Can I store things under my grill? Only one propane tank should be stored underneath the grill at a time. Check out our blog, "Storing Items Under Your Grill" for more information on this topic. Related articles Why isn't my tank scale working? Can I convert my grill from liquid propane (LP) to natural gas (NG), or vice versa? Can I get fold down side tables for my grill? Which is better Porcelain Enamel or Stainless Steel? Are there stainless steel grates for the Genesis II series?