You have contactors on the DC side to disconnect the battery when the voltage gets too low or too high, that's not overkill. That's best practice to prevent killing your batteries.
Are you getting the discharge rate of 280A because the battery is 280Ah? If so, that is incorrect. Ah is a measurement of current over time not discharge rates. For example here are the specs for the modules on my pack.
Capacity (ideal) 5.2 kWh (233 Ah)
Discharge Current (max, 3s) 1,520 A (~6.5C)
Discharge Current (10s) 1,000 A (~4.3C)
Discharge Current (continuous) 233 A (~1C)
Discharge Power (max, 3s) 30 kW
Discharge Power (continous) 5 kW
Charge Power (max, 10m) 8 kW
Charge Power (continous) 5 kW
As you can see the capacity of each battery module in the pack is different than the discharge current. Also I have my modules wired in 2S7P, that means I'm spreading the load across 14 modules. So if I were to take the max output of my inverter 250A (12kW) I would need to divide it by 14 since the load will be divided across all my modules in the pack. That would mean at the worse case scenario when inverting 12kW each module would have a load of 17.85A@48v which is way lower than 233A.
Are you getting the discharge rate of 280A because the battery is 280Ah? If so, that is incorrect. Ah is a measurement of current over time not discharge rates. For example here are the specs for the modules on my pack.
Capacity (ideal) 5.2 kWh (233 Ah)
Discharge Current (max, 3s) 1,520 A (~6.5C)
Discharge Current (10s) 1,000 A (~4.3C)
Discharge Current (continuous) 233 A (~1C)
Discharge Power (max, 3s) 30 kW
Discharge Power (continous) 5 kW
Charge Power (max, 10m) 8 kW
Charge Power (continous) 5 kW
As you can see the capacity of each battery module in the pack is different than the discharge current. Also I have my modules wired in 2S7P, that means I'm spreading the load across 14 modules. So if I were to take the max output of my inverter 250A (12kW) I would need to divide it by 14 since the load will be divided across all my modules in the pack. That would mean at the worse case scenario when inverting 12kW each module would have a load of 17.85A@48v which is way lower than 233A.