GLS580 Tow Hitch Wiring capacity
01-14-2023, 05:16 PM
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GLS580 Tow Hitch Wiring capacity
Have a 2020 GLS580 (x167) with factory towing package (Options 550, 557). The 12V pin 4 - tow vehicle 12VDC (in 7-pin trailer jack) is fuse 453 - 20A - in the rear fuse panel.
Our trailer has a Victron Orion-TR Smart 12/12-30A non-isolated DC-DC charger for the trailer batteries. The input to this charger is the 12V on jack pin 4. When I turn on the charger, it blows the GLS580's fuse 453 @ 20A. The trailer's DC-DC charger needs 30A capability on jack pin 4.
What size wire feeds thru fuse 453 to pin 4 on the trailer hitch jack? If 10 AWG, that is capable of 30A. Is there a relay or other device that limits the pin 4 connection to the 20A?
73/gus
Our trailer has a Victron Orion-TR Smart 12/12-30A non-isolated DC-DC charger for the trailer batteries. The input to this charger is the 12V on jack pin 4. When I turn on the charger, it blows the GLS580's fuse 453 @ 20A. The trailer's DC-DC charger needs 30A capability on jack pin 4.
What size wire feeds thru fuse 453 to pin 4 on the trailer hitch jack? If 10 AWG, that is capable of 30A. Is there a relay or other device that limits the pin 4 connection to the 20A?
73/gus
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Splaktar (01-21-2024)
01-16-2023, 10:40 PM
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'21 AMG53 wDPP & ARC, 19 GLC300 - Former- 10&14 ML BlueTecs, 20 GLE450 E-ABC, 15 Cayenne D, 17 Macan
I can't answer your 10ga question without some research. It's at least 12ga, but I'll see if I can get s definitive answer.
The Victron charger is nice, and a preferred way to protect electronics. But what would happen if you bypassed your DC/DC converter for travelling and just went direct? Would there be less current requirement?
Some of those, especially sine wave converters, can draw extra power.
The Victron charger is nice, and a preferred way to protect electronics. But what would happen if you bypassed your DC/DC converter for travelling and just went direct? Would there be less current requirement?
Some of those, especially sine wave converters, can draw extra power.
Last edited by mikapen; 01-16-2023 at 10:49 PM.
