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

[Jay]

Hi Mac

Here is the Trojan info you need

https://www.trojanbattery.com/pdf/TrojanBattery_UsersGuide.pdf

Looks like 4 hrs max absorb and 29.4v and that could be a bit long depending on how much solar, size of the generator and how they use the batteries

Usually the set points are at factory default!

Jay

Peltz power. 





> On Sep 11, 2018, at 5:44 PM, Mac Lewis <maclewis1 at gmail.com> 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.  
> 
> 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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