The last time I was paying attention, about 8 hours to go from ~1800 to just over 3k, I think. Just over, as in, when it's been sitting for a little while it is right at 3k.
I don't typically pay too much attention to fill times, as long as it can fill a tank within the week it's good enough for me. As long as you fill it ahead of time you will be fine. Don't wait til the night of. I typically fill mine up when I get home.
Last edited by desertT1; 10-23-2012 at 02:39 PM.