Originally Posted by tlaffourtit
there are 10 12v batteries. each have 145 ah. I hope this helps.
Yes, and thank you again -- I had seen that before.
The reason I asked the question in the first place -- for those that aren't experienced in this area -- is that had your batteries been 10 6v batteries each of 145 ah instead, you would had wired them in groups of two in series to get 12 volts, and ended up with 725 Amp-hours at 12 volts (instead of your 1450 amp-hours at 12 volts). It's half the energy capacity and therefore roughly half the weight as well (assuming technology and all other battery factors are similar).
I get why flrockytop is confused in thinking that all amp-hour battery ratings are comparable. They are clearly not because a battery's amp-hour rating is not a good indication of energy storage unless the voltage is also specified. And if voltage is specified, the better units of measure in my opinion are kilowatt-hours. That's the way electric cars are done because it makes more technical sense.
This is going to be more of an issue when we start seeing motorhomes with 12, 24, 36, and even 48 volt systems.