Yes have a 200amp circuit breaker very close to the batteriesThe Victron battery protect is a fet bases low loss one way switch that disconnects loads when the battery volts fall below protection volts.
Using the input post of the BP to feed the inverter is not a problem, although using a positive buss bar for cable connections is ideal.
Regarding the volt drop , all parts in the feed to the inverter can Introduce drops, do you have overcurrent protection , fuses or breakers, and any isolator switch?
Mike
Yes, I have the inverter connected as per image on the right.From Victron BP user manual:
View attachment 150834
Awesome, will definitely test breaker. CheersMeasure the drop across the breaker, any breaker even the high quality products, have significant drop at high currents, suggest using a fuse, at 12v a MRBF, in a Blue Sea holder is OK, or ideal, classT or HRC fuse, rated for DC . As discussed the actual current may be higher than 200 amps at inverter full power, consider a higher value, ( subject to adequate cables)
Mike
Yes great idea. I can even use my thermal imager for this. Also agree, cables will need to change. I was thinking of pulling out the existing and going for 73mm2 welding cable but, as suggested above, it will be easier to run another of the same 53mm2 cables.Here is a good way to test where your problem connects are…
Start running your system at a high but sustainable load. Then put your fingers on everything. You will feel some place’s getting warm. That heat is resistance and voltage drop. You can also use a digital Multimeter and see what the voltage drop is at that connection.
Fix the issues and retest. I agree you probably need thicker cable or double up what you have.
Good Luck