You are risking a fire. Default 35mm^2 equivalent in the U.S. is NOT rated for 100A.
the 35mm2 cable I have is rated to 188A.
I just spoke to a solar place, told them what I have, they said it is fine to put a 125A breaker between the mppt 250/100 charger and batteries running 35mm2 wire. They sell this charger. But, it makes sense what you are saying.
You must have wire rated for 100A.
You have 16 * 440W = 7040W on your 250/100. It is over-paneled and will never output more than 5900W @ 59V.
This is why you need 120-140A fuse/breaker.
yes, I have over paneled my system. And yes, the victron will only pull in 5800w max. So the 125A fuse between battery and charger will be fine.
Thanks once again.
Your PV wires between bus bar and MPPT MUST be able to handle at least 55A, and you must have a fuse/breaker to protect that wire. 1.25X 55A, round up to nearest common size.
Yes, thanks, I will do this ;-)
The 4mm2 wire is rated to 57A at 140F.
ELECTRICAL CHARACTERISTICS
Voltage Rating
EN50618 & IEC62930 AC: 1.0/1.0kV; DC: Max.1.5kV
Ambient Temperature -40°C up to 90°C
Insulation Resistance At 20℃ ≥ 709 MΩ.km
Current carrying capacity AT 60℃ 57A
Spark test 10000 VAC
Voltage Withstand 6500 VAC
Conductor Resistance AT 20℃ ≤ 5.09 Ω/km