Collectors could be used for trade on Jump-1 mains if you used them as Jump ships.
Strip out M drives (which has the benefit of shrinking the power plant as well and freeing up space) and the ship loiters at edge of the 100D main world limit. It charges up over the week and doesn't have to bother with extending/stowing the canopy as it never accelerates.
STL ships or Barge modules arrive and dock with it and pay their 'Jump fee'. When full it jumps to the next system, disembarks the barges and recharges again for the return trip. The benefits are a fairly regular schedule (as opposed to tramps), massive savings in fuel, lots of extra space to move things.
I see them a lot like the old
Jump ships in MechWarrior. They even have the
giant solar collector trailing behind them.