Vacuolar invertase. Hydrolysis of terminal non-reducing beta-D-fructofuranoside residues in beta-D-fructofuranosides. After the proteolytic cleavage of the propeptide, the protein should stay anchored to the vacuolar membrane on its vacuolar side. Expressed in buds, stems, roots and leaves. Not regulated by light during bud burst. Belongs to the glycosyl hydrolase 32 family.