30lbs thrust trolling motor I dont know what this refers to,but you need to know the facility consumption,or present-day and time its in use to work out A/Hr from the battery. You need to set up with the load of LA technological know-how,when you should have the advantages of Lead https://canadian-solar03704.blogozz.com/30097187/not-known-factual-statements-about-solar-kits