Propane boils at -43°F and becomes a liquid at -44°F. It will freeze at -306.4°F. If it is that cold fuel for your generator is the least of your problems.

__________________
Dave
88 300E 250K Sold
2000 C230K Totaled @104K
2003 ML320 156K Sold
2009 E350 4Matic Sport 46K Sold
2011 ML350 60K Sold
2014 GLK350 46k
2012 GL450 55K