To get even longer run times in between charges or for use on our 25 GPM heavy-duty pump models such as the Pro 110 Industrial FTS, we recommend using our larger size 29 battery. The part number for that core is SRM-29.
A full charge should allow you to discharge a 110 gallons tank a half-dozen times or more before these batteries need to be re-charged. If you take advantage of the built-in auto-charging wiring harness on our aluminum trailer models, when connected to the tow vehicle, the harness will allow the alternator on your truck to charge this on-board battery on your trailer. The harness receives its power from the 12-volt pin that is usually designated for powering an electric brake controller.
If you have a different gas trailer model other than one with an auto-charging line, you can also use an AC wall plug-in charger to maintain these DC batteries. Here’s an example charger we offer.