Battery Post Heat

[Q-Dog]

That smaller gauge voltage sensing wire can be moved to another battery terminal.

I mentioned this before. That wire has it's own fuse. I would put it on top of the fuse holder, under the hold down bolt, not on the fuse.

 

[jor_tucson]

That smaller gauge voltage sensing wire can be moved to another battery terminal.

Did that yesterday. Don't know why I didn't do it originally. Thanks.
jor

 

[jor_tucson]

OP here. Finally have only one connection on the positive battery 250a fuse. I moved the inverter connection to the bus. As several of you predicted, this cleared up the issue of the terminal getting hot. Thanks to all for your help.
jor

 

[robbob2112]

OP here. Finally have only one connection on the positive battery 250a fuse. I moved the inverter connection to the bus. As several of you predicted, this cleared up the issue of the terminal getting hot. Thanks to all for your help.
jor

This may be cleared up but I still see a potential problem - a lug followed by the MRBF followed by a lug. Would be better to have a bus bar and connect both batteries to it with equal length cables. MRBF on each battery equal to 125% of that batteries capacity - i.e. if it is a 100amp BMS use 125amp fuses. The way you have it now if a battery has a short in it the other will dump current right into and potentially cause a lot of heat.

and if you are stacking lugs on the negative side see if you can eliminate those as well.

 

[mikefitz]

the end of the battery post is pretty hot @137 degrees

It seems that it's not a genuine Blue sea fuse holder,
Blue sea,

Low cost copy,

 

[robbob2112]

Actually I have a blue sea that looks just like your bottom picture. It was in blue sea packaging but says Eaton on the side.