[RE-wrenches] reliable 12vdc to 5vdc converters for USB charging

[Jim MacDonald]

Hi wrenches

Does anyone know of a decent source where i could buy a converter that pulls 12V or 24v off a battery or load output of a CC and steps it down to 5 Vdc [preferably to a pre-wired USB female connector?]

I am not looking for anything that comes with a module included [like those keychain 1W solar phone chargers], but rather something that will remain hardwired [essentially a USB wall outlet located at the home's indoor DC load center.]

Also NOT looking for the car cigarette lighter adaptor variety, though it will serve the same purpose.

I would like to include these in simple DC-only PV systems for central america, and avoid involving truckstop inverters [going from DC to AC back to DC] to charge cell phones/ mp3 players/ etc.


thanks
Jim MacDonald