Solar DC Breaker or DC Fuse?

[Archos]

Which one would you recommend for my serial PV1+ and PV2+ cable, dc breaker or dc fuse?
What are the pros and cons of each other? Thanks for comments.

PS: Please ignore the volts and amps on picture, they are simply for type reference.

 

[jjww]

many systems need no fuse/breaker,
( Does Isc exceed max allowable wire amperage?)
but at least breaker is also a disconnect.
Fuse cheaper?

 

[Brucey]

Opening the touch safe fuse holders under load could cause an arc and fire.

If the DC breaker is garbage the same could happen.

Use an IMO disconnect thats designed to operate thousands of times under load, and handles positive and negative, assuming you have a single string or dual strings. Once you start paralleling three or more strings you need to have some kind of ocp.

 

[OnAJourney]

I'm new to this so happy to have someone point out any concerns, but I was just considering the same for my system - not just PV but all over.

I went with Blue Sea Breakers (there 3 different lines of breakers they had but I used these ones but I found cheaper ones scattered all over eBay) in most places because the fuse holders are $10-$25 each and fuses are $15-$30 each and when you need both it turned into $30-$50 for one fuse point and I could get breakers for similar or sometimes cheaper prices for an open box item and it has the added option to be opened manually so I don't need switches everywhere. And obviously you don't have to buy a new fuse if it trips.
It ended up being cheaper and more useful which is a win win.

I would steer away from off brand breakers - I've heard they don't reliably trip which is a big problem and why I stayed with blue sea since they have a good reputation.