SELF 48V ‘in house’

Convert from 48V SELF to 12V

https://www.aliexpress.com/wholesale?catId=0&initiative_id=SB_20161230075556&SearchText=48v+to+12v+switching+converter

USB-C / USB PD / QuickCharge 5/12/20V chargers

Concept: take 24/48V, bucks to 5, 12 an 20V, wire to USB charge controller chips

Charge Chips

• NCP4371
• CHY103
• TI
• Microchip

Evaluation boards

http://in.element14.com/microchip/evb-upd1001dc2/eval-kit-upd1001-usb-power-supply/dp/2450804