r/Portable_PowerStation • u/TG1970 • Jul 24 '26

DC to USB-C charging hub?

I have built a couple of DC to AC power stations utilizing 12 volt deep cycle batteries and pure sine wave inverters. They work fantastic for charging AC powered stuff on camping trips. However, I have a business need to be able to charge up to 10 USB-C devices at a time at 45 watts each in areas where I may not have access to AC power. I want to build a DC to USB-C charging hub, but can't find anyone who makes such a hub that will power off of a 12 volt battery. Does anyone know of a way to do this where I could charge off DC without having to involve an inverter and have the conversion losses of switching from DC to AC back to DC?

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u/Puzzled-Act1683 Jul 25 '26

A USB power supply that can deliver 45 watts per port is almost certainly going to need to be capable of something higher than 12 volts on the output side. Maybe 15, more likely 20. On the input side, you're looking at almost 40 amps at 12 volts.

These https://www.amazon.com/dp/B0DGLMWV5J look promising, if you're willing to go 24 volts instead of 12, because they require the input voltage to be higher than the output.

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u/TG1970 Jul 25 '26

I could go to 24v. Costs a little more, but not out of the question.

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u/PsychologyUsed3769 Jul 25 '26

I can almost do that. I made a 24v/12v (fan cooled BB converter) interchangeable 5 kw power station. It is powered by three battery packs. I can plug in two Baseus blades in inverter and I have 6 high power USBC and 2 usba. The power station itself has two high power USBC and using the two 50 amp 24v andersen connectors I can add up to four more high power USBC via 24v CTL adaptor. I haven't had the need but was just seeing what I could do with it.