Calculator rv12/8/2023 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). Find out more about RV batteries, including helpful buying tips.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. When researching and budgeting for a solar power system, be sure to consider the recommended number of batteries needed for your particular setup so that you can get the most out of your new system without spending too much money on unnecessary components.Īs an example, two of the GP-LIFEPO4-100 Lithium batteries will provide you with 200 ampere-hours, enough to stay off-grid for 2-3 days in a midsize trailer. Lithium-ion batteries are typically more efficient than lead acid ones and have a longer lifespan-making them ideal for solar power systems that require an extended storage period. A high-quality, long-lasting battery will save money in the long run as there will be less need for premature replacements due to a low capacity or degraded performance over time. Additionally, it is important to factor in battery efficiency and lifespan when deciding which type of battery should be used for the system. Depending on the size of the system, anywhere from one to multiple batteries may be required in order to store enough energy while the sun is up. When it comes to powering an RV or mobile home with solar energy, batteries are an essential part of the system.
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