What is load shedding?

I was just given a 2011 international prostar, and three times last night the truck would beep and a message would come on the dash saying "load shedding". Then all power to the sleeper was cut. What does this mean? Is there something wrong with my truck? I wasn't doing much, just had the heater on and charging my cell phone.

 

that is probably a low battery warning. that is what normally shuts down the sleeper

 

load shedding is cutting off the electric current when the demand becomes greater than the supply. in other words, whatever you were doing was too much for the batteries to handle. probably time to look into replacing one or all of the batteries if indeed all you were running was the bunk heater, but i dont know.

any truck ive been in has had that same function..."load shedding" by shutting off everything before you completely drain the batteries. as the batteries get older, it happens more and more often.

 

Oh, I'll have to tell my shop what's been happening then. It only took about 5-6 hours for it to do that. Thanks for your help everyone. Hopefully they upgrade my truck soon

 

Was anything on in the truck? This is normal on a ProStar.
If i run my bunk fan,tv or other devices it will start load shedding when the batteries drop to about 12.5 volts.

I can run my bunk fan with the engine off for about 4 hours and the beeping starts.
Nothing wrong with the truck unless it is doing it with everything turned off.

 

I was running the bunk heater and charging a phone. Guess I'll just have to get used to it :/

 

this graph will show you discharge rates
so if your tractor starts load shedding at 12.5
it wont be that long after you shut down and run anything
i would run the truck a while just before you go to bed

[TABLE="align: center"]

[TABLE="align: center"]
Digital Voltmeter Open Circuit Voltage Approximate State-of-Charge Hydrometer Average Cell Specific Gravity Electrolyte Freeze Point 12.65 100% 1.265 -75o F (-59.4o C) 12.45 75% 1.225 -55o F (-48.3o C) 12.24 50% 1.190 -34o F (-36.7o C) [TR]
12.06 25% 1.155 -16o F (-26.7o C) [TR]
11.89 Discharged [TD]1.120 [TD]-10o F (-23.3o C)[/TD]
[/TR]
[/TABLE]
[/TD]
[/TR]
[/TABLE]

 

[TABLE="align: center"]
Digital Voltmeter Open Circuit Voltage Approximate State-of-Charge Hydrometer Average Cell Specific Gravity Electrolyte Freeze Point 12.65 100% 1.265 -75o F (-59.4o C) 12.45 75% 1.225 -55o F (-48.3o C) 12.24 50% 1.190 -34o F (-36.7o C) 12.06 25% 1.155 -16o F (-26.7o C) [TR]
11.89 Discharged 1.120 [TD]-10o F (-23.3o C)[/TD]
[/TR]
[/TABLE]

 

Dang, I thought it was a skateboarder throwin' off crap at the truckstop cause he was too heavy or didn't get paid.

 

Yep,And idle it up too.

I think it is a good feature myself.
Being forgetful like me and leaving my cooler plugged in on the weekends....lol!
Plus it is nice to run the bunk fan with the truck off for a few hours just to keep air circulating.

It has never failed to save enough power to start the truck.
Take care of the batteries and they will take care of you.....