solar disconnect breaker

[yycwrangler]

Hi folks

Looking to install solar on my cargo trailer. I have 4....100watt panels. I have attached the info from the bottom of the panels for reference. I want to put a breaker between the PV's and MPPT. My limited knowledge prevents me making a decision of what size of breaker and I'm hoping someone may be able to help me..Running the 4 panels in series. Thanks in advance

4 Pcs 100 Watt 12 Volt
Monocrystalline Solar Panel
Maximum Power: 100W (each solar panel)
Maximum System Voltage: 600V DC (UL)
Open-Circuit Voltage (Voc): 22.3V
Short-Circuit Current (Isc): 5.86A
Optimum Operating Voltage (Vmp):
18.6V
Optimum Operating Current (Imp):
5.38A