12Volt issue inside trailer

[Buddhabelly]

Have an elite1 with just a charger. House power cord came disconnected and drained AGM batter totally dead. Was able to recharge it with a commercial charger and now holds 12.5 volts but, I have no power for 12 volts items.  I checked the power coming in from the battery and I get power to the bus bar and after that, I'm lost to where to trace for the lost of power. The charger is working because everything is working when useing 115 volts.  Can anyone recommend where I should be looking for somekind of breaker I can't seem to find.  No power going to the 12v fuse box either. Appreciate any help here....

[Steph and Dud B]

None of the 12v items work? Lights, fan, USB outlets?

[Galway Girl]

I think there may be a blown reverse polarity fuse:

 

from ai search

In an Oliver Legacy Elite I trailer, a reverse battery fuse (often labeled as a reverse polarity fuse) acts as a sacrificial safety shield to protect the trailer's electrical system if the house batteries are connected backward. [1, 2]

 

How It Works

• Instant Disconnection: If the positive and negative battery cables are accidentally swapped during installation, a massive surge flows backward. The reverse polarity fuses instantly blow to break the circuit. [1, 3]
• Downstream Component Protection: By blowing immediately, they stop the reverse current from frying sensitive onboard electronics, such as the WFCO power converter, the Xantrex or Freedom XC inverter, circuit boards, and 12V appliances. [1, 2, 3]

 

What Happens When It Blows?

• No 12V DC Power: The trailer will immediately lose all 12-volt battery power (lights, water pump, jack, etc.).
• No Battery Charging: Even if you plug the trailer into shore power, the Oliver power converter will not charge the house batteries because the path between them is physically blocked by the blown fuses. [1, 2, 4, 5]

 

Where to Find It

In the Oliver Elite I, these are typically two high-amperage (usually 30A or 40A) blade fuses located directly on the face or side of the main 12V DC distribution panel/power center. They sit slightly separated from the smaller individual branch circuit fuses. [1, 2, 3, 4]

If you need to replace them, ensure the battery cables are corrected first, or the new fuses will pop instantly upon contact. [1, 2]

If you are currently troubleshooting an electrical issue, please share:

• Are you getting power from shore power but not the battery?
• Have you recently swapped or disconnected your batteries?
• Are there any error codes showing on your solar controller or inverter display?

 

AI can make mistakes, so double-check responses