Battery Upgrade
So, I just bought a new 5th wheel toyhauler. It currently has a single 12v battery. I want to seriously upgrade the battery capacity. I had 2 Costco 6v golf cart batteries in my last rig. I think ...
Forum Discussion
No, not enough if you want to run 100A through an inverter.
A battery is full at 12.8V. The inverter alarm goes off at about 11.1V. You got 1.7V of headroom. You don't want a large percent of this headroom going to cable voltage drops.
For example, if you use 0 AWG, 10ft per side, that will drop 0.2V at 100A. That's already 12% of your headroom. You still need to account for the cables to the inverter, perhaps decreasing headroom by 18 to 20%.
I would go with 000 AWG. If the inverter cable length is 6 ft (one way), and battery connect is 10 ft (one way), then voltage drop is 0.19V, or 11%.
A battery is full at 12.8V. The inverter alarm goes off at about 11.1V. You got 1.7V of headroom. You don't want a large percent of this headroom going to cable voltage drops.
For example, if you use 0 AWG, 10ft per side, that will drop 0.2V at 100A. That's already 12% of your headroom. You still need to account for the cables to the inverter, perhaps decreasing headroom by 18 to 20%.
I would go with 000 AWG. If the inverter cable length is 6 ft (one way), and battery connect is 10 ft (one way), then voltage drop is 0.19V, or 11%.
Supereri73 wrote:
Would 1/0 be big enough for say 100 amp load?
