5W in real-world changing weather is about the minimum I would want for practical use in a sustained power outage situation. Just enough to keep a phone charged for entertainment, and an 18650 charged up to get me through the night.
Pretty cool thing to have. I cant wait for mine to arrive. Ill be charging power packs with it and using the power packs to change mobile devices and batteries for flashlights. Im impressed it did over 3amps at 4.3volts on the video
BW-L3 managed to clock 1A per channel easily with partial clouds about to sea level height. I couldn't plug in two USB testers simultaneously as there was not enough spacing in between the ports. That was why i had to reschedule for another day where weather is more ideal.