The magic of DC-DC voltage conversion
I have recently found that converting higher DC voltage (48v or higher) down to 5v is rather difficult. Or at least there are not many isolated options on the market. I have a diy home battery system that runs on 48v and it has been very difficult to get anything to work and not fail within a week or two. I started with various sizes of buck converters, but it seems that they are too noisy and get blown out by voltage spikes or dips when the inverter kicks in or cuts off. I finally found some isolated converters that convert dc-ac-dc through induction. But the largest I could find can do 5v at 1amp. So I had to get two of them just to handle a raspberry pi zero and an esp8266.