Your best bet probably to get an alternator DC-DC charger like Ecoflow or Bluetti That can have up to 800W (with the engine running) to charge your Jackery (if it can take it.)
I have Fumoto valves on every cars/trucks/motorcycles I own right after the 1st oil change for the last 40 years... Highly recommended! Just flip the lever and drain the oil without even get a single drop on my hand.