Question:

I just bought an old homestead that I am setting back up.
 
 There is a drilled well, 6 1/8 ID casing. The water level (unused) is
 12' below grade. Currently there is a 230V submersible pump at 122'
 feet down. It is a 1/3 hp 3 wire pump from Franklin Electric.
 
 We are not connected to the grid and are trying to avoid it. I have a
 small gas genny (950w), but it only has 12vdc and 110vac output.
 
From the well head, the water line runs on an angle through the open
 air, up to the peak of the house, and down into a 500 gallon water
 tank in the attic for gravity feed. Water can not be left in the line
 all the time, it is set to run until the storage tank is full, and
 then the line drains back to the well so it doesn't freeze.
 
 What I need is a solution that would replace the pump, using either
 110vac or 12vdc (or 24/36/48).

Answer:

You may be able to use a push-pull arrangement
with two 12vdc pumps, one at the well-head and
one at the elevated tank.

Probably need to delay the top one until the
bottom one builds head.

I am guessing since I am an amateur plumber.

Have you checked the supports of that 500gal
tank in the attic? When filled that is a huge
amount of weight!