Cisco Power Used MIB

 Well I believe that I have found the PS section of the MIB database - 1.3.6.1.4.1.9.9.117.1.1

However anything I try to add seems to give me non-sense values that don't match up with the values that I see on the switch.

Anybody have any luck pulling accurate Cisco PS information ? 

You'll want to use OID 1.3.6.1.4.1.9.9.117.1.1.4.1.4 to look at the current draw and OID 1.3.6.1.4.1.9.9.117.1.1.4.1.3 to look at the max available.

I was checking this out on my 4506 switches (which have redundant power supplies running in redundant mode).  When I looked at the values returned, they were double what they should be.  I then moved the redundancy mode to combined, thinking maybe that it was a glitch.  But that got doubled as well.

Seems to be a glitch somewhere.  But at least you can still see how much inline power is being used percentage-wise.  Plus you can just do the math to get the real numbers. 

I know it seems like the inline power values are doubled, but it's actually a little more complicated.

The unit of the value given by 1.3.6.1.4.1.9.9.117.1.1.4.1.3 and 1.3.6.1.4.1.9.9.117.1.1.4.1.4 is 'centiAmps' @ 50v. If the math to determine wattage is WATTAGE = AMPS * VOLTS, the resulting math for this situation would be:

(OID Result) * 0.01 * 50

I'm assuming OID result for the above example for drawn inline power was 81. Making the math look like: 82 * 0.01 * 50 = 41

Hope this helps.