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Scenario

I have a LiPo battery connected to a DC > AC inverter and these two adapters (images below) are plugged into the inverter.

Hypothesis

Everything runs fine currently but I know I'm losing juice in the conversion back and forth. Cutting out the DC > AC inverter, AC > DC adapters, and running power straight from the ~12v battery to the 12v devices should work.

Question

The LiPo fluctuates from 12.6v (full charge) to 9v but my shut-off alarm is set to 9.9v. Are there any caveats here? The first adapter from "FSP Group Inc." is for an "Nvidia Jetson TK1" computer so I'd hate to fry that.

Extra

What is the name of the plug on the "FSP Group Inc adapter"? I'd like to buy a separate one instead of cutting that one off the adapter.

LiPo Specs

  • 11.1v
  • 6500 mAh
  • 20C

nvidia jetson tk1 power adapter kinect powered usb adapter

Edit - Power Consumption

Jetson TK1 Power Consumption link

  • Booting up: ~3.6W (for ~2 minutes booting)
  • CLI via SSH: ~1.6W
  • Heavy Disk Usage: 1.6W - 4.7W

  • Input Range: 9.5v - 13.5v

Microsoft Kinect Power Consumption link

  • 12 watts

  • Input Range: 8.5v (~0.42A) - 12v (~0.35A) link

I'm surprised to see that the kinect requires so much more than the computer.

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  • \$\begingroup\$ So to understand if the loads are ok with the setup you describe you'll need to add info about the loads and their acceptable input supply ranges. \$\endgroup\$ – scorpdaddy Jun 24 '16 at 19:17
  • \$\begingroup\$ I found information regarding device power consumption. As for acceptable input supply ranges I'm not sure how to find that out. Everything I found I added to the bottom of my question. \$\endgroup\$ – Jacksonkr Jun 24 '16 at 19:40
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    \$\begingroup\$ suggest reviewing the link you posted above for the jetson tk1, esp elinux.org/Jetson/… The link shows the acceptable input voltage range. \$\endgroup\$ – scorpdaddy Jun 24 '16 at 19:43
  • \$\begingroup\$ It appears I was too hasty, I appreciate you pointing that out. Now that I know the terms to search for I was able to find out more about the Kinect input ranges as well. I've added the results. \$\endgroup\$ – Jacksonkr Jun 24 '16 at 20:00
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    \$\begingroup\$ The other option would be to use a dc to DC boost converter. Less power loss than the inverter setup. \$\endgroup\$ – Passerby Jun 24 '16 at 20:23
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Yes I can

  • LiPo 11.1V DC (12.6V-9.0V) to
  • DC/DC Boost Converter Step-up Voltage Transformer 3-34V to 4-35V 6A Volt Regulator Controller (set to 12V DC output) to
    • Male DC Power Pigtail Plug to Computer (Jetson TK1)
    • I cut off the "DC connector" from the AC adapter for the Kinect's powered USB cable and connected + - of exposed wires direct Step-up Converter.

Note: I couldn't get the Kinect to have sufficient power when going through the transformer so I left the computer on the transformer and connected the Kinect straight to the LiPo since the Kinect supports ~9V-13V DC

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