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

[Ray Walters]

Very interesting, I too had very similar results with a set of DEKA L-16s.
I thought it was my less than laboratory testing methods. 200 AH when it is
rated at 360 AH? Anybody besides Tom & I seen L16s doing this? 

The almost exponential increase in water use left me with some dry plates a
few months back, after very predictable water consumption for almost 5
years.( I know, I'm replacing the set)

Also, thanks Alan for forwarding these messages. Maybe Tom should be on the
list?

Ray


>
>----- 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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