lithium battery

After several years of research this is going to be a long, fairly detailed, lead in to the whys and wherefores of my inverter installation. This not meant to be a tutorial but just some highlights and simple explanations. This is most definitely an experiment only time will tell how well it all...

Can anyone advise how to separate house loads from Port starting battery on Sea Ray Sundancer 42? I want to install Lithium for house and solar but these are not ideally suited for starting diesels .