Re: [RE-wrenches] Insolation calc anyone ;)

2018-11-23 Thread Ray 
Is it possible that there was a lightning strike nearby, and the light 
flash created the high max power readings?    I'm calculating almost 
1400 w/ m2, (3075/2205 x 1000 w/M2) which is high, but not insanely 
high.  They used to use flash testing to rate modules, so a fairly 
instantaneous flash can do it.


Ray Walters
Remote Solar
303 505-8760

On 11/21/18 11:10 PM, br...@willpowerelect.com wrote:

Compadres,

I have 4 identical arrays of 3 strings of 3 Solarworld SW 245 mono 
(2010 model) to FM80s. When designing, not exceeding 150 voc was 
critical. No record temp data available. Location ~ 4,000' Pacific 
Northwest. Recently replaced an FM80 with 6 blown FETs showing max 
power at 3075 watts! This from a 2205 watt array into a 24 volt 
battery. Max historical voc is ~120. My guess at record low temp is 
-10F. tc%/ºC MPP doesn't get anywhere close. What would the WM2 need 
to be in order to achieve 3075 watts on a 2205 watt array? BTW, 2 of 
the four original chargers are still working fine and one of them also 
shows 3075 watts max power. Edge of cloud effect against snow field at 
bottom of array?


Cheers,

Bruce Fiero-RMI

*
*
*"*/*Energizing the Rogue Valley"*/

4115 S Pacific Hwy
*Medford, OR 97501*
*
*
*P:* 541.535.3965
*F:* 541.512.0061
*E:* br...@willpowerelect.com 
*W:* Willpower Electric, LLC 

*CCB */191852/
*Oregon Electrical Contractor */C681/
**NABCEP*/**/*Certified Solar (PV) Installer *031409-38//*
*DUNS* /191470363/
*Energy Trust of Oregon Trade Ally */Solar (PV) Installation & Energy 
Efficient Commercial Lighting Programs /

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Re: [RE-wrenches] Insolation calc anyone ;)

2018-11-22 Thread jay 
HI Bruce,

OB specifies 2000 watts STC max for the FM-80 at 24v.  


Gotta say I've never measured 3X solar irradiance, impressive.

jay
peltz power

> On Nov 22, 2018, at 7:37 AM, Solar  wrote:
> 
> I live in Northern MN and we get very cold days (-50F +) and very crisp clear 
> days when it’s this cold. I’ve seen 1333 WM2 on the same plane as my array 
> with snow reflecting sun light. Using the daystar irradiance meter. I am at 
> 1400’ so your increased elevation with very cold temps, snow and edge of 
> cloud could maybe cause it. Maybe a calculation of extremes could give you an 
> idea. Rearrange the formula and get the irradiance needed to cause this high 
> of watts. 
> 
> Jesse Dahl
> 
> NABCEP PV Installation Professional
> IBEW Local 292 - Electrician 
> Electrical/Solar PV Instructor - HCC
> 
> Sent from my iPhone
> 
> On Nov 22, 2018, at 12:10 AM,  >  > wrote:
> 
>> Compadres,
>> 
>> I have 4 identical arrays of 3 strings of 3 Solarworld SW 245 mono (2010 
>> model) to FM80s. When designing, not exceeding 150 voc was critical. No 
>> record temp data available. Location ~ 4,000' Pacific Northwest. Recently 
>> replaced an FM80 with 6 blown FETs showing max power at 3075 watts! This 
>> from a 2205 watt array into a 24 volt battery. Max historical voc is ~120. 
>> My guess at record low temp is -10F. tc%/ºC MPP doesn't get anywhere close. 
>> What would the WM2 need to be in order to achieve 3075 watts on a 2205 watt 
>> array? BTW, 2 of the four original chargers are still working fine and one 
>> of them also shows 3075 watts max power. Edge of cloud effect against snow 
>> field at bottom of array?
>> 
>> Cheers,
>> 
>> Bruce Fiero-RMI
>> 
>> 
>> 
>> "Energizing the Rogue Valley"
>> 
>> 4115 S Pacific Hwy
>> Medford, OR 97501
>> 
>> P: 541.535.3965
>> F: 541.512.0061
>> E: br...@willpowerelect.com 
>> W: Willpower Electric, LLC  
>> 
>> CCB 191852
>> Oregon Electrical Contractor C681
>> NABCEP Certified Solar (PV) Installer 031409-38
>> DUNS 191470363 
>> Energy Trust of Oregon Trade Ally Solar (PV) Installation & Energy Efficient 
>> Commercial Lighting Programs  
>> 
>>  
>> **This email may contain information that is privileged, confidential, or 
>> otherwise exempt from disclosure under applicable law. If you are not the 
>> addressee, or if it appears that you have received this email in error, 
>> please advise me immediately by reply email, keep the contents confidential, 
>> and immediately delete the message and any attachments from your system. 
>> 
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Re: [RE-wrenches] Insolation calc anyone ;)

