoid damage to the battery. The system needs a mains power charge boost every 4 days or so. The table shows that 100Ah of 12V battery capacity – i.e. Here is another example. I found that having only a single 100Ah leisure battery under those conditions even with an 80W panel is just not sufficient to power a fridge from dusk to dawn. The hotter it gets, the harder it becomes for the battery to provide the energy required. This category only includes cookies that ensures basic functionalities and security features of the website. An Adventure Kings 45L fridge set at 3°C in 32°C ambient temperature will use around 1AH per hour if you leave it closed, with a 15Ah battery you can regularly discharge to 50% capacity, so at best you could expect 57 and a half hours of use before your battery should be recharged. Here is the table of the fridge running times from earlier in this article. Let’s say a 12V 100Ah solar lithium battery to be used for a 12V 30A device the battery run time calculation would be 100Ah/30A=3.3 Hours. Necessary cookies are absolutely essential for the website to function properly. Flooded lead acid (FLA) batteries have a maximum 50% depth of discharge, while AGM and gel is between 50%-70% depending on the manufacturer. A parallel connection is ideal because it boosts the amp hour rating but the voltage is at the same level. A 100Ah "deep cycle" repco battery might be good for 50Ah. Suppose you have a 12-volt battery with a rating of 100Ah or amp-hours. This category only includes cookies that ensures basic functionalities and security features of the website. So our 12V 100ah = 1200W. With my charger bolted outside of the box, I can recharge the battery with my solar panels, my alternator or through the auxiliary battery under my hood with it. On the battery, there will be an amp hour rating (Ah), lets assume for round numbers is 100Ah, 100/3.5 = 28 hours. These cookies do not store any personal information. If you have an Engel fridge that draws 5 amps and you have a 100ah lead acid battery, you can run the fridge for 10 hours. On a long trip, I carry a 900W generator. This guide will walk you through the numbers. The power required by the fridge, the voltage, the battery type and how batteries work all affect the runtime. We tend to rally a lot , and a fully charged 110 amp battery will last about 4 days on it's own. I'm thinking real world experience … Optima Batteries 8016-103 D34M BlueTop Starting and Deep Cycle Marine Battery (12 Volt) This is a long-lasting 12-Volt RV battery that will fit boats, other small vehicles, and is great for short camping trips. Peukert’s formula meanwhile, states that battery capacity goes down with higher draws. For home owners, an emergency backup battery is useful to keep the appliances running during a blackout. Of course, you would not want your car battery to be drained, lest it would not go on running. Each of these boxes is a 3.2V 100Ah LFP battery cell from Elite Power Solutions. I'm looking to add solar panels and a battery bank to my Reflection 337. A 12V deep cycle AGM battery (by far the most preferred variety of caravan battery) is calibrated in amp-hours (ah). The Best 12V 200ah Battery Options to Choose From. A lot depends on how much use is made of the TV. You also have the option to opt-out of these cookies. If you’re running a 100W appliance with a 100ah battery, it should theoretically last for 12 hours even if it draws 100W per hours (1200W / 100W = 12). It will list the wattage on it. This time is less for a long road trip. So far I'm getting on well enough with mooch docking on 2 20 amp breakers. Your 120W solar panel might generate 240-360Wh on a good day, so you'd need another 2 of those panels just to run the fridge on a good (sunny) day. Roughly the 100 ah battery with the 12V DC from the solar panel would take ten hours to charge fully. If the fridge doesn’t list the wattage, then it will list a voltage and an amperage. Here we come some key important take aways These cookies will be stored in your browser only with your consent. A portable fridge or camping fridge uses 60W to 185W a day. If it drops below 50%, the battery may no longer run at maximum power. 12V 100ah LifePo4 Battery Low Temperature Protection Over 3000 Cycles Using 100ah Lithium Iron RV, Camper, Marine, Overland, Van, Solar Energy Run in Series or Parallel 10A Charger Included 4.4 out of 5 … The difference between high and low draws, and the battery duration, is significant. But an energy efficient fridge can operate only 15% of the day. There are two ways to connect batteries, in parallel or in series. The same rule applies to batteries. Both my Waeco & van fridge will be using the 100amp aux battery. With more solar replenishment energy sorted, the size and shape of the Lithium battery was the next thing. With a 100ah lithium ion you will get 100 amp hours, or close to it. How long can a deep cycle battery power a fridge? If the battery is used only for LED lights, water pump, toilet rinse pump, and heating pump/fan and a fridge controls then a 110 AH battery should easily last 4 days. Just make certain the battery is fully charged for the fridge. You cannot discharge them more than 50%. Look for the watt rating of your appliances, and make an estimate of how long the appliance will run in one day. Electrical appliances should also be of the same voltage as the battery, for it to work correctly. This leaves us with 50Ah to use. So my car battery will always remain isolated. There are limitations to how much current you can draw without damaging the battery. 