How to test a new adjustable PSU from amazon: http://www.amazon.ca/gp/product/B00GZG7X9Y
Well, I didn't trust it with a sensitive 5V micro (yet)... so a handful of old computer fans will do, they accept a wide input voltage and give a nice varied load.
Managed to draw up to 1.5A on startup (@12V). Impressed, way more accurate then using a separate PSU/amp-meter, which also costs way more
And using a mini-PC that runs off 12V to test this energy meter, which connects...