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
Volts times amps equal watts
Stick to using watts, maybe you will better understand
10 amps times 14 charging volts = 140 watts
If your charger used 10 amps at 120v input power that would be 1200 watts ( actually 1200VA aka volt amps, but we won't get into that right now )
You don't need 1800 watt generator for want you have described so far
Although 1800 will be better if you get a MW or a bigger coffee maker
Stick to using watts, maybe you will better understand
10 amps times 14 charging volts = 140 watts
If your charger used 10 amps at 120v input power that would be 1200 watts ( actually 1200VA aka volt amps, but we won't get into that right now )
You don't need 1800 watt generator for want you have described so far
Although 1800 will be better if you get a MW or a bigger coffee maker
jbfoster wrote:MrWizard wrote:
you have the use time figured correctly
however it 'ALWAYS' takes more energy than what was used to replace the used wattage aka ampHrs and its not linear
it won't be 10amps for 5 hours, it will start out higher amps and decrease/get less the closer the battery gets to being fully charged
the reversing of the chemical reaction that makes electricity uses power while doing the conversion/restoration
thats why you want a 30-45 amp charger
it will start out high and go down,
you will get charged faster
a 10amp charger will take 7 to 12 hrs to get too full charge
replacing 50 ampHrs
it will start at 10 and go down, making for a long charge cycle
I was going to get a 1000 watt generator but I am now getting a 1800 watt generator. It's rated at 15amps so I don't want to use a charger more than 10amps. I don't have an RV. We will be tent camping for a while. We are inbetween RV's right now due to finances being tight. This is all I can afford for now so I will have to deal with what I can do with what I will be getting.
Thank You
Jim
