2007 Battery Voltage
April 20th, 2013, 6:01 PM
#1
2007 Battery Voltage
Ok, well some of you didn't believe me when i said according to the gauge on the dash the voltage was 15 volts. And then others said the gauges are inaccurate.
Well, according to my Tekonsha P3 the gauge is pretty accurate!
Voltage at idle and on highway 15.2 volts (second pic) (pic was taking while on highway)
And then SOMETIMES after over an hour of driving the Voltage will drop down to around 13.2 volts (first pic) but this makes our power inverter (if we use it) beep like crazy due to voltage drop over the cheap very undersized wiring to the outlets.
Well, according to my Tekonsha P3 the gauge is pretty accurate!
Voltage at idle and on highway 15.2 volts (second pic) (pic was taking while on highway)
And then SOMETIMES after over an hour of driving the Voltage will drop down to around 13.2 volts (first pic) but this makes our power inverter (if we use it) beep like crazy due to voltage drop over the cheap very undersized wiring to the outlets.
Last edited by Joe In NY; April 20th, 2013 at 6:03 PM.
April 20th, 2013, 9:04 PM
#2
Administrator
IIRC, we said that w/ the way the computer controlled regulation system, the voltage varies from 11+ to 14-15. Supposedly improves mpg. Probably about as effective as AFM.
April 20th, 2013, 10:03 PM
#3
hmmm... well AFM I find is decently effective, this variable voltage crap, not so much.
On way down to FL afm was in V4 for a good deal of the trip. (Got 16.5 mpg for 2/3 of the trip!
) And we got to Keuka Lake and back every weekend in the summer (2 Hr drive) and V4 mode is plenty to make a noticeable difference in mileage.
On way down to FL afm was in V4 for a good deal of the trip. (Got 16.5 mpg for 2/3 of the trip!
) And we got to Keuka Lake and back every weekend in the summer (2 Hr drive) and V4 mode is plenty to make a noticeable difference in mileage.
April 21st, 2013, 8:44 AM
#4
Administrator
I've had two w/ AFM and both only went into V4 mode on level roads below about 50 mph or w/ a tail wind at higher speeds. That said, I get about 17-18 on hwy at 70 and about 12-13 in town.
My Mercedes Airstream Sprinter RV diesel gets that and weighs a lot more w/ more air resistance.
My Mercedes Airstream Sprinter RV diesel gets that and weighs a lot more w/ more air resistance.
April 21st, 2013, 11:43 AM
#5
hmmm... I generally do 75mph on the highway and i still V4 a decent amount... hmm.. WEll since I did my sprack plugs my mileage wen tup from 14.4 to 15.2. I can't complain about that.
I would love to have that RV you have, not huge but not small, great for traveling. What kinda of motor does that puppy have?
I would love to have that RV you have, not huge but not small, great for traveling. What kinda of motor does that puppy have?
April 21st, 2013, 2:43 PM
#6
Administrator
I have used an inverter on trips before to charge the kids electronics and have never seen an issue with it dropping out... interesting...
April 21st, 2013, 8:09 PM
#7
We are planning on running a dedicated circuit to a power inverter that we plan on mounting under the right rear captains chair. That way its hidden and wont suffer voltage drop from the crappy outlets.
I like what gm did for our 2002. It had a door covering 4 outlets under the radio, out let in center consul, an out let for the captains chairs and the outlet in the trunk. The alternator also was not variable so no probs with voltage ever and the wiring was better because we never burned any outlets and the same compressor that we use now runs much slower and then burns out the outlets in our 2007. so, if we have to use little compressor, up goes the hood and straight to battery, it runs real fast from there...
I like what gm did for our 2002. It had a door covering 4 outlets under the radio, out let in center consul, an out let for the captains chairs and the outlet in the trunk. The alternator also was not variable so no probs with voltage ever and the wiring was better because we never burned any outlets and the same compressor that we use now runs much slower and then burns out the outlets in our 2007. so, if we have to use little compressor, up goes the hood and straight to battery, it runs real fast from there...
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April 22nd, 2013, 10:13 AM
#10
Administrator
I have had no luck either 
even checked EBay...
I know they have them because the lady at the car show a few years back stopped me from taking the Hybrid Tahoe on display apart so I could see what the inverter looked like
It was located in the jack stowage area, I had climbed into the back of the Tahoe and pulled the stowage cover and was digging around to try and see the inverter assembly. It appeared to be fan-less and that is why I was wanting to see it before she kindly asked me to get the hell out of the truck and quick taking it apart
even checked EBay... I know they have them because the lady at the car show a few years back stopped me from taking the Hybrid Tahoe on display apart so I could see what the inverter looked like
It was located in the jack stowage area, I had climbed into the back of the Tahoe and pulled the stowage cover and was digging around to try and see the inverter assembly. It appeared to be fan-less and that is why I was wanting to see it before she kindly asked me to get the hell out of the truck and quick taking it apart