Amperage Between Battery and TT?

120 amps is more than the normal loads that any RV will have at one time. Your battery capacity is probably 110 to 220 amp hours total, and will get used over at least 4 hours (less than 50 amps per hour) and more likely over 3 days at less than 10 amps per hour average.

Even a 120 amp plug is OK to exceed that amount for short durations, such as running a inverter with microwave for 3-10 minutes. This 150 amp load will not significantly overheat the connector.

Fred.

no

This tutorial may be of some help. 12v side of life.

120 amps should be plenty. :)

marcsbigfoot20b27 wrote:
I added this last week. 175 amp with 2 ga wires.

Nice!

I added this last week. 175 amp with 2 ga wires.

No, 120 is fine.

BFL13 wrote:
Depends on your charger or inverter loads. Most RVs wire for just the charger amps like 55 amps or whatever your converter does so the 120 is plenty.

Note the wire size limit #4 to #10 where #4 is rated for 100amps. The 350 must allow way fatter wire.

Thanks! The 350 amp model is for 8,000 lb winches, so I would expect the wire size would probably be larger.

Depends on your charger or inverter loads. Most RVs wire for just the charger amps like 55 amps or whatever your converter does so the 120 is plenty.

Note the wire size limit #4 to #10 where #4 is rated for 100amps. The 350 must allow way fatter wire.