Rather or not you are plugged in is the primary question.
See their manual. https://cdn2.olivertraveltrailers.com/wp-content/uploads/2024/05/30122505/Lithionics-Batteries-Storage-Procedure.pdf
“1. If your battery has the Lithionics Internal Heater, and you are subject to winter conditions, keep the battery ON,
solar ON and plugged into shore power. Shut down all appliances, lights, and other DC loads. You may purchase a
very small charger from Lithionics Battery (KF Series) and power this from an extension cord if shore power is not
available. This will keep the heater running and protect your battery. Doing this will eliminate the procedures below.”