[RE-wrenches] Fronius replacement

[Gary Willett]

JESSE:

The Power-One specs lists 160V to 530V as the MPPT working range. It's 
possible to set the per MPPT input as low as 120VDC. Power-One does not 
provide info for loss of efficiency if the high-temp DC in[put voltage 
drops below 160V.

Do you have any info on performance degradation between 120V and 160V?

Regards,


Gary Willett, PE


On 8/28/2012 11:31 AM, mac Lewis wrote:
> Power One Inverters will easily string that low.  We have used quite a 
> few of these with no problem.  They are ungrounded on the DC side.
>
> On Mon, Aug 27, 2012 at 3:22 PM, Jesse Dahl <dahlsolar at gmail.com 
> <mailto:dahlsolar at gmail.com>> wrote:
>
>     I think some Solectria inverters have a low number (115vdc). The
>     Solectrias I have worked with had a max DC voltage of 400vdc though.
>
>     Jesse
>
>     Sent from my iPhone
>
>     On Aug 27, 2012, at 4:13 PM, David Brearley
>     <david.brearley at solarprofessional.com
>     <mailto:david.brearley at solarprofessional.com>> wrote:
>
>>     Off the top of my head...Power-One?
>>
>>     You can download an Excel file with comprehensive string inverter
>>     specs here:
>>
>>     http://solarprofessional.com/webexclusive/
>>
>>
>>
>>     On Aug 27, 2012, at 4:06 PM, William Miller wrote:
>>
>>>     Friends:
>>>
>>>     We have a client that wants to divest of 8 Fronius LG-4500 LV
>>>     inverters.  They are experiencing a high number of failures.
>>>       The Fronius have an unusually low DC input window:  150 to 450
>>>     VDC.  This means the stringing will result in a lower voltages
>>>     than typically found and makes it difficult to substitute
>>>     inverters.  Does anyone know of any reliable inverter that will
>>>     work with string voltages in the low 200s?
>>>
>>>     Thanks in advance.
>>>
>>>     William Miller
>>>
>>>
>>>     Miller Solar
>>>     Voice :805-438-5600 <tel:805-438-5600>
>>>     email: william at millersolar.com <mailto:william at millersolar.com>
>>>     http://millersolar.com
>>>     License No. C-10-773985
>>>
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> -- 
>
>
>
> Mac Lewis
>
> *
>
> "Yo solo sé que no sé nada." -Sócrates
>
> *
>
>
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