John303 ,
I'll check my output voltage from my truck while disconnected from the trailer. I didn't check the wiring on the truck but the trailer wiring on the pollock plug looks like 10 AWG. The decision was made to disconnect the 7 pin charge wire from the frame mounted breaker and connect this directly to the 8 AWG and on to the DC DC input. This would help with the voltage drop since this is around another 12ft of wire. My charger is not isolated on the negative side from the 7 pin which runs though the pollack trailer plug and to the trailer frame in the original location. However the negative input to the dc dc is from the negative busbar and the output also runs back to the negative busbar. The negative busbar is grounded to the left side of the trailer frame via 4ft of 4AWG welding cable. I was initially concerned about this ground loop type condition since the Renogy is a non-isolated charger but I cleared this with an EE friend from work. The positive wire from the truck is isolated and ran directly to the input of the DC DC charger.
The link you provided looks like a 30 amp charger where I was able to find an 18 amp output charger on the Victron site. When looking at the 18 amp version, it can output as much as 25amp which means it would draw higher current than this. When testing my Renogy before wiring it in, I witnessed an output current no higher than 21 amps with a peak at startup at around 27 amps. Looks like there are quite a few settings on the Victron charger. Are you using custom settings or is there a selectable Lithium algorithm to handle the settings? Also it looks like the Victron uses screw terminals. Are you using ferrule's for these connections? If so what I've done to get a better connection when using these is to not use the crimping tool but to let the screw connection crimp the ferrule. This locks in the ferrule and provides a more robust connection IMO.
https://www.victronenergy.com/upload...50-400W-EN.pdf
Jim
I'll check my output voltage from my truck while disconnected from the trailer. I didn't check the wiring on the truck but the trailer wiring on the pollock plug looks like 10 AWG. The decision was made to disconnect the 7 pin charge wire from the frame mounted breaker and connect this directly to the 8 AWG and on to the DC DC input. This would help with the voltage drop since this is around another 12ft of wire. My charger is not isolated on the negative side from the 7 pin which runs though the pollack trailer plug and to the trailer frame in the original location. However the negative input to the dc dc is from the negative busbar and the output also runs back to the negative busbar. The negative busbar is grounded to the left side of the trailer frame via 4ft of 4AWG welding cable. I was initially concerned about this ground loop type condition since the Renogy is a non-isolated charger but I cleared this with an EE friend from work. The positive wire from the truck is isolated and ran directly to the input of the DC DC charger.
The link you provided looks like a 30 amp charger where I was able to find an 18 amp output charger on the Victron site. When looking at the 18 amp version, it can output as much as 25amp which means it would draw higher current than this. When testing my Renogy before wiring it in, I witnessed an output current no higher than 21 amps with a peak at startup at around 27 amps. Looks like there are quite a few settings on the Victron charger. Are you using custom settings or is there a selectable Lithium algorithm to handle the settings? Also it looks like the Victron uses screw terminals. Are you using ferrule's for these connections? If so what I've done to get a better connection when using these is to not use the crimping tool but to let the screw connection crimp the ferrule. This locks in the ferrule and provides a more robust connection IMO.
https://www.victronenergy.com/upload...50-400W-EN.pdf
Jim
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