Looks like a diagram of a North Korean Scud ER missile.
The more solenoids, the more wires and connections involved the chance of trouble goes up by the square of the components. This is basic electrical engineering. The Blue Seas and Sure Power splitters operate on the same exact principle - allowing the starting battery to charge first. BI DIRECTIONAL means the allowing of house battery charging to automatically trigger the charge manager thus charge the chassis battery. It works in both directions. Except for a .250" faston terminal wire to chassis negative the entire setups are potted. Solid. But for safety's sake I recommend the 200-ampere model. Bi-Directional.