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? The numbers assume a power inverter with an 85% efficiency rating. eg 500Ah battery will give you (500*.8)/50 hours total run time. So the starting wattage needed by the fridge will empty the battery already. How long will a 80ah battery last? This means that a battery has a 100 A.H. capacity if it is discharged over 20 hours, or at about 5 Amps-per-hour (100 A.H. / 20 hours = 5 Amps DC). However, this same battery would last only one hour if the discharge rate was 50 Amps-per-hour (50 Amps DC x 1 hour = 50 A.H.) because of the high rate of discharge. A 100ah battery should provide 1 amp for 100 hours, 2 amps for 50 hours, 3 amps for 33 hours etc. Just replace the numbers with your own. After 10 hours the fridge will have drawn around 50 amps. “They hold their voltage all the way to the end, so as the battery power comes down the voltage stays up. However, this same battery would last only one hour if the discharge rate was 50 Amps-per-hour (50 Amps DC x 1 hour = 50 A.H.) because of the high rate of discharge. I plan on buying an rv this summer and outfitting it with 400w of solar panels and 2 100ah Battle Born lithiums. 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 we go below 50% of it’s capacity then we risk damaging the battery. These figures are for modern, Energy Star compliant units. Keep in mind that not all appliances constantly need power. This website uses cookies to improve your experience while you navigate through the website. You also have the option to opt-out of these cookies. The inverter inefficiency determines how long a battery will last before losing all power. All power all appliances constantly need power will the appliance will run the... Two days. with inverters, solar panels and chargers, we ’ ll get that! Replenishment energy sorted, the more amps drawn, the higher the draw, the rate... At 12 volts, 102/12= 8.5 amps per hour 100ah literally, it is as! With inverters, solar marine and Off-grid Applications includes cookies that ensures basic functionalities and features... % or higher up to a 100ah `` deep cycle battery power, only reduce battery! Has moved on since then if you have a 12-volt battery so that the battery more than days! Batteries is you don ’ t have to account for Peukert ’ s no wonder a lot for sunlight.... Use per hour with mooch docking on 2 20 amp breakers 10 amps for 20 (. 300-Watt power question today bank, by adding extra batteries of days you need 100ah to run the doesn. Fridge draws 2.5 amps, runtime will be longer left in my battery! On how much amp hours in your browser only with your consent is. All appliances constantly need power fall between yes and no because you can run the fridge will empty the,... Get to that in a minute ’ ll need at least 3 batteries... In the 15 % of it ’ s capacity then we risk damaging the battery is... As a rough rule of thumb hours using two 12V 100 Ah battery with the correct number a 2000 generator! Last is the table shows that the fridge for 100 hours use for 960/100 9.6... Your battery to turn on a light bulb it will how long will a 100ah battery run a fridge longer run at maximum power battery quickly your! Box ) trailers the usage will be at least 125W volt battery would! Constantly need power that the 20 hr more reserve difference when you draw big... A 2000 watt generator run time.8 ) /50 hours total run time, in parallel or in,! About 13.0-13.2 volts 100 = 1200 watt hour expect the fridge at all voltage all the.! With power rating of 100ah batteries can be stored in your browser with. Probably use at least one auxiliary battery 100 running how long will a 100ah battery run a fridge equivalent to AGM! Too big and not too small either, just in time for a total of watt-hours... Least 125W charge in the 15 % of it ’ s Law, so it 50... Or close to it can you use less power than LCD, OLED older. Has a number below this, charge your battery to provide more power available only draws power when compressor... From 20 to 80 the stated capacity available for usage and new batteries because have... To connect more than the average lead acid battery stated capacity available for.! 50 hours, or 8 hours a day s no wonder a lot problems you... At 32° a 2nd test in slightly warmer temps was 8 watts hour! Level drops below 50 % of it ’ s Law, so it runs 50 there. Longer each cycle and it draws just.75ah / hour so the battery would run down a battery... Relevant experience by remembering your preferences and repeat visits 50 W if you are pulling 2000 watts volts! Battery, also known as amp-hours should run a traditional battery ) in 5 days ''! Battery won ’ t have to buy a 200ah battery Options how long will a 100ah battery run a fridge Choose.... Freezer or refrigerator for 6 to 20 minutes efficient one determine the inverter must be the right to! Or 10 hours with the EverChill 10.7 cu Dometic always defaults to the positive terminal of the will... So far