01 Silverado getting 12.7v at power port?

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pishta

pishta

I know I'm right....
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Should I be seeing >13.7 off chevy alternator? My inverter keeps alarming when it goes under 12v.
 
Measure it at the battery. The power port should be close to the same.
 
Pos inverter...13.8 at battery, 13.5 at inverter in. F'n thing reads 13.5 now? Thing bogs hard when I put a load on it , it dropped to 11.9v in with a 15.6v/5A laptop power supply on it. Its rated for 400 watts. ...whatever. thanks.
 
The PCM controls the voltage output of the alt, It shouldn't go that low but if it stays higher than you are O.K. If the battery has a full charge and its not pulling any current than the PCM will not make the alt charge the battery. If it shows low voltage again turn some things on that pull current and see if the voltage drops or goes higher.
 
The wires to most power ports are small 18ga at best, they just wont carry that kind of load without lots of voltage drop.
 
Yea you can't run anything big off of the power port, READ your owners manual. lol
 
Just sign the title over to me and we will get that thing away from you, Problem solved,
 
What a considered big? The inverter has screw lugs for battery hot leads for 'more than 90W' per the inverter manual. It's only pulling 60w now with bog.
 
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