<html><head></head><body style="word-wrap: break-word; -webkit-nbsp-mode: space; -webkit-line-break: after-white-space; ">Solarfest in Taos had a solar powered stage for years, so it definitely can be done. I've been into sound stuff lately, and I can say the loads are extremely variable.<div>I have a 600 watt rated amp, (class D design) that I peaked at 270 watts input and averaged about 150 watts while I was testing with a very low frequency signal.</div><div>I used a Kill-a-watt meter for the test, and the amp's clip light came on. </div><div>I also tested a class A amp (much less efficient) but I found the same thing: I never could get the input watts even to half the rated output of the amp.</div><div>No load draw was about 20 watts.</div><div><br></div><div>I'd start at having enough inverter surge power to meet all the amps cont. rated output. You'll also want enough battery to hit the surges on the bass notes. (pretend its a well pump)</div><div>Car audio guys know that more battery = more boom.</div><div>You should be able to get some idea of the loads from the generator size that worked before, also.</div><div>Find out how many bands will play each day, and approx how long their sets will be to get KwH/ day.</div><div><br></div><div>Sinewave is mandatory, although the Taos Solarfest used a pair of Trace SW4024s as I recall.</div><div>The rest of the system was 8 L16s, an 8000 watt generator, and about 1000 watt array (again based on my foggy memory)</div><div>This wasn't for the main stage, but a secondary stage that worked well for maybe 5000 people.(their bass was a bit wimpy though. Might want to go with more battery)</div><div>I also recall that this was a trailer mounted rental unit from Sacred Power in Albuquerque, so they may consider some kind of leasing/ rent to own arrangement.</div><div><br><div>
<span class="Apple-style-span" style="border-collapse: separate; border-spacing: 0px 0px; color: rgb(0, 0, 0); font-family: Helvetica; font-size: 12px; font-style: normal; font-variant: normal; font-weight: normal; letter-spacing: normal; line-height: normal; text-align: auto; -khtml-text-decorations-in-effect: none; text-indent: 0px; -apple-text-size-adjust: auto; text-transform: none; orphans: 2; white-space: normal; widows: 2; word-spacing: 0px; "><div>R. Walters</div><div><a href="mailto:ray@solarray.com">ray@solarray.com</a></div><div>Solar Engineer</div><div><br class="khtml-block-placeholder"></div><div><br class="khtml-block-placeholder"></div><br class="Apple-interchange-newline"></span>
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<br><div><div>On Apr 27, 2011, at 5:15 PM, boB Gudgel wrote:</div><br class="Apple-interchange-newline"><blockquote type="cite">
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On 4/27/2011 3:51 PM, benn kilburn wrote:
<blockquote cite="mid:COL121-W470AAF6D285F9DF2ED739AAD980@phx.gbl" type="cite">
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Wrenches,
<div>I have been asked about sizing PV systems for a couple
different music festivals that have been run solely off of
generators in the past. The problem i'm having is determining
the energy consumption of music/stage (amps, speakers, lights,
etc...?) loads as well as concession. The organizers have never
considered the kwh of electricity used and it has never been
metered. I believe the attendance of one festival is expected
to be in the range of 5000 and the other closer to 15000 over
the course of a weekend.</div>
<div><br>
</div>
<div>Do any of you have any experiences in this area? How were
the loads determined?</div>
<div><br>
</div>
<div>No doubt that generator back-up will still be needed, to what
extent, will be determined. So what we're looking at would be a
temporary off-grid PV system with generator back-up...</div>
<div><br>
</div>
<div>Any suggestions on how to proceed with this one?</div>
<div><br>
</div>
<div>benn<br>
</div>
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<br>
<br>
You might want to check the guys out from this article from a year
or two ago.<br>
I think it's just the kind of thing you're looking for.<br>
<br>
<br>
<a class="moz-txt-link-freetext" href="http://www.prosoundweb.com/photos/category/C17/">http://www.prosoundweb.com/photos/category/C17/</a><br>
<br>
<br>
Four (4) pacific northwest companies made some of the products for
this tour including the mixer board.<br>
<br>
boB<br>
<br>
<br>
<br>
<br>
<br>
<blockquote cite="mid:COL121-W470AAF6D285F9DF2ED739AAD980@phx.gbl" type="cite">
<div><br>
<span class="ecxecxecxecxEC_Apple-style-span" style="color:
rgb(0, 32, 96);"><font class="ecxApple-style-span" face="'Franklin Gothic Medium'">DayStar Renewable Energy
Inc. </font></span>
<div>
<div><font class="ecxApple-style-span" face="'Franklin Gothic
Medium'"><a class="moz-txt-link-abbreviated" href="mailto:benn@daystarsolar.ca">benn@daystarsolar.ca</a></font></div>
<div><font class="ecxApple-style-span" face="'Franklin Gothic
Medium'">780-906-7807 </font></div>
<div><font class="ecxApple-style-span" face="'Franklin Gothic
Medium'">HAVE A SUNNY DAY
</font></div>
<div><br>
</div>
</div>
<br>
<br>
</div>
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