Lithium batteries are very well suitable to start the engine but I see a lot of systems with lithium is used for everthing except the engines where lead batteries are used. This results in a complex system with different types of chargers, separators ect. What is against a system with only ONE battery ?
Of course the alternators need protection against a to high load and the batteries need protection against a too deep discharge in case the engines do not start after a reasonable time but if these issues are tackled the system becomes quite simple. What am I overlooking ?