I have a 75AmpHour AGM battery. I want to use a 15Amp quickcharger to charge it. The quickcharger's comments state that the output on the DC side is 280 watts. But my calculation shows 180watts(15A x 12V). How did they come up with that wattage? Is my calculation wrong?
I'm also trying to figure out how many amps draw that will be on the AC side. If it is indeed 280 watts on the DC side, wouldn't it be 280watts/12V = 23 Amps of DC current.
But then the conversion from 12V to 120V is a factor of 10 so 23Amps/10 = 2.3Amps.
Does that seem right?
Hmm... the product does have a comment about 3Amp draw. So... hmm... 2.3A x 120V = 276 watts.
Which must be where they are getting their 280 watts.
How do I calculate how long it takes to charge a 75AH battery with the quickcharger set on 15Amps?
Is that 15 amps an hour? 75AmpHrs/15Amps = 5 Hrs? Taking 75 divided by 15 and crossing out the Amps leaving me with hours.
Something like that, right?
I'm also trying to figure out how many amps draw that will be on the AC side. If it is indeed 280 watts on the DC side, wouldn't it be 280watts/12V = 23 Amps of DC current.
But then the conversion from 12V to 120V is a factor of 10 so 23Amps/10 = 2.3Amps.
Does that seem right?
Hmm... the product does have a comment about 3Amp draw. So... hmm... 2.3A x 120V = 276 watts.
Which must be where they are getting their 280 watts.
How do I calculate how long it takes to charge a 75AH battery with the quickcharger set on 15Amps?
Is that 15 amps an hour? 75AmpHrs/15Amps = 5 Hrs? Taking 75 divided by 15 and crossing out the Amps leaving me with hours.
Something like that, right?