Can I safely get that power out of any of the nucleo PD boards with a usb3 pd input? Can I get any higher current or voltage?  Output is 2 pin barrel connector. Target application is fully documented here. Thanks so much in advance Joe 

The software download link points to source. Many thanks in advance Joe

Is there a reference design/app note for "pass through" power delivery chargers/battery packs with these MCUs? IOW I'd like my design to do the following; -If connected to mains power/a small solar panel, charge the batteries while powering the load....