[RE-wrenches] Abysmally low production from FLEXpowerTWO GVFX3648 system

[Chris Mason]

It has to be between the strings and the charge controller, so measure the
current on each string in full sun. That will isolate which is not
performing. Also, look at your DC output in full sun, your MX80 should show
the KWp and it should match or exceed your system wattage.

On Sun, Apr 8, 2012 at 10:43 PM, Bob Clark <bclark at solar-wind.us> wrote:

> Dear Wrenches:****
>
> ** **
>
> What am I not seeing with this situation?****
>
> ** **
>
> Only 133 DCkWH (120 ACkWH) during mid-December through April 6 (at least
> that is what the mate and the MX80 CC say).  PVWATTS predicted ~600 ACkWH.
>
> Here are the major components of the system:****
>
> ** **
>
> 24 - Silicon Energy 190W solar modules in 8 series of 3 modules for 4560W
> nominal****
>
> 1 - Midnite Solar, Combiner box, MNPV12 with 8 circuit breakers (one for
> each string)****
>
> 1 - MX80 charge controller****
>
> 16 - Concorde SunXtender Sealed AGM Battery, 6V, 405Ah, L16, PVX-4050HT (2
> parallel series of 8 batteries for 48V and 810 AH)****
>
> 1 - Outback FlexNet DC System Monitor, FN-DC****
>
> 2 - GVFX3648 inverters****
>
> 1 - Mate2****
>
> 1 - HUB10****
>
> 1 - Remote Temperature Sensor****
>
> ** **
>
> The insolation this winter has been, if anything, more than usual.  The
> electrical usage noted on the utility bill was approximately 170 ACkWH more
> than the same winter period last winter.  No appreciable change in usage
> pattern this winter compared to last winter (in fact, if anything, there
> has been less use this winter).  Everything appears to be functioning
> (normally, I think).****
>
> ** **
>
> What is going on?  It cannot just be a malfunctioning utility meter.  It
> seems to me that regardless of the functionality of the utility meter, the
> Mate and the MX80 should show greater production.****
>
> ** **
>
> What is being overlooked?****
>
> ** **
>
> Thanks for your help.****
>
> ** **
>
> *Bob Clark*
>
> *SolarWind Energy Systems, LLC*
>
> * (509) 826-1259*
>
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-- 
Chris Mason
President, Comet Systems Ltd
masonc at cometsystems.co
www.cometsystems.co
Cell: 264.235.5670
Int: +1305.767.2094
Skype: netconcepts
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