LiPo SOLAR from retired cells

what do yuo guys think about using 6s LiPo packs on a 24v solar off the grid system?

eg:

10 x 5ah 6s lipo

obvious safety precautions would be needed, like :

smoke alarm(s)
cell monitor/bms cutom micro controller with remote pc access.

physically (from anything) isolated pack like in a water proof box away from any buildings.

this system looks like its customizable enough to not over charge the cells but the micro controller would do that anyway.

http://www.jaycar.com.au/productView.asp?ID=MP3724&form=CAT2&SUBCATID=1004#12
manual:
http://www.jaycar.com.au/products_uploaded/MP3724_manual.pdf

seeing as allot of us have sagy packs that would perform well in a 24v high ah pack for solar i thought it would be worth sharing the idea and asking the question.

cos of the zombie apocalypse .. you know

You might be able to get away with this since the maximum and minimum voltages are adjustable on this charge controller. I would turn off the battery equalization feature in the dip switch settings. You will still have to balance charge your battery packs or at least check each cell with a volt meter every now and then. I'd check them more often than not since they're "retired" cells. It might also be a good idea to set the max voltage a little below the maximum of 25.2 volts for a 6s pack for a "safety margin" in case some of the cells get a little out of balance. Maybe try one volt less say at 24.2?

Like you say keep these outside your building, I'm not sure if a charge controller could "mess up" and forget to stop charging by accident since these devices are sitting there on all the time for months or even years at a time.