Re: [RE-wrenches] Net AC kW Derate Factor for SunnyBoy/Sunny Island

Hi, knuckle-busters~ That's interesting information in the other thread about the actual solar throughput to grid with the Xantrex XW architecture. May I now poll the group to learn what percentage throughput is likely if the inverter stack is instead an AC coupled blend of SMA SunnyBoy/SunnyIsla

[RE-wrenches] Tight roof layout questions: edge walkway requirements & "small gap" hardware options

Hello, Team~ I'm laying out some Sanyo modules on paper. Twelve of them fit the roof with almost too much perfection: this would be difficult to install as it would fill the roof "edge to edge" in both directions. Are there consistent guidelines about the amount of roof edge which must remain uncl

Re: [RE-wrenches] Tight roof layout questions: edge walkway requirements & "small gap" hardware options

Hi Mick, To answer part of your post, the DPW Power Rail mid-clamps give you a 3/8" gap between modules, and the SnapNrack mids give you a 1/2" gap. I doubt if that will give you much of a walkway though Brian Teitelbaum AEE Solar From: re-wrenches-boun...@lists.re-wrenches.org [mailto:

Re: [RE-wrenches] Tight roof layout questions: edge walkway requirements & "small gap" hardware options

Most racking manufacturers have a minimum setback distance from the edges of a roof for wind loading. -Glenn Burt From: re-wrenches-boun...@lists.re-wrenches.org [mailto:re-wrenches-boun...@lists.re-wrenches.org] On Behalf Of Mick Abraham Sent: Wednesday, August 25, 2010 2:09 PM To: RE-wren

Re: [RE-wrenches] Tight roof layout questions: edge walkway requirements & "small gap" hardware options

Mick; I train both fire departments and PV installers across the USA on PV systems and firefighter safety. Covering the roof "edge to edge" as you say is a very slippery slope for you, as the system designer. It's not legal in many areas, where setbacks and access pathways for firefighters ar

Re: [RE-wrenches] Shell SM110-12P Pvs

Perhaps the inverter is too hot, and derating its power for temperature. Have you installed a fan (such as a SunnyFan on the heat sink, to help it cool. Nick Soleil Project Manager Advanced Alternative Energy Solutions, LLC PO Box 657 Petaluma, CA 94953 Cell: 707-321-2937 Office: 707-789-9537

Re: [RE-wrenches] Tight roof layout questions: edge walkway requirements & "small gap" hardware options

Dan, let me start by saying that I am not trying to attack you here and that I do appreciate the valuable and dangerous job that fire fighters have. However, this issue is of great concern to me when it comes to the majority of residential PV systems. Since this is a residential, trussed roof,

[RE-wrenches] Solar License Database

The Interstate Renewable Energy Council (IREC) created a Solar Licensing Database as a resource for policy makers, practitioners, consumers, and anyone else looking for solar licensing information in the U.S. The state-by-state information offers a handy comparison for reviewing the different

Re: [RE-wrenches] Tight roof layout questions: edge walkway requirements & "small gap" hardware options

Mick, here in California the fire department in the various agencies has the final say on clearances. There is a very clear cut standard in place for the state, but we have been successful a few times in getting allowances to vary due to various site conditions. A call to the local AHJ is the p

Re: [RE-wrenches] Tight roof layout questions: edge walkway requirements & "small gap" hardware options

Using the HIP Sanyos then the area is really more like a 1/2" after you get a fudge factor in there,~ 36' +/-for your 12 modules. Sanyo's HIPs are good modules,, they have addressed the hi temp issues. The only issue might be the cantilever from the mounting foot to edge of module on the rail

Re: [RE-wrenches] Tight roof layout questions: edge walkway requirements & "small gap" hardware options

Just to throw this into the discussion, maybe there can be exemptions written into ordinances stating that if technical issues (system sizing requirements) provide for less than sufficient setback, or walkway space, then maximum DC system voltage cannot exceed 50VDC. In other words use micro-inv

Re: [RE-wrenches] Tight roof layout questions: edge walkway requirements & "small gap" hardware options

MIck--We just did a similar project as you describe where the edge to edge clearance was critical---used Pro Solar rails and "tile tracs" the minimum gap between modules was more like three-eights inch, maybe less. Their tech support was excellent as well--and they seem to have mid and

Re: [RE-wrenches] Tight roof layout questions: edge walkway requirements & "small gap" hardware options

Brian; I think you laid out the challenges quite well. Keep firefighters safe, but don't pose unrealistic constraints on PV systems. You also mention "true accessibility" -- which is a big issue here. I learned on the first day of class in FF1 Academy from our FDNY instructor (a real hard-as

Re: [RE-wrenches] Tight roof layout questions: edge walkway requirements & "small gap" hardware options

Just to clarify what is and isn't law in California: the final draft guidelines developed and adopted by Cal Fireare guidelines, not law, unless the local fire/AHJ has adopted them or parts of them into local ordinances. I have hea