Powering Blue Board

[allsorts]

I am looking for ideas on the feasibility of possibly of powering the system blue.
POE powered:
Use a POE to USB adapter (Something like PoE Splitter with MicroUSB Plug)
Solar with super caps
Use more super caps, but concept is there (Something like 5v Solar Power Supply)
Can anyone lend some incite into how they have been powering their devices outside of the basic USB plug?

Power it as it is designed to be powered:  a good quality USB 5V supply.  Don't waste your time trying to innovate with power supplies unless there is some extreme reason to do so. You're working in the 'noise' band trying to select some specific noises. Don't add opportunities for more noise... especially when installing and optimizing, and learning what you've joined.
Folks have done both... success varies per individual, location, need, etc.
Solar Supplies are notorious for noise. The controller needs to be where you can access it so why POE?  Poor, noisy power supplies and many so called 'chargers' are a big percentage of 'issues' with systems.  If the currently installed jack has power to the controller 5V line, you can POE, but why????  You sure don't want a glitch sending 48V hard and heavy spike into the controller! Do NOT underestimate the importance of the designed power supply, but you really don't need to 'overkill' either.

Yes, you are absolutely right. Please use the recommended power supply to stabilize and avoid unnecessary complications. Power quality is important, especially in noise-sensitive applications.

Why do you need access to the controller?  The last time I visited mine was to try and upgrade the GPS modules firmware due to the date problem. Before that I hadn't visited it for years.

Why use PoE? 'Cause it's only one (low voltage) cable. No mains power available. No need for a mains USB PSU/Charger that are slightly prone to going BANG! Noise, well unless you manage to find a USB PSU or a PoE adapator(*) that is quiet that'll always be a problem. A low pass filter in the supply wires works wonders. You can remotely do a power down reboot by either unplugging the ethernet cable from the PoE source or using the PoE sources web interface to toggle the PoE on the relevant port.

(*) PoE adapters are just SMPU'S that happen to take 48 V DC instead of mains. Everything else is the same, few 10's of kHz of drive frequency to a chopper FET feeding the primary of a small transformer, bridge rectifier and smoothing on the secodary side. Note that transformer it would be virtually impossible for the 48 V to end up on the output due to the isolation it provides. Not to mention the 48 V isnt there until the source has verfied the destination would like to have PoE.