Have a couple of 5 gal racing-type jugs (no vent problems). Don't see real reason to go to larger storage since can buy diesel 1/2 mi away. But would like to make it easier when refilling. So far have found a FloNGo siphon https://www.amazon.com/gp/product/B003TG9J36/ref=ask_ql_qh_dp_hza but reviews just don't grab me. Have seen some manual winder pumps, but they don't look suited to jugs. If there's a 12v option, wouldn't have to lift jugs - even if can do with FEL. Not excited about battery models.