Fuse polarity

[occuplus]

im new into solar n trying to learn. (sorry im from non-English spoken country)
i ve been using 1kw AIO inverter for a while bcs fan noise n want to hv more load i upgraded to 5 KW AIO inverter This one.

i know fuse currents low n want to use till get proper ones. here s wht i have.

PV have 4 280w in series. my load would be ~120w


This MCB is this one 500V dc @16A



for battery to AIO inverter i have a MCB from local suppier it was intented to use for e-mopeds. (pic s not clear it writes 350-1000W)







i had this one but i learnt tht its not rated for 48v.

So if those polarities are correct?
Thnx for help

 

[JoeHam]

I use the C65H series but oddly enough I posted the data sheet for the C60H series here last night :

Mount DC breaker upside down

For wire routing reasons I would like to mount a DC DIN rail breaker upside down. Other than code compliance and possible operator confusion, is there any other reason not to do this ? Specifically a C65H DC Breaker like this ...

diysolarforum.com

Use a continuity tester to be sure how the + and - flow through the breaker as it appears they criss cross in the breaker. The C65H series passes straight through in all the ones I have (about a dozen).

The line and load can go top or bottom.

At a max current of 63 amps these won’t cover your 5kW AIO of course. Wires and breakers will need to be bigger.

My 48V nominal, 100 Ah LiFePO4 battery has a Chint CB-125 breaker in it.

I’ll see if I can put a picture here :