The Boat Builders Labor Saving Device – Custom Designs Available. Battery management system manufacturer Wells Marine Technology has launched a space-saving flat panel model of its Total Automatic Battery Management System (T.A.B.S.) that can be configured easily for any single, twin or triple engine application and can also be custom-designed to builder model specifications. Wells T.A.B.S. connects battery chargers, DC electric panels and equipment to save boat builders time, money and storage space while eliminating confusing battery selector switches for boat owners.