Xantrex Inverter

[Traveling Angels]

Anyone with Lithium Battery package have trouble with running Microwave? It shuts off for low battery voltage shutoff! It will be at 13.2 and immediately drop to 12.1 and shutoff! Has anyone else changed the low battery voltage shutoff parameter in their, inverter? If so, what was a good level for setting? Thanks!

[Tom and Doreen]

Yes I've had that problem.  In my particular case the circuit breaker ( under the street side bed - Optifuse 300A 48V ) on the input side to the Xantrex inverter was bad, the contacts were pitted.  This caused a voltage drop when subjected to a heavy load such as when the microwave was used. Depending upon what year your trailer is you may have different components, some trailers have a marine switch instead of a circuit breaker.  In my case I replaced the circuit breaker with a marine switch.  

To be safe give Oliver service a call to see what they have to say.  

Edited 18 hours ago by Tom and Doreen

[Geronimo John]

Step One:  I agree with Tom and Doreen's post. 

Step Two:  If you put a volt meter on each side of the breaker and use a common ground for the - lead, you can measure the voltage drop thru the breaker.  

If it is nominal, then the next step I recommend is using your brake temperature IR gun to scan all the 4/0 terminal temperature.  They all should be about the same.  If you find one hotter, then make the system safe and clean that terminal.  Then retest a second time.  Clean the next hottest one and retest.  Repeat until you see all of them about the same temp.

Good luck.

GJ

[Snackchaser]

Your stated battery voltage of 13.2 is on the low side, which suggests that the battery charge is low.  You also mentioned that the  inverter cutout on low voltage at 12.1, try setting it to 12.0.   Also look to see if there is a low voltage cutout delay setting.  This accounts for larger current spikes and it should be around 15 seconds.  

If the battery was full, and voltage is still that low, then defiantly look for a high resistance connection, such as the 300 amp dc breaker.  It's easier to check the breaker by taking a voltage reading across the input and output terminals, first with microwave on, then with it off.  The microwave's current load should result in less than 0.5 volts difference.   When hooked to shore power and charging the battery, or running a convection oven, the load is higher and voltage drop would be higher too.

Good luck and let us know what you find.  Geoff

[jd1923]

1 hour ago, Snackchaser said:

Your stated battery voltage of 13.2 is on the low side…

For sure. Ours reads the same 13.2V now and we’re at 48% SOC. We’ve been parked unplugged for the week, running the fridge on DC.

And that much voltage drop? Battery health or wiring? Get rid of that Optifuse breaker, replace it with an ANL fuse, clean/tighten all terminals.

[Geronimo John]

5 hours ago, jd1923 said:

We’ve been parked unplugged for the week, running the fridge on DC.

nice!

 

[Geronimo John]

I note that some of the newer trailers have a 300 amp DC breaker.  Fortunately ours is a 300 amp fuse.  Good suggestion to upgrade the breaker.

GJ

[Geronimo John]

9 hours ago, jd1923 said:

And that much voltage drop? Battery health or wiring?

JD:  Battery health with a 2023 should not be an issue.  But you are correct in mentioning it as a possibility.  Hopefully some how he didn't get Battleborns slipped in......

Traveling Angels:  If the above testing does not lead to a conclusion, then JD's hint that the batteries themselves could be an issue.  If you have more than one, then they would need to be individually charged to SOC 100% and load tested. 

What are the brand of your Litho's?  

GJ

Edited 3 hours ago by Geronimo John

[FloraFauna]

16 hours ago, Tom and Doreen said:

Yes I've had that problem.  In my particular case

Same.  Circuit breaker issue.  Since I was still under warranty we had it traced and repaired at a service center under guidance from Oliver.  This doesn't seem to be an uncommon problem for Oliver's of a certain age.  @Traveling Angels is your trailer from about 2022 or 2023?