[RE-wrenches] Using legacy modules on micro-inverters

[Nick Soleil]

Hi Wiliam,

The max voltage rating of the M250 is 48V.   When you ran the compatibility
checker, did you use 154mv/°C?  You can either input the mV/°C or the
%/°C.  You will need to be sure that you convert the 0.154 to 154mV.


On Mon, Sep 30, 2013 at 12:24 PM, William Miller <william at millersolar.com>wrote:

> Nick:****
>
> ** **
>
> What is the upper voltage limit for the M250?  What happens when that
> voltage is exceeded?****
>
> ** **
>
> I am trying to use Siemens SP75 modules (two in series) and Shell
> SQ-150-PC. Below are the specs.  Note that two SP75s in series, if you
> multiply the voltages by two, is identical to the SQ-150 except for the
> temperature compensation.  I am not sure what to do with the temperature
> compensation value if I put two SP175s insereis.  Do you know?****
>
> ** **
>
> ** **
>
> *Qty*
>
> *Watts*
>
> *Ext*
>
> *Watts*
>
> *Pmax*
>
> *Vpmax*
>
> *Ipmax*
>
> *Isc*
>
> *Voc*
>
> *Temp Coefficient of Voc*
>
> Siemens PC4JF (Same as the SP75?)****
>
> 12****
>
> 75****
>
> 900****
>
> 75****
>
> 75****
>
> 17****
>
> 4.4****
>
> 4.8****
>
> 21.7****
>
> -0.077****
>
> Shell SQ-150****
>
> 3****
>
> 150****
>
> 450****
>
> 150****
>
> 150****
>
> 34****
>
> 4.4****
>
> 4.8****
>
> 43.4****
>
> -0.161****
>
> ** **
>
> Our record low is -10 C and average high is 38C.****
>
> ** **
>
> If I enter the data for the Shell, the calculator shows they are
> compatible with the M250.  Entering the data for two SP75s using -0.077 for
> Temp Comp (SP75) the tool says not.  If I use double (-0.154), then the two
> SP75s are compatible.  What is your determination?****
>
> ** **
>
> Thanks,****
>
> ** **
>
> William****
>
> ** **
>
> ** **
>
> ** **
>
> *From:* re-wrenches-bounces at lists.re-wrenches.org [mailto:
> re-wrenches-bounces at lists.re-wrenches.org] *On Behalf Of *Nick Soleil
> *Sent:* Monday, September 30, 2013 9:56 AM
> *To:* RE-wrenches
> *Subject:* Re: [RE-wrenches] Using legacy modules on micro-inverters****
>
> ** **
>
> Hi wrenches,****
>
> The M250 is not limited to 60 cell modules only.  The M250 has an expanded
> voltage window which will allow for it to be paired with a wider range of
> modules.  Enphase has an online module compatibility calculator which can
> be used for checking a specific pairing in a specific location, at:
>
>  http://enphase.com/module-compatibility-calculator-m250-update/.  ****
>
> Keep in mind that many of the high efficiency, higher voltage, 72 cell
> modules will not be compatible.****
>
> ** **
>
> ** **
>
> On Sat, Sep 28, 2013 at 6:45 AM, Jay Peltz <jay at asis.com> wrote:****
>
> Hi Bill****
>
> ** **
>
> Is there a new M250?****
>
> Enphase shows the 250 at 48vdc max and states 60 cell only modules. ****
>
> ** **
>
> That would be nice if it did both****
>
> ** **
>
> Jay****
>
> ** **
>
> Peltz power. ****
>
> ** **
>
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-- 

Cordially,

*Nick Soleil*

*Field Applications Engineer
*

*Enphase Energy*

Mobile: (707) 321-2937


**

*Enphase Commercial Solar.*
*Limitless.*<http://www.enphase.com/commercial?utm_source=email&utm_medium=sig&utm_campaign=Comm2012>

*
*<http://www.enphase.com/commercial?utm_source=email&utm_medium=sig&utm_campaign=Comm2012>

1420 North McDowell

Petaluma, CA 94954

www.enphase.com <http://www.enphaseenergy.com/>

P: (707) 763-4784 x7267

F: (707) 763-0784

E: nsoleil at enphaseenergy.com

[image: nabcep logo] Certified Solar PV Installer #03262011-300

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