I am setting up a remote solar powered computer outdoors. Originally I was going to use a pi5 but ended up switching to the Radxa X4 in order to run some x86 software and the ease of built in WiFi6.
I had originally built a system that used two 12v nominal (13.8v full charge) lifpoe4 in parallel, then used a switching buck converter to drop the voltage to 8v that powered a 5A 5V linear regulator to power the PI and attached radio’s cleanly.
I just realized today the Radxa is a 12v board and not a 5v board, so I am going to have to rethink my power supply design! I have been experimenting with the Radxa connected directly to my Bench/Lab PSU and have found I can get away with as little as 7V and 3A to power my project, the board only pulls 9v off a USB-C PD supply. At this point ditching power regulation and just plugging directly in to the 12v lifpoe4 battery seems like the cleanest and easiest solution, but I’m not sure if the battery’s will hurt the board when it has a full charge at 13.8v