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  • Depends entirely on the charging circuit really only one way to determine that
    – Ramhound
    Commented Nov 12, 2015 at 1:41
  • @Ramhound: I was expecting the USB spec to say something about what such circuits should accept~ am I correct to understand your comment as an answer that it does not and that there is no de facto standard either?
    – David Mulder
    Commented Nov 12, 2015 at 1:47
  • 1
    i do not see any reason to believe that USB-C connection would differe that greatly from the other USB, if it is not a direct port for power-in like charging a phone/tablet/gps is. There would be a curcuit to deliver power (even higher currents) to a usb device, but not the other way around. en.wikipedia.org/wiki/USB-C Unless designed for the purpose of charging the device. Not only would a standard desktop or laptops motherboard configurations not be set up to work that way, but you could possibly damage curcuits there, as solar charging would have to have an higher votlage.
    – Psycogeek
    Commented Nov 12, 2015 at 2:25
  • 1
    if you wanted to charge a device with solar, you do so (sort of) by replacing what was charging it before , and it presents some unexpected results without a charge buffer (battery) when the devices are not usually designed for sporatic power, and wake up. A laptop potentially a person could feed solar with a controller (some sort of control) right into the battery connects, use the battery as the buffere store, or via the normal power source, probably needing a battery buffer for better regulation and constant power.
    – Psycogeek
    Commented Nov 12, 2015 at 2:28
  • 1
    @Psycogeek I don't know whether you realize, but I was talking about a USB-C power port. For example the new Macbook has a single USB-C port that's used both for peripherals and for charging itself. I already presumed that the best approach would be to keep the device off and charge the battery slowly. Either way, a lot of your comments seems a bit... hard to understand, as solar panels for smartphones are quite common.
    – David Mulder
    Commented Nov 12, 2015 at 9:15