![]() Opening and Closing the Door: Every time you open the fridge door, some cold air escapes, and the fridge has to use more energy to cool down again.This means it might use more energy, reducing the runtime. Outside Temperature: The hotter it is outside, the harder your fridge has to work to keep things cold.Several other factors can influence the actual runtime, including: RV Fridge Runtime CalculatorĪdditional Factors That Affect How Long Your Fridge Will RunĬalculating how long your fridge will run on battery power isn’t just about the battery and the fridge’s energy consumption. Hate math? Simply plug in your usable battery AH and fridge amps into the calculator below. In this example, the fridge will run for roughly 10 hours on battery power. Usable Battery AH ÷ Fridge Amps = Time Example Calculation: Calculate How Long Your Fridge Will RunĬalculating how long your fridge will run on battery power is as simple as dividing the usable energy from your battery by your fridge’s energy consumption. You can usually find your battery capacity rating on the battery itself. ![]() An older battery might not provide as much energy as it did when it was new. Important: Just like people, batteries deteriorate as they get older. If you have two 100AH lead-acid batteries, you’ll have a total of 100AH usable capacity (50AH from each). Multiple Battery Systems: If you have more than one battery, you can add their capacities together.They are usually more expensive but provide more usable energy. If it’s rated at 100AH, you can use close to that amount. Lithium Battery: Unlike lead-acid batteries, lithium batteries allow you to use almost all of their capacity.If a lead-acid battery is rated at 100AH, you should only use 50AH before recharging it. But you can only use about half of their capacity. Lead-Acid Battery: These are commonly found in RVs due to their lower price point. ![]() Think of it like a big water tank the more AH, the more energy it can hold. This capacity is measured in ampere-hours (AH). The battery capacity tells you how much energy the battery can store. Once you know the energy consumption of your fridge, we need to figure out how big your power supply is. Alternatively, you can look in the owner’s manual or do a quick search online for your make and model. Tip: Look inside the refrigerator for an information sticker that shows the power draw in watts and amps. Always refer to the manufacturer’s specifications for accurate energy consumption details for your particular fridge. Please note that these ranges are illustrative and may vary based on the specific make and model of the fridge. The type of fridge plays a significant role in how long it can run on battery power. We’ll need to start by gathering the fridge’s energy consumption and the power rating of the battery(s). So, let’s learn how to quickly calculate how long your fridge will run on battery power. Your RV fridge and battery setup will undoubtedly be different. How Long Will Your RV Fridge Run on Battery Power?Ī 12V DC absorption fridge rated at 15A, powered by a 100AH lead-acid battery, will run for approximately 3 hours and 20 minutes before it is depleted below the 50% threshold (assuming it’s the only appliance using power). Several factors influence how long an RV fridge will run on battery power.īelow you’ll learn how to get a quick estimation (good enough for most cases) and how to calculate exactly how long your RV fridge will run on battery step-by-step. As an Amazon Associate I earn from qualifying purchases. Buying through links on our site may earn us an affiliate commission.
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