Changing from AGM dual battery to a Goal Zero 3000x in van

[Diogenes]

Presently my 1994 Ford van has a 130 Amp alternator, one 12v starting battery, a Surepower 12023A battery isolator connecting to a Fullriver DC115ah AGM battery, then into an inverter (no solar). I own three different lithium "solar generators" a Goal Zero 3000X, an Ecoflow Delta 1300 and a 292wh Jackery/Honda. I finally understood that I could replace my existing dual battery set up in my van with one or more of these mobile power banks. The question I have is, how can I charge these while driving from my van alternator? Using the standard car charging cable would take forever to charge some of the larger units. J don't usually camp where there is any kind of shore power hook up. Any suggestions would be appreciated.

 

[wme]

The Ecoflow has an MPPT controller built in.
You need heavy wires going to the battery, use a DC to DC stepup converter 12v to 24v, 10 amps. That becomes your "solar panel". The Ecoflow accepts 15 amps and 10-60v from solar