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 <t...@franklinisp.net> 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* <http://www.surfici.net> > > > > [image: ICI] > > *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 <af-boun...@af.afmug.com> *On Behalf Of * Forrest Christian > (List Account) > *Sent:* Wednesday, November 28, 2018 12:29 AM > *To:* AnimalFarm Microwave Users Group <af@af.afmug.com> > *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 <i...@avantwireless.com> 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 > > forre...@imach.com <mailto:forre...@imach.com> | > > 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 > AF@af.afmug.com > 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 > > forre...@imach.com | http://www.packetflux.com > > <http://www.linkedin.com/in/fwchristian> <http://facebook.com/packetflux> > <http://twitter.com/@packetflux> > > -- > AF mailing list > AF@af.afmug.com > 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 forre...@imach.com | http://www.packetflux.com <http://www.linkedin.com/in/fwchristian> <http://facebook.com/packetflux> <http://twitter.com/@packetflux>
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