Originally Posted by Cat320
You must be using the new math they teach these days
... 8 x $80 is $640 plus tax is north of $700. $700 will buy you a lot of propane.
You're right of course. That said, to me the cost of the extra batteries is still very minor - if you didn't have the all electric, you'd probably have 4 batteries, so the difference between all electric and electric / propane is 4 batteries more so probably about $350 every 5 to 7 years which I'm pretty sure is less than we pay for propane (I don't keep track of it closely but I think we usually refill the propane about twice per year and I'm guessing it's often about $50-80. It's also more convenient to change the batteries once per 5 years than to refill propane a few times per year). In any case, it would certainly be a lot less than we pay for other things (gas, camping fee, maintenance, etc).