Or use a tower ground return and use both of your wires bonded together. Not a preferred solution. 120 ac is better.
Sent from my iPhone > On Nov 28, 2018, at 8:40 PM, Forrest Christian (List Account) > <[email protected]> wrote: > > 6x450i=120W > 4x450m=320W. > > 440W. > Round up to 10A@48VDC. > > 10A will drop 25V over that distance on 14GA wire, so. Not doable with your > existing wire. Even 10AWG is borderline. > > You're either going to have to run multiple wires, or run AC power up to the > top. > > I'd probably just put a din rail 10A 48DC power supply up at the top. Or > something like a Meanwell HEP-480-48 which might be safer as far as 'bare > wire hazard' goes. > > >> On Wed, Nov 28, 2018 at 7:51 AM Tyson Burris <[email protected]> wrote: >> Hey Forrest, >> >> >> >> Can I hijack this and get some questions answered? >> >> I would like to put four 450M’s on an existing site we have. >> >> 500 ft up with 14 Guage DC and fiber running up it to a NEMA. >> >> We currently push 48Volt supporting existing 450i gear that will stay up. >> >> >> >> My space at the top is limited. I will have to use your small Sync Injector >> PRO to power the new 450Ms. >> >> Can you recommend a power supply for the bottom to push DC up? >> >> I have some concerns with the current wire guage supporting the new load >> plus the six existing 450i units that are staying. >> >> >> >> Thoughts? Ideas? >> >> >> >> Tyson Burris, President >> Internet Communications Inc. >> 739 Commerce Dr. >> Franklin, IN 46131 >> >> Daytime # 317-738-0320 >> Cell/Direct # 317-412-1540 >> Online: www.surfici.net >> >> >> >> >> >> What can ICI do for you? >> >> >> Broadband Wireless - PtP/PtMP Solutions - WiMax - Mesh Wifi/Hotzones - IP >> Security - Fiber - Tower - Infrastructure. >> >> CONFIDENTIALITY NOTICE: This e-mail is intended for the >> addressee shown. It contains information that is >> confidential and protected from disclosure. Any review, >> dissemination or use of this transmission or its contents by >> unauthorized organizations or individuals is strictly >> prohibited. >> >> >> >> From: AF <[email protected]> On Behalf Of Forrest Christian (List >> Account) >> Sent: Wednesday, November 28, 2018 12:29 AM >> To: AnimalFarm Microwave Users Group <[email protected]> >> Subject: Re: [AFMUG] Solar Array Voc >> >> >> >> Let me see if I can re-phrase my question: >> >> >> >> I'm redesigning a voltage input circuit for one of the sitemonitor products >> - this is for voltage metering, not for powering the device. One of the >> common questions I get asked is 'can I monitor my solar array voltage'. >> Currently the answer is usually 'probably not, unless you are certain the >> Voc is below 60V, and that one side of the array is already grounded to >> common (often isn't for mppt controllers)'. I'd rather be able to say >> something like 'sure, as long as the Voc isn't over X volts', where X is >> high enough that it contains a reasonable subset of the arrays out there. >> I don't think supporting 150V arrays is in the cards (and yes, I know the >> tristar MMPT goes up to 150V), since that starts getting in the range where >> clearances get hard to do on the circuit board. >> >> >> >> So I guess the question should be: What voltage would be able to measure >> most of the array voltages out there? >> >> >> >> On Tue, Nov 27, 2018 at 7:07 PM Robert <[email protected]> wrote: >> >> Morningstar makes one of the better charge controllers and the one that >> I like has ethernet access built in. It takes up to 150 V from the >> arrays. They also have their new Mega Controller that will do up to >> 600 Volts I don't know of any WISPs that are using it. We have sites >> that we have 2x Morningstars feeding our battery sets... >> >> Robert >> >> On 11/27/18 5:07 PM, Forrest Christian (List Account) wrote: >> > Looking at determining the maximum reasonable voltage range for a new >> > product I'm working on. >> > >> > I'm wanting to include a reasonable input for measuring solar panel >> > voltage (a common request). For those who are running solar arrays to >> > charge a DC site (not grid-connected), I'm wondering what type of array >> > voltages you're running. I'd prefer the Voc figure since that is worst >> > case, but even the nameplate voltage (i.e. multiples of 12V) would be >> > useful since I can kinda infer the Voc from that. >> > >> > I suspect some of you are running rather high voltages (>100Voc) on your >> > arrays, not sure If I'm going to be able to measure that high, but would >> > like to get a feel for what the reality is. >> > >> > -- >> > *Forrest Christian* /CEO//, PacketFlux Technologies, Inc./ >> > Tel: 406-449-3345 | Address: 3577 Countryside Road, Helena, MT 59602 >> > [email protected] <mailto:[email protected]> | >> > http://www.packetflux.com <http://www.packetflux.com/> >> > <http://www.linkedin.com/in/fwchristian> >> > <http://facebook.com/packetflux> <http://twitter.com/@packetflux> >> > >> > >> > >> > >> >> -- >> AF mailing list >> [email protected] >> http://af.afmug.com/mailman/listinfo/af_af.afmug.com >> >> >> >> >> >> -- >> >> Forrest Christian CEO, PacketFlux Technologies, Inc. >> >> Tel: 406-449-3345 | Address: 3577 Countryside Road, Helena, MT 59602 >> >> [email protected] | http://www.packetflux.com >> >> >> >> >> -- >> AF mailing list >> [email protected] >> http://af.afmug.com/mailman/listinfo/af_af.afmug.com > > > -- > Forrest Christian CEO, PacketFlux Technologies, Inc. > Tel: 406-449-3345 | Address: 3577 Countryside Road, Helena, MT 59602 > [email protected] | http://www.packetflux.com > > > <image001.png> > -- > AF mailing list > [email protected] > http://af.afmug.com/mailman/listinfo/af_af.afmug.com
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