"Holds up to eight OutBack Power Systems DIN mounted breakers for PV array configurations of 12 to 72 VDC systems with a maximum open circuit voltage of 150 VDC or use six OutBack Power Systems OBFH "touch safe" type fuse holders for high voltage systems with a maximum open circuit voltage of 600 VDC."
You can use any DIN rail mount 10A 150VDC breaker. Here is one;
Comments
The user manual of Outback Flexware FWPV says:
You can use any DIN rail mount 10A 150VDC breaker. Here is one;
https://www.greentechrenewables.com/product/midnite-solar-mnepv10?qty=1