You will definitely have parasitic drains on your chassis battery caused by the radio, alarms, and the onboard engine computer among others. So, you will need some method of maintaining it’s charge while in storage. The Trik-L-Start is one way but I don’t trust it. It only charges the chassis battery when the house battery is above a certain voltage. So, if your chassis battery is discharging at a faster rate than the house battery, the chassis battery will never get charged enough.
However, to be fair I have never used one so I don’t have any practical experience with it. Maybe I don't understand exactly how it works (there is not much detail on this on their website).
I use a separate battery maintainer on the chassis battery, so it has it’s own monitoring and maintaining system. The downside is that battery maintainers generally cannot be left connected so you have to remember to hook them up when the RV is not being used, and to disconnect them when it is being used.
The Trik-L-Start is hardwired so you don’t have to do anything after that.
