Outback MX problem [RE-wrenches]

[Matt Tritt]

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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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