Fuse Questions

[monsterdeer]

My solar setup:
4 12v 100amp lithium batteries in parallel
60 amp MPPT controller
8 100 watt Renogy panels in series
4000 watt inverter
2 500amp battery monitors--I bought the renogy first and added a victron for bluetooth
600 amp bus bars
I am using 4/0 + and - to the inverter from the bus bars
I will run 4/0 from the battery pack to the bus bars

Fuse/Circuit Breaker--Any suggestions?

Output from the main terminal of the inverter--32 amp CB
Output from the 32amp CB inverter breaker goes to three 15amp CB's for three lines--each line 15amp GFI outlet
450amp fuse from bus bar to inverter
20 amp CB on solar panel array
60amp CB from controller to battery pack

I have two 12V low temp relays that shutdown at 33-34 degrees--one shuts down the solar panels and one shuts down the controller (overkill). I also have a 12V clock, a 12V coach temp gauge, the inverter display switch has a power on/off switch and both battery monitor shunts. All goes to a fuse box. I installed a CB from the fuse box which is sized for the highest amp rating of the gauges, relays and battery monitor shunts, that go to the fuse box--the CB is handy to turn the fuse box off.

I use the CB's for protection and to have the ability to turn off each circuit. I think I have no parasitic power loss?

 

[Siamac]

You've overdone it, so I think you should be OK. Here's what I'm planning to use:

https://www.amazon.com/gp/aw/d/B09NYFRMSK/ref=ox_sc_saved_title_10?smid=A3VVXZCJ717A91&psc=1

Amazon.com

 

[fmeili1]

You've overdone it, so I think you should be OK. Here's what I'm planning to use:

https://www.amazon.com/gp/aw/d/B09NYFRMSK/ref=ox_sc_saved_title_10?smid=A3VVXZCJ717A91&psc=1

Amazon.com

Have you already installed the Heschen DC breaker? I'm thinking of using a similar version (but single pole) for my chargeverter project, but I'm not sure about the quality of these breakers.

 

[Siamac]

Not yet. It's not as easy as I thought it would be

 

[fmeili1]

Not yet. It's not as easy as I thought it would be

ok, thanks.

 

[robbob2112]

Put a MRBF fuses with holders on the positive post of each battery. In the event of a fault it will keep the others from dumping current into the faulted one. I typically recommended 1.25 times the BMS current, so 125amps for your 100a BMS and wires to match.

To the inverter add a class T fuse sized at 400amps. 4/0 wire for that.

4000 / 12.8 * 1.25 = 392... so 400a

 

[mikefitz]

60 amp MPPT controller
8 100 watt Renogy panels in series

The input limit of the 60 A controller, (Renogy or Victron discussed In previous posts), is 150 volts. 8 Renogy panels in series produces in excess of 170 volts. If you have a different controller with a higher solar input limit, then ignore this comment.