Here's a 60w PD power bank that should charge in a couple hours. It only holds 20AH and when charging and discharging that quickly the number of cycles will be reduced. But for the money its the fastest charging one I could find on amazon so you could get a couple. You'll also need a 60w PD wall charger too. So if you already have a bunch of power banks you could get a duffel bag with a power strip in it and everything already plugged in. Just be careful of all the heat in the bag because those 60w chargers get pretty hot.

You could also get a 60w PD car charger or a low wattage pure sine wave inverter to charge while driving. Just make sure your 12v outlet is fused to handle that much power.

Edit: There's also this slightly larger capacity (26800mAh) power bank that comes with the charger, but it charges slightly slower (45w).

Edit Edit: There's also "portable power stations" like this that can charge at 100w. But at that price you might as well build yourself a dedicated solar system or at least install a battery isolator on your alternator and get a deep cycle lead acid.