PzS vs OPzS for off grid systems
I've seen that almost everyone recommends the OPzS as the best choice for an off grid application (taking into account the 20 yrs life claimed by most of the manufacturers).
Anyway, looking at the detailed specifications, the OPzS has a 20 years life span in float operation and its electrolyte has a lower density (1.24 vs 1.29) in regard to PzS version.
Moreover, the OPzS are recommended for backup applications (UPS/telecomm), where the battery is actually spending the most part of its life in float operation. That means the electrolyte concentration will stay high for a very long time hence there is an increased chance of plate corrosion (that's why they choose that lower (1.24) electrolyte density).
Well, the float operation it's not exactly an off-grid/solar scenario, where you have to cycle the battery on daily basis. For that matter, this scenario is closer to a forklift/golfcart operation (though the discharge current is usually lower).
So, why should I choose OPzS instead of Pzs? The transparent case it's not the answer..
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