Outback MX problem [RE-wrenches]

[Blair May]

Lota lead for the input! That being said I too charge acording to
Surrette's suggested Charge V rate. OB MXs DO screw up so I too would
jump at the chance to swap. Who knows, if they want to swap maybe they
will pay you for the trouble. Try to get them to send you a new one and
see what happens when you get to the site. Ck for loose wires in the CC.

-----Original Message-----
From: Matt Tritt [mailto:solarone at charter.net] 
Sent: Wednesday, May 28, 2008 3:43 PM
To: RE-wrenches at topica.com
Subject: Re: Outback MX problem [RE-wrenches]



Ron,

Since the MX thinks that the batteries are virtually full all the time, 
"force bulk" is simply overriding the controller programming to effect a

charge, I would take OutBack up on the offer and call it good. I'm 
curious as to why you have the bulk point set so high?

Matt T

Ron Young wrote:

>
> I'm having a problem with an Outback MX going into sleep mode and
> showing incorrect voltage on the input. It's a single 3524 inverter  
> with a 4KS25 Surrette battery charged by a Whisper 100 and a 680 watt

> array (Evergreen 170's) wired in two strings for 48v. The only time  
> the MX will charge is if a charge is initiated via FORCE BULK mode or

> if the customer turns on her vacuum cleaner and it draws down the  
> batt. voltage then the MX kicks in. She says she sees the pv output  
> voltage drop from 70 (sunny day) to as low as 24 then start building  
> up again. If it stays around 60 then the MX keeps charging but once  
> it gets back up to 70 then MX cuts out. Bulk set point is at 29.4.
>
> Actual battery voltage measured at the terminals is 25.1 today but
> the MX says 29.1.
>
> Outback wants to replace the unit but I'm not convinced yet that it's
> defective, just wondering if maybe something else is going on that  
> I've overlooked. The above behaviour is the same whether there is  
> wind or no wind so I've ruled out a conflict with the Whisper  
> controller.
>
> Ron Young
>
>
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