Questions about automatic gas bottle switching system, e.g. Truma DuoControl CS?

Hello together, Would you like to install an automatic gas bottle switchover system for winter camping in our Womo. Now I have two questions: 1. Can you operate an automatic switchover system (e.g. in summer) with just one gas bottle? 2. Which system would you recommend, Truma, Multimatic? Thank you for the information