Review/critique of planned battery/inverter system?

Rbertalotto wrote:
Balance batteries.....I thought you would connect positive to positive and negative to negative and then take positive from top battery and negative from bottom battery

That is the common way of doing it. But, there is another way of tackling it- positive to a bussbar and negative to a bussbar and then the load goes to the bussbars (so it's split across all of the batteries equally).

If you read the link that pianotuna post, it explains it much better than I can.