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https://batterystory.com/how-many-watt-hours-in-a-car-battery/#:~:text=A%20typical%20vehicle%20battery%20has%20a%20current%20rating,that%20this%20formula%20applies%20to%20any%20automobile%20battery.
https://batterystory.com/how-many-watt-hours-in-a-car-battery/
A typical vehicle battery has a current rating of 45 amps per hour. When calculated over 20 hours, it indicates it can produce 2.25 amps at an average voltage of 12V. As a result, the wattage will be 540W. It is critical to realize from the calculations above that this formula applies to any automobile battery.
https://www.tiannengbatterygroup.com/info/car-battery-watt-hours-introduction-and-measur-60368263.html
And yes, Watt-hour is the perfect battery rating system. 12 Volt Car battery Watt-hours. Watt is simply the measure of power in a battery; V x A = W where A is the current and V is the electric pressure. This simple formula is easy and simple to understand.
https://www.lisenbyretirement.com/interesting/faq-how-many-watts-can-a-car-battery-produce.html
How many watts does a battery have? A 12 volt 1ah (amp hour) battery is rated to put out 12 watts for 1 hour before it is fully discharged. Or it could do 24 watts for a half hour. A 12 volt 2ah battery can put out 24 watts for 1 hour or 48 watts for half an hour. A 12 volt 4ah battery could put out 48 watts for an hour.
https://homebatterybank.com/car-battery-powering-light-bulb-how-long/
How Long Can a Car Battery Power a 12-volt LED light? A 58.8 AH car battery with a direct DC connection to the light bulb (no inverter) and only discharging down to 50% should be able to power a single 12-volt, 3-watt LED light bulb for 117.6 hours and still be able to start the car.
https://www.batterystuff.com/kb/tools/calculator-sizing-a-battery-to-a-load.html
456 Watts will pull ~41 amps from a 12v battery source per hour. For ten hours, that‘s a total of 410 amps pulled. For a battery recommendation I would at least double this number…so any AGM battery bank rated with 820 Amp Hours or more is my recommendation. More is needed for flooded batteries.
https://www.deepcyclemarinebattery.com/articles/how-long-will-a-12v-deep-cycle-battery-last-with-an-inverter.html
https://www.quora.com/What-is-the-average-wattage-on-a-car-battery
A typical car battery has 60 AH capacity and 12 V so its power capacity is 720 Watt - hours. A small fridge might pull 100 W when running. Of course they run intermittently so maybe average 50 W if you don’t open the door a lot.
https://homebatterybank.com/how-many-times-can-a-car-battery-charge-a-phone/
Since our car battery has 50AH and it is a 12-volt battery, we take the equation (amps * volts = watts) and 50ah * 12v = 600 watt hours (wh). For the purposes of this article, we are going to assume that your car battery is 600wh, relatively new, healthy, and that you are attempting to charge your phone with the car battery by itself (not connected to the car).
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