What is official input voltage to supply to the VP2 ISS? SIM solar panel seems to put out 3V or less in full sun, but I believe I saw where the A/C adapter for the console is 5V. Does the ISS pull from the battery or super capacitor even when the solar panel is lit up to get the total input up to 5V or is the A/C adapter's 5V knocked down to 3V on the board?