Are you sure you Don't you mean Amp Hrs ?
1 amp at 12v would be 12 amp hrs
TV using 8 amps for two hrs would be 16 amp hrs which at 12v is 192 watt hours
100 watt hrs is next to nothing and the batteries should be reading at least 12.6
100 amp hrs is over 1000 watt hrs would leave you with a battery needing recharge
If you installed an amp meter, that reading is 100 Amp Hours
I can explain it to you.
But I Can Not understand it for you !
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