OLD NEW STOCK. The NewMar ES-7A Elite AC Master Panel is designed for expanding the AC circuit capacity of any NewMar Elite Series panel. It can also be used as a standalone load center and boasts a 16 branch circuit capacity. The NewMar ES-7A AC Master Panel comes with a standard 50 amp AC master breaker, with 30 amps available as an option. Please note that the 50 amp master can be used on 230 VAC line-to-line systems, but 30 amp is the maximum master breaker value for 230 VAC line-to-neutral systems.