You should also check that your boat has the right adapters for connecting to the generator or electrical supply. You can connect in and start the charging process after everything is set up. Keep in mind that it’s preferable to charge your batteries before they go entirely flat. If you own a trolling motor, you are aware of how crucial it is to maintain fully charged batteries. Following are some pointers for charging trolling motor batteries while lakeside: Make sure you have the right kind of battery charger first. Second, power the charger with a generator or an inverter, Third, batteries can be charged using solar panels, Fourth, keep the batteries charged when not in use by using a battery maintainer. I found this method from https://authorityarrow.com/ if anyone knew another method tell me.