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Community Alumni's avatar
Community Alumni
May 22, 2019

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 shows 22 watts. I plan on using a 1000w inverter hooked to one 12v battery. I havn't purchased a battery yet so i'm not sure how many AH I will have to work with.

At 12v that would be 1.8 amps.
at 124v that would be .18 amps.

Which amp usage would I use, the 1.8 amps or .18 amps?

Thank You
Jim
  • Community Alumni's avatar
    Community Alumni
    May 22, 2019
    That will be plenty I think. Pretty much all I will be doing is the TV and maybe charging two cell phones. I'm also getting the Westinghouse iGen1200 generator. It's a 1000 watt and 1200 watt peak. I'm guessing the max amp battery charger would be 8 amps this generator could handle. I would probably get a 5 amp battery charger and then run the generator 2 to 3 hours or less a day to top of the battery. Almost forgot the 650 watt coffee maker to make a cup or two a day. That shouldn't be to much at 600 watts for about 3 minutes a cup.

    Jim
  • elivi8's avatar
    elivi8
    Explorer
    May 22, 2019
    A standard 12V battery will have around 90 amps and you can only use about half of that so 45 amps else you will shorten the life of the battery.

    You would be using the 1.8A number at 12V.

    Ryan

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