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by gbraad 1143 days ago
Made something similar that outputs 12V/24V to use an inverter for 220V appliances. Which also allows generic USBC adapterw for the car to work, which do a much wider range of voltages than just 20V (with the ducurrent limitation of max 100W/5A).

Mostly have been using it to charge Lipos for RC (cars and drones) on the go.