[RE-wrenches] Trojan L16RE-2V set-points

[Drake]

I agree with the comments that followed on this 
thread, and would also like to add that Trojan 
L-16 batteries have a high rate of premature 
failure. Possibly the 2 V cells are better, but 
the 6 V cells seem very prone to dying early. 
Trojan batteries were robust in past decades, but 
seem exceedingly fragile now.

At 08:44 PM 9/11/2018, you wrote:
>Hello wrenches,
>
>I inspected a system that another company had 
>installed.  It had single string of 12 x Trojan 
>L16RE-2V batteries about 2 years old.  They had 
>experienced a battery melt-down.  It looks as 
>though the meltdown had occurred internally, not from a bad connection.
>
>The system was dual stack Outback VFXR-3524A 
>inverters (to be precise one was a sealed 
>unit).  The set-points were as follows:
>Absorb Voltage was 29.8V
>Absorb Time was 6.0 hours
>Float Voltage was 27.0V
>Rebulk Voltage was 27.0V
>End Amps was 0A
>
>These settings extended similarly to 2 x FM80 charge controllers.
>
>I was able to jumper the melted battery and get 
>her power in 15 minutes.  Her installer had 
>left her without power for 2 weeks.  My clients will kill me if that happened!
>
>Anyway, I believe these set-points are way out 
>of whack and too aggressive.  The voltage is OK 
>(Trojan recommends ~29.6V for this) but the 
>Absorb time seems way too long, Rebulk is too 
>high and end amps isn't helping.  However, Im 
>not finding a definitive article from Trojan 
>that describes typical Absorb times or even how 
>to adjust towards a good Absorb Time, based on 
>specific gravity measurements or amperage absorption. Â
>
>My diagnosis is that these batteries have been 
>cooked over the past 2 years.  In the 
>electrolyte, there is noticeable 
>"floaties".  The client said that the original 
>installer had accused her of not using distilled 
>water, but I don't believe that would cause her 
>symptoms.  I believe the floaties are plate material.
>
>I'd be interested in wrenches opinions familiar 
>with these batteries if these are appropriate 
>settings for a low energy user.  I will attempt 
>to get through to Trojan as well.
>
>Thanks in advance
>
>
>
>--
>
>
>
>Mac Lewis
>
>"Yo solo sé que no sé nada." -Sócrates
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