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Author Topic: OPzS in comparison to Forklift and Rolls  (Read 1353 times)
magnus
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« on: March 21, 2011, 03:45:48 PM »

so, i did a search or two online and it looks like the OPzS batteries are really the best for off grid applications.

they last 15-20 years if kept float charged, compared to Rolls at 7-10 years.

forklift are great if second hand, but new cost more than OPzS.

any downside to OPzS?  other than cost, since shipping for me equalizes all the expenses.  the stationary vendors include shipping vs rolls vendors that add 300-400 for shipping.

comes out the same in the AmpHour to Euro ratio.

if they are designed for 80% discharge, although ideally kept at 40% discharge and above...than i should be able to get away with a smaller battery bank, 200Ah, 12 x 2
volt batteries to provide for washing machine at 800 watts and freezer surge.  Hydro always gives 600 watts to compensate.



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stephendv
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« Reply #1 on: March 21, 2011, 04:19:17 PM »

forklift are great if second hand, but new cost more than OPzS.

Are you sure (both from the same vendor)?  I found the exact opposite to be true.

any downside to OPzS?  other than cost, since shipping for me equalizes all the expenses.  the stationary vendors include shipping vs rolls vendors that add 300-400 for shipping.

comes out the same in the AmpHour to Euro ratio.

if they are designed for 80% discharge, although ideally kept at 40% discharge and above...than i should be able to get away with a smaller battery bank, 200Ah, 12 x 2
volt batteries to provide for washing machine at 800 watts and freezer surge.  Hydro always gives 600 watts to compensate.

Cycle life is directly related to the depth of discharge as per the attached graph.  Most people recommend 50% DoD as a good economic sweet spot between a battery that lasts a reasonable amount of time and is still affordable to buy.



* Screen shot 2011-03-21 at 17.15.21.png (18.31 KB, 428x285 - viewed 368 times.)
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