Yep- lighting can be a killer, especially if not LED. I have experience with mobile solar and stage power. Email me directly for more info. I can tell you that I just did an Earth Day concert (3 years running) with a mobile solar trailer for 3000 people and they did not make a Magnum 4048 groan. Admittedly, it is a small stage setup. It really depends on the event.
Stage people and performers love to tell you, "I need three 15A outlets and one 20A outlet," and then they draw a MAX of 5,000W and well under 10kwh for a 4 hour concert. They have no idea what they really need in terms of RE power. Hint: bring a big battery and big inverter- you'll be fine. Jason Szumlanski Fafco Solar On Apr 27, 2011, at 9:19 PM, "d...@foxfire-energy.com" <d...@foxfire-energy.com> wrote: > It's the lights that will get you. JB should chime in here soon, but as I > recall SF in Vt maxed at around 15-20kw for sound and in the neighborhood of > 50k for lights. > > > Dan Brown > Foxfire Energy Corp. > Renewable Energy Systems > (802)-483-2564 > www.Foxfire-Energy.com > NABCEP #092907-44 > > > -------- Original Message -------- > Subject: Re: [RE-wrenches] PV powered music festival > From: R Ray Walters <r...@solarray.com> > Date: Wed, April 27, 2011 9:04 pm > To: RE-wrenches <re-wrenches@lists.re-wrenches.org> > > 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. > 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. > I used a Kill-a-watt meter for the test, and the amp's clip light came on. > 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. > No load draw was about 20 watts. > > 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) > Car audio guys know that more battery = more boom. > You should be able to get some idea of the loads from the generator size that > worked before, also. > Find out how many bands will play each day, and approx how long their sets > will be to get KwH/ day. > > Sinewave is mandatory, although the Taos Solarfest used a pair of Trace > SW4024s as I recall. > The rest of the system was 8 L16s, an 8000 watt generator, and about 1000 > watt array (again based on my foggy memory) > 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) > 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. > > R. Walters > r...@solarray.com > Solar Engineer > > > > > On Apr 27, 2011, at 5:15 PM, boB Gudgel wrote: > >> On 4/27/2011 3:51 PM, benn kilburn wrote: >>> >>> Wrenches, >>> 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. >>> >>> Do any of you have any experiences in this area? How were the loads >>> determined? >>> >>> 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... >>> >>> Any suggestions on how to proceed with this one? >>> >>> benn >> >> >> You might want to check the guys out from this article from a year or two >> ago. >> I think it's just the kind of thing you're looking for. >> >> >> http://www.prosoundweb.com/photos/category/C17/ >> >> >> Four (4) pacific northwest companies made some of the products for this >> tour including the mixer board. >> >> boB >> >> >> >> >> >>> >>> DayStar Renewable Energy Inc. >>> b...@daystarsolar.ca >>> 780-906-7807 >>> HAVE A SUNNY DAY >>> >>> >>> >>> >>> _______________________________________________ >>> List sponsored by Home Power magazine >>> >>> List Address: RE-wrenches@lists.re-wrenches.org >>> >>> Options & settings: >>> http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org >>> >>> List-Archive: >>> http://lists.re-wrenches.org/pipermail/re-wrenches-re-wrenches.org >>> >>> List rules & etiquette: >>> www.re-wrenches.org/etiquette.htm >>> >>> Check out participant bios: >>> www.members.re-wrenches.org >>> >> >> _______________________________________________ >> List sponsored by Home Power magazine >> >> List Address: RE-wrenches@lists.re-wrenches.org >> >> Options & settings: >> http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org >> >> List-Archive: >> http://lists.re-wrenches.org/pipermail/re-wrenches-re-wrenches.org >> >> List rules & etiquette: >> www.re-wrenches.org/etiquette.htm >> >> Check out participant bios: >> www.members.re-wrenches.org >> > > _______________________________________________ > List sponsored by Home Power magazine > > List Address: RE-wrenches@lists.re-wrenches.org > > Options & settings: > http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org > > List-Archive: > http://lists.re-wrenches.org/pipermail/re-wrenches-re-wrenches.org > > List rules & etiquette: > www.re-wrenches.org/etiquette.htm > > Check out participant bios: > www.members.re-wrenches.org > > _______________________________________________ > List sponsored by Home Power magazine > > List Address: RE-wrenches@lists.re-wrenches.org > > Options & settings: > http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org > > List-Archive: > http://lists.re-wrenches.org/pipermail/re-wrenches-re-wrenches.org > > List rules & etiquette: > www.re-wrenches.org/etiquette.htm > > Check out participant bios: > www.members.re-wrenches.org >
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