Kugel Ludens

I'm doing some research and analysis for an off-grid solar home I'm planning to build starting next year. I came across some information about the NiFe battery as an alternative to flooded lead battery. Does anyone have any experience or thoughts about this type of battery? I've heard they're prohibitively expensive, but their lifecycle costs are better due to lower maintenance cost. Any thoughts would be appreciated.

Kugel

Great looking work Brent.

A quick question if you have the time.

Can you ballpark cost of materials? I talked with a guy that bought the Yeoman's frame to hold the 5x shank setup and he said the cost for just the frame was around $7K USD. Which seemed spendy.
Also are you familiar with the Open Source Ecology Subsoiler? (http://opensourceecology.org/wiki/Subsoiler). The shank design needs work but the simple frame design CAD is nice.

thanks

Looks Great! Can I ask how you determined your swale spacing interval (~25 ft)?