Watts Help Needed.
I am trying to figure out how long a battery will last. I have Googled it and read a few sites but I still have a few questions. I have a small TV that I plugged into my Kill a Watt meter. That sho...
Forum Discussion
jbfoster wrote:
The bigger one says it does 1800 watts and 15amps. I was looking at the rating of 15amps. Is the 15amp rating for AC current so DC amp rating would be higher?
1800 watts / 120 volts = 15 amps
1800 watts / 12 volts = 150 amps
Although between power factor and efficiency losses I would count on half as the maximum charger rating or 75 amps.
15 to 20 amps charging per battery is plenty. 30 would be a practical maximum.
