[RE-wrenches] Sanyo Semi-facial

[Geoff Greenfield]

My understanding of amorphous is that there is a 2-3 week burn in of higher performance, then it levels off. The rated watts reflect the levelized performance. 

Re overstacking an inverter:  the sma report from their sizing tool is useful- balancing best value, long term performance and inverter reliability is an artform more than science. Adding modules that perform at spec when we are used to a larger derate makes it that much trickier.  

For a brighter energy future,

Geoff Greenfield
President
Third Sun Solar & Wind Power Ltd.
340 West State Street, Unit 25
Athens, OH 45701

740.597.3111     Fax 740.597.1548
www.Third-Sun.com

Clean Energy - Expertly Installed






----- Darryl Thayer <daryl_solar at yahoo.com> wrote:
> 
> hi all
> 1) I have a 97kW system that just hit 95kW peak, which surprised me.  
> 2) Overloading the inverter, I was told that slight over load is OK and that if you overload up to 25% you will not have any significant annual loss.  If this is not correct please up date me.
> DT
> 
> 
> --- On Tue, 4/14/09, Bill Brooks <billbrooks7 at yahoo.com> wrote:
> 
> > From: Bill Brooks <billbrooks7 at yahoo.com>
> > Subject: Re: [RE-wrenches] Sanyo Semi-facial
> > To: "'RE-wrenches'" <re-wrenches at lists.re-wrenches.org>
> > Date: Tuesday, April 14, 2009, 8:54 PM
> > Doug,
> > 
> > That is why I made the comment that their panels tend to be
> > underrated (a
> > good and rare thing). One of the reasons is due to the
> > article that Joel
> > posted a link to earlier (the Japanese govt. hammered them
> > for overrating).
> > The product has not been on the market (or even in
> > existence) long enough to
> > know whether or not it has a major drop off in power down
> > the road. However,
> > it is a large, reputable company, so the risk of buying
> > their product is
> > dramatically less than many other new-style technologies
> > coming to the
> > market. If their product fails, you are likely to be taken
> > care of. That is
> > a lot more than you can say for the majority of newcomers
> > to our industry.
> > 
> > Bill.
> > 
> > 
> > -----Original Message-----
> > From: re-wrenches-bounces at lists.re-wrenches.org
> > [mailto:re-wrenches-bounces at lists.re-wrenches.org] On
> > Behalf Of Doug Wells
> > Sent: Tuesday, April 14, 2009 5:58 PM
> > To: RE-wrenches at lists.re-wrenches.org
> > Subject: Re: [RE-wrenches] Sanyo Bi-facial
> > 
> > Bill,
> > 
> > I am not going to go off about Sanyo modules, especially
> > the bifacial  
> > brand.  However I will say this.
> > I have installed a lot of residential systems with their
> > panels.  I  
> > installed a system at a retired engineers home last summer
> > and he is  
> > keeping very close records of production.  We are commonly
> > seeing  
> > production which is at or above nameplate rating ON THE AC
> > SIDE.  A  
> > 3.6 kW array is producing 3400 to 4,000 watts AC on cold
> > sunny days.   
> > This is not the norm in PV production in my opinion.
> > This brings up 2 questions for me
> > 	1.  Why the hell are very intelligent engineers
> > overloading
> > inverters  
> > with DC production.  I know the easy answer is Nameplate DC
> > rating for  
> > incentive programs.
> > 	2.  Is the multi-junction Amorphous approach all pumped up
> > the first
> > 
> > 5 years and then going to let go in year 18?
> > 
> > Thoughts experience?  Can't deny the early production
> > in VT.
> > 
> > Doug Wells
> > The Solar Specialists
> > Morrisville, VT 05661
> > (p) 802-223-7014
> > (c) 802-498-5856
> > www.thesolarspecialists.com
> > 
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