Add-A-Battery Kit - 120A - Blue Sea Systems Use the Blue Sea Systems Circuit Wizard to select the correct wire size, 7650. The ADD-A-BATTERY is as simple to operate as an ON-OFF switch, Battery Management Wiring Schematics for Typical Applications. Articles. Installation Instructions Features and - Blue Sea Systems PDF file• The wiring diagram illustrated on the back page represents a common installation and is not meant to Blue Sea Systems stands behind its products for as long as you own them. Add-A-Battery 7650 † Reducing cable size will reduce current ratings * Per Circuit. Blue Sea Systems - Innovative Electrical Systems — Built Blue Sea Systems designs and manufactures AC and DC electrical products engineered to withstand the demanding applications in Marine and Specialized Vehicle electrical systems. Products are shipped from the company’s Bellingham, Washington manufacturing facility to distributors and original equipment manufacturers worldwide.