[RE-wrenches] Clipping

[Jesse Dahl]

Interesting. Jason you're in FLA right?  I'd like to hear from a northern installer who's put in a similar group of enphase.  That's exactly the type of info I'm looking for.  Like you mention, this might all be a waste if time when you consider module price.  I'm having a hard time getting modules under 250W now anyway...

Jesse  

Sent from my iPhone

On Mar 22, 2013, at 4:40 PM, Jason Szumlanski <jason at fafcosolar.com> wrote:

> We now have 230W, 235W, 240W, 245W, and 250W modules on Enphase M215's in the field. Initial anecdotal evidence shows that the 250W modules are doing better in our area, even when the cost comparison is taken into account (normalized for $/watt). I don't have a full year of data yet, but I plan to do a non-scientific analysis once I do. Of course, the "sweet spot" in any given year will be different. 
> 
> As with many things, the PV cost as a percentage of total installed price is making this quandry less important. Go BIG is becoming the safe bet when it's a minimal cost comparison.
> 
> Jason Szumlanski 
> Fafco Solar
> 
> On Fri, Mar 22, 2013 at 5:23 PM, Jesse Dahl <dahlsolar at gmail.com> wrote:
>> Understood. I guess the point/question was, a 250W module with a 215W micro would "flat top" a heck of a lot of power where I live during the 6 months of winter we have. I've sized my system to account for increased production during this time. I guess it comes down to sizing. I find it hard to do the 250W to 215W systems seeing what my system does on a regular basis. I'd like to see hard numbers from an enphase system showing the gains on the knee of the curve compared to "flat topping". 
>> 
>> Jesse
>> 
>> Sent from my iPhone
>> 
>> On Mar 22, 2013, at 1:11 AM, Nick Soleil <nsoleil at enphaseenergy.com> wrote:
>> 
>>> Hi Jesse and Wrenches,
>>> 
>>> One thing that should be understood about the production readings from a DC optimizer system is that the module level readings are in DC.  That is the production before being converted to AC, and does not account for the losses of the inverter.  It isn't really an apples to apples comparison to equate that production reading to the 225watt max output of the Enphase M215.
>>> 
>>> 
>>> On Thu, Mar 21, 2013 at 8:24 PM, Jesse Dahl <dahlsolar at gmail.com> wrote:
>>>> Hello,
>>>> 
>>>> Marco's email about Power-1's micros reminded me to send this screen shot.
>>>> 
>>>> This is from my system at home.  It consists of 9 210W Kyocera modules, Tigo optimizers and a 2kW PV Powered inverter.  It was very cold and clear on this day, but every sunny day this winter I've seen numbers similar to this at some point each day. I was trying to keep track of the amount of power over the STC rating of the modules, but its getting to be a huge project. I have hours each day that produce over the 210W.
>>>> 
>>>> 
>>>> Here is the link to my system. It shows each modules temp, Vdc, Adc and power.   I don't have the irradiance meter because of cost.
>>>> 
>>>> http://www.tigoenergy.com/site.php?181428c8-1402
>>>> 
>>>> Jesse
>>>> 
>>>> 
>>>> 
>>>> 
>>>> 
>>>> Sent from my iPhone
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>>> 
>>> -- 
>>> Cordially,
>>> Nick Soleil
>>> Field Applications Engineer
>>> Enphase Energy
>>> Mobile: (707) 321-2937
>>> 
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>>> 
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