What are the specs for a breaker needed between the solar panels and inverter?

[Buttercup]

Hi,

I have a 24v off-grid system, with three panels in parallel (each panel is 450 watts). I've just replaced two 12v 150AH gel batteries in series, with one 24v LifePO4 100ah battery.

The inverter is a 3KW 24v MPPT 50A/100V VPM hybrid from WCC Solar in Spain: Hybrid inverter 3KW 24v MPPT 50A/100V VPM

Which breaker is needed between the solar panels and inverter?

The breaker that's being used (here's a photo of the specs:
https://www.dropbox.com/t/Fr9mNyTYVutNeOlw ) is heating up...

Each solar panel's VOC is: 41.25V, Short circuit current: 13.62A, max series fuse rating 20A.

Thanks

[sdold]

Hi Buttercup and welcome to the forum, hopefully you can get some assistance. Here's the breaker in case others don't want to deal with Dropbox:

image.png
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[littleharbor2]

That breaker is not rated for DC voltage very likely your problem. You need DC rated breakers to be safe