2018-11-22 Thread Jerry Shafer 
Bruce, Wrenches
Your case is interesting because everything was operating  and in place but
the range is tighter and only has 3 modules connected per string.
In Hawaii we recorded close to 3000 watts m2, during a commissioning of a
100 k Satcon inverter had 3 equal conbiners, with only one combiner on we
clipped the inverter at just over 100 KWAC on the display. Iradiance meter
went out of range. In northern California had over 2000 watts m2 and poped
the inverters with over volts. Edge of cloud, cold temps, higher elevations
can really be an issue for so called safe zone.
Jerry

On Nov 21, 2018 10:11 PM,  wrote:

Compadres,

I have 4 identical arrays of 3 strings of 3 Solarworld SW 245 mono (2010
model) to FM80s. When designing, not exceeding 150 voc was critical. No
record temp data available. Location ~ 4,000' Pacific Northwest. Recently
replaced an FM80 with 6 blown FETs showing max power at 3075 watts! This
from a 2205 watt array into a 24 volt battery. Max historical voc is ~120.
My guess at record low temp is -10F. tc%/ºC MPP doesn't get anywhere close.
What would the WM2 need to be in order to achieve 3075 watts on a 2205 watt
array? BTW, 2 of the four original chargers are still working fine and one
of them also shows 3075 watts max power. Edge of cloud effect against snow
field at bottom of array?

Cheers,

Bruce Fiero-RMI


*"**Energizing the Rogue Valley"*

4115 S Pacific Hwy
*Medford, OR 97501*

*P:* 541.535.3965
*F:* 541.512.0061
*E:* br...@willpowerelect.com
*W:* Willpower Electric, LLC 

*CCB **191852*
*Oregon Electrical Contractor **C681*
*NABCEP Certified Solar (PV) Installer 031409-38*
*DUNS* *191470363*
*Energy Trust of Oregon Trade Ally **Solar (PV) Installation & Energy
Efficient Commercial Lighting Programs  *


***This email may contain information that is privileged, confidential, or
otherwise exempt from disclosure under applicable law. If you are not the
addressee, or if it appears that you have received this email in error,
please advise me immediately by reply email, keep the contents
confidential, and immediately delete the message and any attachments from
your system. *

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Re: [RE-wrenches] Insolation calc anyone ;)

2018-11-22 Thread Solar 
I live in Northern MN and we get very cold days (-50F +) and very crisp clear 
days when it’s this cold. I’ve seen 1333 WM2 on the same plane as my array with 
snow reflecting sun light. Using the daystar irradiance meter. I am at 1400’ so 
your increased elevation with very cold temps, snow and edge of cloud could 
maybe cause it. Maybe a calculation of extremes could give you an idea. 
Rearrange the formula and get the irradiance needed to cause this high of 
watts. 

Jesse Dahl

NABCEP PV Installation Professional
IBEW Local 292 - Electrician 
Electrical/Solar PV Instructor - HCC

Sent from my iPhone

> On Nov 22, 2018, at 12:10 AM,  
>  wrote:
> 
> Compadres,
> 
> I have 4 identical arrays of 3 strings of 3 Solarworld SW 245 mono (2010 
> model) to FM80s. When designing, not exceeding 150 voc was critical. No 
> record temp data available. Location ~ 4,000' Pacific Northwest. Recently 
> replaced an FM80 with 6 blown FETs showing max power at 3075 watts! This from 
> a 2205 watt array into a 24 volt battery. Max historical voc is ~120. My 
> guess at record low temp is -10F. tc%/ºC MPP doesn't get anywhere close. What 
> would the WM2 need to be in order to achieve 3075 watts on a 2205 watt array? 
> BTW, 2 of the four original chargers are still working fine and one of them 
> also shows 3075 watts max power. Edge of cloud effect against snow field at 
> bottom of array?
> 
> Cheers,
> 
> Bruce Fiero-RMI
> 
> 
> 
> "Energizing the Rogue Valley"
> 
> 4115 S Pacific Hwy
> Medford, OR 97501
> 
> P: 541.535.3965
> F: 541.512.0061
> E: br...@willpowerelect.com
> W: Willpower Electric, LLC 
> 
> CCB 191852
> Oregon Electrical Contractor C681
> NABCEP Certified Solar (PV) Installer 031409-38
> DUNS 191470363 
> Energy Trust of Oregon Trade Ally Solar (PV) Installation & Energy Efficient 
> Commercial Lighting Programs  
> 
>  
> **This email may contain information that is privileged, confidential, or 
> otherwise exempt from disclosure under applicable law. If you are not the 
> addressee, or if it appears that you have received this email in error, 
> please advise me immediately by reply email, keep the contents confidential, 
> and immediately delete the message and any attachments from your system. 
> 
> ___
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