Welcome to the forum
MY Siesta has a converter that charges the battery.
I Don't know particulars of your inverter. An inverter changes 12 volts from battery to 115 volts ac to run appliances. Some inverters require a separate battery charger.
However here is an article on balanced charging of a 4 battery parallel bank.
https://www.impactbattery.com/blog/t...s-in-parallel/