Well, if you have lower numbers of Storage devices like mfsu and batboxes you can make location cards that are much more easier to use and they display: max storage, free space (eu), fill % and fill in EU. Also, if you have multiple storage devices in one card (craft one by combining 2 location cards, up to 6) it will show the Total of them with the same info as above. search Industrial Information Pannel on the tekkit wiki.