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_so...@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 <billbroo...@yahoo.com> wrote: > > > From: Bill Brooks <billbroo...@yahoo.com> > > Subject: Re: [RE-wrenches] Sanyo Semi-facial > > To: "'RE-wrenches'" <re-wrenches@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-boun...@lists.re-wrenches.org > > [mailto:re-wrenches-boun...@lists.re-wrenches.org] On > > Behalf Of Doug Wells > > Sent: Tuesday, April 14, 2009 5:58 PM > > To: RE-wrenches@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 > > > > _______________________________________________ > > List sponsored by Home Power magazine > > > > List Address: RE-wrenches@lists.re-wrenches.org > > > > Options & settings: > > http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org > > > > List-Archive: > > http://lists.re-wrenches.org/pipermail/re-wrenches-re-wrenches.org > > > > List rules & etiquette: > > www.re-wrenches.org/etiquette.htm > > > > Check out participant bios: > > www.members.re-wrenches.org > > > > _______________________________________________ > List sponsored by Home Power magazine > > List Address: RE-wrenches@lists.re-wrenches.org > > Options & settings: > http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org > > List-Archive: > http://lists.re-wrenches.org/pipermail/re-wrenches-re-wrenches.org > > List rules & etiquette: > www.re-wrenches.org/etiquette.htm > > Check out participant bios: > www.members.re-wrenches.org > _______________________________________________ List sponsored by Home Power magazine List Address: RE-wrenches@lists.re-wrenches.org Options & settings: http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org List-Archive: http://lists.re-wrenches.org/pipermail/re-wrenches-re-wrenches.org List rules & etiquette: www.re-wrenches.org/etiquette.htm Check out participant bios: www.members.re-wrenches.org
