this is why

StirCrazy wrote:
I'll rephrase that and add in "most of canada". growing up in alberta it wasnt uncommon to go out on the snowmobilds at -40 and -35 cold snaps in alberta sask and manatoba are just the normal. heck it was tickling -35 at work in BC this last week. I understand his delema as he uses his rv for a travling hotel for his work, but his insistance that LI won't work is the issue.

they won't work because he doesnt want them to, is more the answer. with the small size capability he could easily build his own for far cheeper than the SIO2 end up with 3 times the capacity in the summer and about 6 times the capacity at -40.

because of the smaller form factor he could put ridgid foam lining the whole battery tray and put a few 12V heating pads on them. so before he leaves home the batteries would be warm and then driving the coach stays warm, not going to tell me he doesnt use a block heater at thoes temps or the old coach would never start.

if this coach is so highly modified, why is he afraid to do another for the purpose of giving him the most available power possible... we'll never know

I agree with the 2nd part...he simply doesn't want them to work...for whatever reason, we probably will never know.

But the vast majority of Canada's population lives in areas no colder than Michigan and the Canadians we know largely put them away come winter. Not saying it can't be done but it's really unusual to be out boondocking in those temps...even if snowmobiling, most people are typically connecting to grid power, so a big battery bank is not critical.