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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. <br><br>
At 08:44 PM 9/11/2018, you wrote:<br>
<blockquote type=cite class=cite cite="">Hello wrenches,<br><br>
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.<br><br>
The system was dual stack Outback VFXR-3524A inverters (to be precise one
was a sealed unit). The set-points were as follows:<br>
Absorb Voltage was 29.8V<br>
Absorb Time was 6.0 hours<br>
Float Voltage was 27.0V<br>
Rebulk Voltage was 27.0V<br>
End Amps was 0A<br><br>
These settings extended similarly to 2 x FM80 charge
controllers.<br><br>
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!<br><br>
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. <br><br>
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.<br><br>
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.<br><br>
Thanks in advance<br><br>
<br><br>
-- <br><br>
<font color="#305A78"><br>
</font><br>
Mac Lewis<br><br>
<font face="Verdana"><b>"Yo solo sé que no sé nada."
-Sócrates<br>
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