[RE-wrenches] Outback FNDC relay

2009-10-14 Thread Kent Osterberg
Has anyone besides me had problems using the relay in the Outback FNDC?  I've had three different customers report that their generators failed to turn off. -- Kent Osterberg Blue Mountain Solar, Inc. www.bluemountainsolar.com ___ List sponsored b

Re: [RE-wrenches] Outback FNDC relay, Flex Net Review

2009-10-14 Thread William Miller
Kent: From the Flex Net DC manual, page 16: "OutBack strongly recommends using the AGS function of the MATE to control a generator." I assume from your post, you are using the Auto mode to have the relay control a generator, a practice that the above quotation recommends against. This may

Re: [RE-wrenches] Outback FNDC relay, Flex Net Review

2009-10-14 Thread Kent Osterberg
William, In all of these systems, the Mate's AGS system is being used to control the FNDC's relay.  The Mate's AGS port has been selected so that it operates the FNDC's relay rather than using the Aux output on the inverter.  The FNDC is providing SOC info to the Mate, but isn't directly contr

Re: [RE-wrenches] Outback FNDC relay, Flex Net Review

2009-10-14 Thread William Miller
Kent: The manual is not clear as to how this is done. Have you considered using a relay in an FX inverter to activate the generator as is done in a system without the Flex Net? Interesting about the SMA claim, but until I hear otherwise, this is just a claim. William At 01:25 PM 10/14/

Re: [RE-wrenches] Rooftop wiring methods between multiple subarrays

2009-10-14 Thread Max Balchowsky
Bill, as you know, if the array is on a tilted roof (tile track bkts or fast jacks) and the array is monolithic, all the wires go directly from under the panels to the junction box ( I mis-spoke when I said Combiner box, I too don't see the need for combiner boxes on residential systems ).We go

[RE-wrenches] Rooftop wiring methods between multiple subarrays

2009-10-14 Thread Nick Vida
Max, I'm with Bill Brooks, among others on this one. You are risking more than you might want to realize by bonding with mini (hanger) straps. Without an excelent path to ground through you equipment ground touching all frames on your array, you are risking static charge that can attract ligh

[RE-wrenches] Wire Management--was RE: Rooftop wiring

2009-10-14 Thread Bill Brooks
Max, Is the Minerallac clamp really rated as a bonding device? I don’t think so. It may make an electrical connection, but I don’t think it is nearly as good as a ground bushing. It is also made of cad-plated steel and I don’t think it is as durable as EMT or a ground bushing with a cad plat

Re: [RE-wrenches] Outback FNDC relay, Flex Net Review

2009-10-14 Thread Tump
I have had issues w/ the FNDC I had to send it back for a reprogram I sent the mate back at the same time too. MOST important thing I learned is that the battery bank MUST be at a full SOC prior to connecting the FNDC otherwise you defiantly will have generator issues. Still having our low volt

Re: [RE-wrenches] Wire Management--was RE: Rooftop wiring

2009-10-14 Thread Max Balchowsky
You're right Bill, It's not and the best method is to have a uninterrupted bare copper in layin lugs at each rail then into the j-box. We always check the ground to see what we have as far as resistance. We built a lot of high rise electrical projects during the 80's and early 90's. Every now an

Re: [RE-wrenches] Wire Management--was RE: Rooftop wiring

2009-10-14 Thread R Ray Walters
On Oct 14, 2009, at 5:07 PM, Bill Brooks wrote: Of far more significance is the overall wire management of USE-2 conductors in the array. Structure suppliers still do a terrible job of providing an effective means of controlling and protecting conductors—this is nearly a decade after th

Re: [RE-wrenches] Wire Management--was RE: Rooftop wiring

2009-10-14 Thread William Miller
Bill: Hear, hear. I believe I have ranted about this before. Conduit was invented for this purpose, it just needs a trade size knock out to connect to. I think this is called a module J-box. William At 04:07 PM 10/14/2009, you wrote: Structure suppliers still do a terrible job of prov

[RE-wrenches] ASTM PV installation standards

2009-10-14 Thread Joel Davidson
Have any Wrenches seen ASTM's proposed standard for the installation of PV arrays on 3:12 or higher pitched roofs? Here are some excerpts: - mounting structure with at least 50% design load safety factor. - non-metallic (polymeric) array mounting materials UV resistant for no less than the life

Re: [RE-wrenches] ASTM PV installation standards

2009-10-14 Thread Matt Lafferty
Hi Joel, Is this part of the work being done on ASTM WK25362? If not, can you provide the reference and source? Thanks! Matt Lafferty ___ List sponsored by Home Power magazine List Address: RE-wrenches@lists.re-wrenches.org Options & settings: http:

Re: [RE-wrenches] Outback FNDC relay, Flex Net Review

2009-10-14 Thread jay peltz
Hi Tump, However the FNDC has both functions. % start and volt and time start. So even if the % gets off for some reason, the volt/time should, repeat, should start it. I have all but given up on the flexnet. I find for most customers its too complicated, and while it gives good informati