Re: [RE-wrenches] low cost DAS systems
I think the big this here is Low cost? Maybe we should define the price range so we can get a better fell of the product range? Logan Chris, Locus Energy has a low cost, revenue grade system that will work with all inverters. We have several dozen deployed and they're working well. Customer needs to have a high speed internet connection. www.locusenergy.com http://www.locusenergy.com/ I've tried the TED and found it to be more of a toy than a serious contractor product, although it may meet some user's needs. The Locus system is more accurate and robust, with much greater data storage. Jeff Irish Hudson Valley Clean Energy From: re-wrenches-boun...@lists.re-wrenches.org [mailto:re-wrenches-boun...@lists.re-wrenches.org] On Behalf Of Marco Mangelsdorf Sent: Monday, April 12, 2010 1:12 PM To: ch...@solarandwindfx.com; 'RE-wrenches' Subject: Re: [RE-wrenches] low cost DAS systems Chris, I've had one of my guys research this same question a while ago and the conclusion was the as far as low-cost DAS systems, Fat Spaniel was the big winner, as in under $1,000 which includes a year's worth of monitoring. Cheers, marco Good Day Wrenches, I'm looking for suggestions for a low cost DAS system for home/small commercial use. It just seems to be such a useful basic tool to verify performance other than just the Kwh meter. I'd like to add this to all of our clients quotes and projects. Looking for the basics like module temperature and irradiance and it would be nice if it would tie into the existing inverters DAS like an Enphase, Fronius or SMA to name a few since they already have inverter and PV in/output information. Or is Fat Spaniel and Helitronics my only options otherwise? Thanks for the help ahead of time. Christopher Chris Schaefer's WHERE KNOWLEDGE EQUALS POWER INDEPENDENCE Specializing in Off-Grid Electricity for Remote Homes Grid-Tied Power for Residential and Commercial Sites Tel 585-229-2083 ~ Cell 585-748-1870 5115 South Hill Road Canandaigua New York 14424 www.solarandwindfx.com http://www.solarandwindfx.com/ ~ ch...@solarandwindfx.com No virus found in this incoming message. Checked by AVG - www.avg.com Version: 9.0.801 / Virus Database: 271.1.1/2805 - Release Date: 04/11/10 08:32:00 ___ 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
Re: [RE-wrenches] Inverter causing migraine?
Hi Ron I have been following this thread closely to see what people think about Migraines. As a Traumatic Brain Injury (TBI) survivor and Migraine sufferer I understand your employees pain! I love the long dictations of Other Reasons for the Migraine and talk of placebo effect. Migraines are no joke, and no fun. Triggers for Migraines can be many things, strong perfumes are a good one for me. But I will say that inverters are a trigger also. I have 3 different inverters in my power room. I do not have problems with the Magnum or Outbacks, But the new Bergey 10Kw inverter will set me off when it is running at a specific power level with me working close by. I think in that inverter it is the inductors. I find that is is not the Sound but a frequency (non-sound) harmonic that is radiated. I am sure you can use a scope to see this, but a easy way to understand this is to lightly hold a large flat NEO magnet in your cupped hand. Then place your hand close to the DC power feed cables running from the battery bank to your inverter. The magnet will vibrate (resonate) at that inverters frequency. I find that when charging from the inverter or inverting heavy from the battery you can have large amounts of harmonics, and it is interesting to see how much the magnet vibrates in your hand. The suggestion of twisting the cables really helps reduce this! On a side note the Magnum inverter has different harmonics than the Outbacks. So, do you have a place that the employee can move to that is not near the inverter? I think that is the simple solution. Logan Ron Young wrote: Mike, Some interesting points, thank you. I would have attributed the problem to several of the mentioned issues, medications (HRT), clenching, tension... But what happened a couple of days ago makes me wonder. I turned on the inverter without her knowledge and within two minutes she was complaining and asked me if it was on. It was right at quitting time and she was out of the environment within 7-8 minutes but the next day she complained that she had a migraine that night. Ron Yep, it's gotta be the sound. I'm 95+% sure... If you want to try to tweak things, a decent microphone running into a higher sample rate A/D on a laptop with (96 kHz or 192 kHz) and a program with spectrum analyzer can help to adjust things to possibly quiet it down some. Maybe if you know someone into audio you could have them come over and bring their goodies to help you sorta see the sound in the room. Then, you could try tweaking things lik, tightening screws and putting in a baffle or something until that 20 kHz frequency spike comes down, say, 10 or 20+ dB or so. Might just work. But, then again. boB On 4-Feb-10, at 6:41 PM, Ron Young wrote: forwarded from earth2 Begin forwarded message: *From: *Michael Gullo mgul...@comcast.net mailto:mgul...