[RE-wrenches] Suspect MX 60

[Drake]

Hello Wrenches,

An MX 60 boiled a 24 volt bank of 4 Trojan L-16 batteries last 
summer. The batteries all checked out to be in good shape. It is not 
totally clear that the CC was not set to auto equalize, but the EQ 
voltage was only set at 31.0 V.

The battery bank has been replaced by 8 Full River L-16 AGM 
batteries. The parameters have all been reset for AGM with EQ 
disabled. The homeowners are concerned that the charge control may 
not work, and damage their new battery bank.

If there is a problem with the CC, it is very intermittent. Has 
anyone ever seen an intermittent MX 60?

Outback tech support says if we send it in they will update the 
firmware for $90, and do a 24 hour bench test. It appears that the 
firmware update will not do anything useful for this off grid system. 
There are no new boards available for this unit. I'm not sure if the 
bench test will show up an intermittent problem.

Has anyone had this situation before?  Would it be better to:
    * Replace the CC
    * Send the CC to Outback
    * Do nothing
Thank you,

Drake

Drake Chamberlin
Athens Electric LLC
OH License 44810
CO License 3773
NABCEP Certified Solar PV
740-448-7328
<http://athens-electric.com/>http://athens-electric.com/


-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://lists.re-wrenches.org/pipermail/re-wrenches-re-wrenches.org/attachments/20141118/0a4da2e2/attachment-0002.html>