Re: [RE-wrenches] Efficiency Curves of Fronius Inverters?

Mark and Jeff, To be clear, manufacturers do not supply the data. It is required to be tested by a Nationally Recognized Testing Laboratory (NRTL). Mark's message could be misconstrued as the data being something Fronius cooked up. On another note. Anyone notice Fronius inverters having tro

Re: [RE-wrenches] Efficiency Curves of Fronius Inverters?

Thanks Mark! Nice source I wasn't aware of! jc Jeff, Here is what they submitted to the California Energy Commision: http://www.gosolarcalifornia.ca.gov/equipment/inverter_tests/summaries/Fronius

Re: [RE-wrenches] Efficiency Curves of Fronius Inverters?

Title: Efficiency Curves of Fronius Inverters? Jeff, Try this.  http://www.gosolarcalifornia.org/equipment/inverter_tests/summaries/ Hope this helps. See Ya! Marv Enphase Energy 707 763-4784 x7016 Jeff Clearwater, Village Power Design wrote: Hey Folks, Anyone have or kn

Re: [RE-wrenches] Efficiency Curves of Fronius Inverters?

Jeff, Here is what they submitted to the California Energy Commision: http://www.gosolarcalifornia.ca.gov/equipment/inverter_tests/summaries/Froni us%20IG%204000.pdf Mark Frye Berkeley Solar Electric Systems 303 Redbud Way Nevada City, CA 95959 (530) 401-8024

[RE-wrenches] Efficiency Curves of Fronius Inverters?

Hey Folks, Anyone have or know where I can get my hands on the efficiency vs. wattage curve for the Fronius IG series (the old series - not the Plus). I have a 4000 in stock and wondering if I can apply it to a friend's 2660 watt system without losing much to efficiency at low power levels.

Re: [RE-wrenches] Kohler 8.5 RES

Alan, I'm sure that many on this list would have excellent input about what an off-grid generator should include. Hopefully you can impress upon Kohler that it will be well worth their while for them to ask the #1 group of professionals who will most likely be selling and/or installing these wh

Re: [RE-wrenches] "Ballasted" Ground Mount?

There are numerous options here: most ground mount manu's offer ballasted systems, I would look to them 1st. Other systems I've seen or used - 1) Pour a continuous surface "footer" that is large enough in size to provide the proper ballast for the uplift in your area, pour one along the S. edg

Re: [RE-wrenches] Kohler 8.5 RES

Hi, Jay, My info about the 8.5RES not being reconfigurable came from our Kohler distributor. When I read your message I called Kohler HQ to find out which is correct. The word back: I got this information from the resi team. The 8.5RES is configured for 120/240V. It is not configured for

[RE-wrenches] "Ballasted" Ground Mount?

Situation: ROCK - limestone ledge on cliff. Surface is relatively smooth with little to no grade in a 30' x 30' area. Basically a large slab of limestone about 4' thick. Question: Anyone have experience with some type of ballasted mount system for either fixed or tracked array in this type of env

Re: [RE-wrenches] Roof Loading request for help

I caught this thread a little late, but I have a hard number to be used in this discussion. We have worked with a umber of AHJs about the dead load of a PV system, and we routinely quote 2.6 lbs/sq-ft. This based on the actual module plus hardware weights for an array of four (4) BP Solar SX3200 mo

Re: [RE-wrenches] Kohler 8.5 RES

HI All, I just checked with my genny guy. He says that the new 8.5 are configureable for full power 120v and he has done this. thought you all should know, jay peltz power On Jul 6, 2009, at 9:16 AM, Drake Chamberlin wrote: Thanks to all who have helped with this. The moving target of

Re: [RE-wrenches] Roof Loading request for help

In a message dated 7/7/2009 5:26:25 P.M. Pacific Daylight Time, al...@positiveenergysolar.com writes: Specifically, are building authorities in other jurisdictions requiring structural engineering work for this type of roof attachment? Non of the jurisdictions in Central California r

Re: [RE-wrenches] Roof Loading request for help

Allan, In most of California (seismic zone 4) residential PV systems with solar arrays weighing less than 4 lb/ft2 do not require structural engineering if the roof has one layer of composition shingles. The reasoning is that roofs are allowed 2 layers of shingles (old set and re-roof set) and a

Re: [RE-wrenches] Roof Loading request for help

If we had a national solar installers association this would be the type of support we each would have to fight our own city halls. If we cannot provide these small county governments with our own "standard installation guidelines" to follow when making their new regulations, then they each w