If you factor in depth of discharge between lead acid and lithium chemistry , Lithium becomes far more cost effective in stationary large format .
If your running lead acid to a maximum of 80% discharge your 1000ah 48 volt pack (commonly used here in Aus) (and if looked after should last 15 years) is only 200ah in reality or about 8,000 watt hours in usable Ac in home after losses .
A lithium pack will live just as long at 80% discharge , so a 250 ah pack is giving you the same usable storage....
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