

If money isnt a big issue and you want something truly beefy for a solar system I would recommend something like this then. Your solution is essentially a usbc-pd car charger without the ability to remove from a cigarette plug. You would achieve the same affect wiring up a female cigarette car plug and buying a regular pd car charger with the bonus of being able to swap the outlet out for other 12v car plugs as needed.
If you want an integrated charger thats fine though at the end of the day theyre all just fancy variable dc to dc converters that take in 12-24v and pop out the usbc-pd voltage ranges as rated. just wanted to give you some options.
Im a electical engineer and made my own 200w solar system. I feel your pain had to mcguyver some stuff to run off usbcpd. LMK if you want to talk shop. Related guide I wrote explaining USBC-pd and dc-to-dc on lemmy
To charge your 48v ebike battery you will probably be looking at a proper 48v solar charge controller from victron then. They are expensive but worth it. dont want to fry your battery with no-name brand junk pwm advertising as mppt. , Though you can get away with the cheaper 48v 100/20 or 100/10s versions if you want to save some cash. a single 12v solar panel wont cut it though you need a couple 200w or 400w foldups chained to add voltage up to around 48v to charge a big battery effectively.