Fw: L-16 Battery Charging [RE-wrenches]

Allan Sindelar allan at positiveenergysolar.com
Wed Jan 23 16:17:01 PST 2002


Wrenches,
A further post on batteries from Tom Hund of Sandia, posted here as a
courtesy.
Allan @+E

----- Original Message -----
From: "Hund, Thomas" <tdhund at sandia.gov>


> Ray, & Everyone:
>
> My experience with L-16 water consumption in operational systems was that
> when new, my Trojan L-16s needed to be watered every 9-months and after
> about 3 to 4 years of use the water consumption increased to require
> watering every 2 to 3 months in my stand-alone solar home system. End of
> life occurred at 8 years (2900 cycles - 10 to 20% DOD). My temperature
> compensated PV regulation voltage was 2.45 vpc (14.7 V) with a weekly PV
> charge at 2.50 vpc (15.0 V). My specific gravity was consistently measured
> to be around 1.270. My operational capacity was measured at about 200 Ah
to
> about 1.9 vpc (11.4 V)over the life of the battery.
>
> The above Trojan L-16 did achieve its rated cycle-life with no cell
> problems. The only negative aspect of the battery was lower than expected
> capacity. Other systems using the US Battery L-16 including Nationwide
> Battery L-16s appear to have similar performance characteristics.
>
> Tom

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