There has not been anyone from SMA-America on this list since John Berdner left.
I welcome hearing from any more manus for participation, each is allowed one person that is technically proficient in their products.
FYI, here are the manu representatives on the list that I am aware of:
Apollo Solar - Herb Flynn
Enphase - Marv Dargatz
Trojan - Ronald Paredes
OutBack - Christopher Freitas
Direct Power - Dan Duffield
Morningstar - William Mellema
Xantrex - Mark Edmunds
Sharp - John Hardwick
Blue Sky - Rick Cullen
Northwest Energy Storage - Rob Shappell
Surrette - James Surrette
Wiley Electronics - Brian Wiley
Midnite Solar - boB Gudgel
Unirac - Chris Meier
Magnum Energy - Brian Faley
PV Powered - Brian Thomas
Mark Frye wrote at 09:58 AM 10/20/2009:
Is there an SMA rep on this forum that can give us more detail on the SunnyIsland/SunnyBoy AC coupled control loop?
I thought that the frequency is altered by the SunnyIsland to trip a fault in the SunnyBoy, but the SunnyBoy is reporgrammed to override the 5 minute reset so that you had basic on/off control. If so, is this dymanic enought to provide PWM of the output of the SunnyBoy? Is the mechanism something other than above?
Mark Frye
Berkeley Solar Electric Systems
303 Redbud Way
Nevada City, CA 95959
(530) 401-8024
www.berkeleysolar.com
From: [email protected] [ mailto:[email protected]] On Behalf Of Jeff Yago
Sent: Tuesday, October 20, 2009 9:52 AM
To: RE-wrenches
Subject: Re: [RE-wrenches] AC Coupled Re-visited
it is my understanding that the Sunny Island coupled with Sunny Boys is able to taper charge in an AC coupled system as the 2 inverters are able to communicate with each other and the Sunny Island alters the frequency input of the Sunny Boys and lowers the total output of the Sunny Boys to match the needs of the battery bank
Kirpal Khalsa
-------------------------------------------------------------------------------------------------------------------------------------------------
Yes, if we use a Sunny Island AC coupled with a SunnyBoy we would not have the battery charging problem, but remember, the SunnyBoy is 240 VAC and the Sunny Island is 120VAC which I also find is just has expensive to match up by having to install an external step-down transformer so I still feel inverter manufacturers are missing an opportunity to provide a needed product feature that nobody is providing. .
Jeff Yago
DTI Solar
Netscape. Just the Net You Need.
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