I had to go out of the country on work and was told 3 weeks. I left all my lipos at 1/2 charge. I was gone for almost 3 months. When I got home, they had all puffed - the cell on top in every case.

I'd strongly consider selling them. I don't see them making it for a year in storage without them going bad. Either than or keep them and a charger handy where you can cycle them about once a month or so.

Then replace them when you get situated where you can use them again. They'll be better lipos than what you have now and possibly cheaper as this side of the hobby evolves.