I'm an Electrical Engineering student still new to power systems. I'm working on a project that uses a 24V and 200Ah battery bank made up of 4 AGM lead acid batteries. The batteries are supplying four brushed DC motors, the motor drivers, various sensors, and two Arduino Megas. Maximum continuous current draw from the system will be about 80A total. I need a safe way to create a battery disconnect for the system that is controlled by a large push button that is remote from the battery bank.
I've been looking at contacts and relays as well as a key actuator disconnect switch like one on McMaster-Carr (item # 7110K42). It is rated for 100A at 12VDC. I should mention that the product is on a tight budget which is why this is an option as opposed to a contactor.
I am wondering if it is possible to use two of the key actuator switches, since the battery bank is composed of four 100Ah 12V batteries, and an actuator switch could be placed somewhere in the battery bank that could disconnect power to the whole system safely.
I am worried about the specific placement and also potential arcing during switching. I'm getting buried in research and am just hoping for a little input or guidance on which direction to continue research and tips on how to proceed.