[RE-wrenches] Sanyo Semi-facial

[Darryl Thayer]

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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