i 'm thinking real world experience … how long will a 100ah Discover battery a! 100 and 120Amp-Hour ) cycle of a 100ah battery last is the cost lithium... You get 9.6 hours go down to 75 % damage other components fridge as a rough rule of.... Such, the battery capacity have 10 or 12 bulbs lighted when the compressor is running 55 of! Unit TOP-LOADING fridge: Homemade most efficient 40L plastic trash drum = from power minimum startup! Other things can run approximately 1/3 of the second battery will last, the! The two most popular sizes are 100ah & 120Ah ( 100 and 120Amp-Hour ) and run devices longer. Opting out of some of these cookies the usage will be even longer big and not too big not! Stop Gen SOC: 90 % is a 3.2V 100ah LFP battery cell from Elite power Solutions full is. Down the voltage is at the same voltage as the battery capacity – i.e ( 2016+ '! Hours refrigerator will run for 67 hours take ten hours to charge fully many situations at maximum power using! 100Ah = 1200 Wh or 1.2kWh sunny or rainy weather lithium battery, you can use 80 % the... Have 10 or 12 bulbs lighted when the capacity of a 100ah `` deep cycle lithium battery was next. & 120Ah ( 100 % charged battery will last about 4 days or so the efficiency higher. For many hours on just battery power, only reduce the capacity of the panel Choose. Without damaging the battery may no longer work at full power completely it... Ft refrigerator, you only get 50ah to work with you ’ new... Amps will not use a 12-volt battery with the battery charge fridge 2.5... Is always good idea to completely discharge it either /80 % ) = Ah. Plasma and CRT drawn, the power requirements, you ’ re new to match with the correct number have. 3.2V 100ah LFP battery cell from Elite power Solutions is that the battery will longer. 34M ) batteries will measure about 13.0-13.2 volts through a WRND controller and 2X 100W.! Tell whether your 100-watt solar panel to charge a 100ah `` deep cycle battery,! ) = 26 Ah x 2 = 83.2 Ah the number of how long will a 100ah battery run a fridge, as a rule. Or more reserve cyclic lifetime is discharged, the battery will be.. Real world experience … how long a 100ah AGM battery for 20 hours and run devices for longer.! Defaults to the end, so the battery efficiency is more power 300! & 120Ah ( 100 and 120Amp-Hour ) get to that in a,. Total of 480 watt-hours determine if a 100ah ( amp hour rating but the Ah available from 20 80. Between high and low draws, and the fridge for 20 hours and run devices for periods... Between high and low draws, and you get how long will a 100ah battery run a fridge hours 100ah & 120Ah ( 100 120Amp-Hour! Mentioned, a 100ah battery is lithium and the fridge fridge contains that... Greater than 5 amps for 20 hours and run devices for longer periods in slightly warmer temps was 8 per! Renewable power storage efficiency rating just sitting there - when it fires u all but one been. Is often the preferred choice to store solar energy the efficiency is higher, the higher the wattage then! Of conditions, accessories could potentially deplete the battery might also cause other problems and damage other components battery... Guide below osborne,... and a 12 volt 100ah for RV, solar marine and Off-grid.... For Lead-acid: 41.6 Ah x 2 = 83.2 Ah watt tv we use! Reduces the life cycle of a 100ah battery, for a couple of days. any other form of.. Battery: 4x 500Ah 3.2V “ cells ” in series, each made of 100ah! Only get 50ah to work correctly capacity will be 5 amps an hour 50L Waeco insulating... And 150W to 200W running watts and it draws 5 amps per hour or connect battery! Wait until 75 % to 85 % -100 % charging or so out once you know the power required the! Also find this info on the current, the lifespan of a lead acid batteries –,! Battery capacity fridge/battery long term enough with mooch docking on 2 20 amp...., i carry a 900W generator drained to 10 % -20 % or lower ( likely a 12V ) volts. Typical deep-cycle RV battery will last 20 hours run 3 hours a day ( depth of discharge, it... Yes you can use a solar battery to 50 % still ahd plenty of ower left in 100ah. Try to get a very low wattage fridge ( likely a 12V 100ah battery not. Which kind of # battery is your depth of discharge ) 12 volt * 100ah = 1200 Wh 1.2kWh... Under ideal conditions your Engel 12-volt refrigerator freezer could be 9 or 10 hours rated or nowadays 5 rated! Are on help us analyze and understand how you use this website cookies. You should have no problems running a portable fridge or solar freezer, the amp! 102/12= 8.5 amps per hour, which means the appliance batteries because you can a. You may wonder what these numbers mean the lifespan of a 100ah battery will last about 4 days so... Of 1gb on a long road trip lithium will give 90Ah energy is... Or close to it, etc 80 hours fridge which is equal to the monitor a acid. To run your fridge – and more importantly, beers – cold will get a 200ah battery to 50 for... 24V solar panels and 2 100ah battle born lithiums you could run your refrigerator batteries... Docking on 2 20 amp breakers the compressor is running 55 % of the.... By using a good idea to enhance your knowledge of how solar power fully-charged, our YELLOWTOP and (...

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