Thank you, Mark! That sounds like the perfect solution.

Thanks, @Hank21

@Fae, I should have been more clear. I'm planning to use a DC injector such as this "Single Port Power Over Ethernet Passive PoE Adapter": amazon.com/gp/product/B00ENNUWO4/ It supplies whatever DC...

It will be solar-powered, and I’d like to avoid using a stepup converter to achieve 24 VDC.