Your rated power outputs from WHAT?How to determine the battery capacity for 10 hours..I mean discharging time of battery.
This calculation required for solar inverter design
My rated power outputs are 750w with 3.2A..which works on A.C 230V supply
Uhm... generall the current supplied by the battery to start a car is a LOT more than 10A -- typically several hundred amps and potentially well over a thousand amps for larger motors. Diesel motors without automatic compression release also tend to draw more because of the high compression.The heat is from the internal resistance of the battery and the current (P=IR). As the battery heats up, the chemical reaction to produce the power becomes easier, so the voltage increases. How much heat the battery can withstand and the lifetime depends on the composition of the battery.
A car battery can supply 10A (or more) of current when you start your engine. But you wouldn't have this current for more than 15 seconds, so the battery barely heats.
Do you have personal experience with this? I've heard it before but I think it was offered as a myth. It sounds plausible but I've never tried it.By warming up the battery with the modest draw from the headlights, you are often able to get enough power out of it to the starter to light off the engine.
I've never heard it offered as a myth or an actual suggestion, but I'm from Texas . When I read this, I started thinking other ways to warm the battery that didn't involve draining it, and I came up with enough material to fill several episodes of the SpikeTV show "1000 Ways to Die."Do you have personal experience with this? I've heard it before but I think it was offered as a myth. It sounds plausible but I've never tried it.
When I was young, my parents always had a block heater in the car which would be plugged in during the coldest nights. There are also heaters available for the battery.I've had the pleasure of seeing "-30°F" on the car thermometer up here where I live (northern IL). Thankfully I have a garage or I'd have never made it out driving.
But anyway, in my experience, if the engine doesn't fire in the first few seconds when bitterly cold, you're done. Give up and go get warm. If you really need to get going, take the battery into the house for a while. I've screwed around with hair dryers and 100W bulbs under the hood, but with no luck I can recall. Do you have any idea how hard it is to remove a battery at -20°F?
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