@comcast.net *Date: *February 4, 2010 5:47:56 PM PST (CA) *To: *RE-wrenches re-wrenches@lists.re-wrenches.org mailto:re-wrenches@lists.re-wrenches.org *Subject: **Re: [RE-wrenches] Inverter causing migraine? **Reply-To: *RE-wrenches re-wrenches@lists.re-wrenches.org mailto:re-wrenches@lists.re-wrenches.org Hi Ron and the group, The attribution of negative health effects to exposure to electromagnetic fields or activated electric equipment has not been confirmed in random double-blind provocation studies involving persons reporting hypersensitivity to electricity. Before we accuse are hard-working inverters, let's look at some facts. There are 13 different categories of headaches which are divided into over 129 sub-types. Many people call every headache they experience as migraine when in fact there are specific inclusion criteria to make diagnosis of migraine. The rubber band tightening around my head is a classic symptom of tension-type headache. Given a mid 50's female, there are more likely one or more provoking factors: medications, sleep pattern, hormonal replacement therapy, stress (clenching, TMJ), smoker, foods (aged cheese, alcohol, caffeine, chocolate, dairy products, MSGs, etc). Does she work at a computer using a chair with no arms and no lower back support with a monitor slightly higher than eye level? This is an extremely common scenario in which the employee comes to work symptom-free and by 12 or 1:00 develops a headache or neck ache. If she really wants some answers, she will need to keep a headache diary for several weeks and seek professional help. You could cycle the inverter on/off to see if there is a direct correlation between the incidence of the headaches and runtime of the inverter. BTW, the placebo effect, as mentioned in other emails, is between 40-60% effective at resolving symptoms. Hope this helps a bit. Mike Michael Gullo Solar Solutions LLC Marlton, NJ NABCEP Certified PV Installer T Diplomate American Board of Orofacial Pain - Original Message - From: Ron Young
Re: [RE-wrenches] Small Torque Wrench
Hi Peter I use a Deflecting Beam Torque Wrench from Warren Brown. You can order online direct. http://www.warrenandbrown.com.au/PrecisionTools/ProductTree.aspx?From=CatProductId=61 Cheers Logan We have a great torque wrench for snugging down module clamps, Sharp SRS bolts, etc. What do folks use to insure that wire terminals are torqued to spec? We're talking 1.1 to 3.3 N-m (10-30 in-lbs). I'm imagining something compact like an over-sized screwdriver. - Peter Peter T. Parrish, President California Solar Engineering, Inc. 820 Cynthia Ave., Los Angeles, CA 90065 Ph 323-258-8883, Mobile 323-839-6108, Fax 323-258-8885 CA Lic. 854779, NABCEP Cert. 031806-26 peter.parr...@calsolareng.com ___ 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
Re: [RE-wrenches] scope info
Hi Bob It depends on what you want to use it for. I have one and use it to check generator wave forms, inverter wave forms and such. Because it is small and inexpensive with just a couple of functions it is great. That coupled with the price I do not feel bad having it in my truck, or it gets broken. But for any real bench work it will not fit the bill. More questions, just drop me a line off list. Logan *Does anyone know if this scope is something usefull enough to have or something to stay away from?* ** ** *VELLEMAN Personal Scope* *Model* *HPS10* Thanks, Bob ___ 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
Re: [RE-wrenches] On demand Electric with pre heated water
Hi karl We are trying a HeatPump heater as backup for a solar hotwater system. Trying to get away from propane. http://www.airgenerate.com/products/specs.html http://www.toolbase.org/TechInventory/TechManufacturers.aspx?ContentDetailID=862 Time will tell it it works. Logan Hi Wrenches, Have any of you experience with on demand electric water heaters? I have a large space heating system I'm putting in a cramped utility room, and the on demand water heater might be the only option. family of 4, 3 bath house. marathon 105 gal solar storage tank. I'm looking for any information or suggestions on which if any electric on demand heater will manage pre heated water. The other option is to use a marathon 40 gal backup and use a variable speed well pump, and therefore a tiny pressure tank. (#15) that'd be my preferred, but I want to give the customer options. thanks in advance, karl -- Karl Schwingel NABCEP Certified Solar Thermal Installer NorthWind Renewable Energy LLC PO Box 723 Stevens Point, WI 54481 k...@northwindre.com Cell: 715 209 0446 Fax : 715 952 4501 This e-mail message is confidential, is intended only for the named recipient(s) above, and may contain information that is privileged or exempt from disclosure under applicable law. If you have received this message in error, or are not a named recipient(s), you are hereby notified that any dissemination, distribution or copying of this e-mail is strictly prohibited. If you have received this message in error, please immediately notify the sender by return e-mail and delete this e-mail message from your computer. Thank you. ___ 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
