Chuck, you tritely think outside the box. But I think this is the best idea yet. There is a company that makes a small 24VDC propane generator. I'll try to find it.
On Thu, Sep 10, 2015, 10:55 PM Chuck McCown <ch...@wbmfg.com> wrote: > You could have a propane generator charge the batts for a hour or two each > day. > > Put it on a timer. Probably be less cost and more reliable than solar. > > *From:* Chuck McCown <ch...@wbmfg.com> > *Sent:* Thursday, September 10, 2015 9:51 PM > *To:* af@afmug.com > *Subject:* Re: [AFMUG] a new one, I think... > Yep. Transformers pass pulses pretty well. If you get a common mode > choke it helps. > *From:* Paul McCall <pa...@pdmnet.net> > *Sent:* Thursday, September 10, 2015 9:47 PM > *To:* af@afmug.com > *Subject:* Re: [AFMUG] a new one, I think... > > > “Bad things can pass transformers”, meaning pass isolation transformers as > well? > > > > *From:* Af [mailto:af-boun...@afmug.com] *On Behalf Of *Chuck McCown > > > *Sent:* Thursday, September 10, 2015 11:45 PM > *To:* af@afmug.com > *Subject:* Re: [AFMUG] a new one, I think... > > > > The transformer on the top of the pole can be considered an isolation > transformer. > > The transformer in the rectifier/charger can be considered an isolation > transformer. > > Bad things can pass transformers. > > > > *From:* Paul McCall <pa...@pdmnet.net> > > *Sent:* Thursday, September 10, 2015 8:24 PM > > *To:* af@afmug.com > > *Subject:* Re: [AFMUG] a new one, I think... > > > > Where in line to use it? We haven’t had great luck with placing those at > the start of the AC path. > > > > *From:* Af [mailto:af-boun...@afmug.com <af-boun...@afmug.com>] *On > Behalf Of *Lewis Bergman > *Sent:* Thursday, September 10, 2015 10:23 PM > > > *To:* af@afmug.com > *Subject:* Re: [AFMUG] a new one, I think... > > > > Why don't you use an isolation transformer? Much cheaper than solar and > less tricky than hanging it on a tower. > > > > On Thu, Sep 10, 2015, 9:04 PM Paul McCall <pa...@pdmnet.net> wrote: > > We charge our batteries now and a 24v array using a Samlex charger. But, > that doesn’t isolate it from grid power. The charger (powered by 110) 24v > output goes to the same “bus” that feeds the batteries. So, BOTH charger > output and battery output are “on” at the same time. > > > > I asked here last week about a way to just run off the batteries, and no > workable solution was found. > > > > *From:* Af [mailto:af-boun...@afmug.com] *On Behalf Of *Cameron Crum > *Sent:* Thursday, September 10, 2015 9:59 PM > > > *To:* af@afmug.com > *Subject:* Re: [AFMUG] a new one, I think... > > > > If you are just looking for AC power isolation, then why not just a bank > of batteries charged by grid power? This would isolate you from powerline > surges. Cell sites have been running this way since the beginning of time. > > > > On Thu, Sep 10, 2015 at 8:38 PM, Paul McCall <pa...@pdmnet.net> wrote: > > In most cases, yes we own the tower. > > > > *From:* Af [mailto:af-boun...@afmug.com] *On Behalf Of *Lewis Bergman > *Sent:* Thursday, September 10, 2015 9:32 PM > > > *To:* af@afmug.com > *Subject:* Re: [AFMUG] a new one, I think... > > > > Do you own this tower? I can't imagine what I would charge someone to put > a solar site on one of my towers. > > > > On Thu, Sep 10, 2015, 8:19 PM Josh Luthman <j...@imaginenetworksllc.com> > wrote: > > If you get enough panels and batteries you'll be fine. If you cheap out > and don't get enough battery run time you'll hate yourself. You're in > Florida so I think with the lack of winter and a proper budget (batteries) > you'll have no problems. > > > > > Josh Luthman > Office: 937-552-2340 > Direct: 937-552-2343 > 1100 Wayne St > Suite 1337 > Troy, OH 45373 > > > > On Thu, Sep 10, 2015 at 9:18 PM, Paul McCall <pa...@pdmnet.net> wrote: > > You are correct on your calculations… my spreadsheet formula was wrong J > I just came up with 104 watts. > > > > I will ask the question naively.. why would you expect a headache? Isn’t > solar tried and true these days? > > > > I am dealing with every aspect of surge protection I possibly can at every > level already, as this summer has been a monster for us on surges. So, am > doing the fiber up the tower in some cases, so I WILL have gear up there, > which has its own sets of “concerns” regardless of how I power them. > > > > So, is a solar setup not reliable? The “expert” claims that he seeing it > more and more in the cellular world, up the tower > > > > Paul > > > > > > > > *From:* Af [mailto:af-boun...@afmug.com] *On Behalf Of *Josh Baird > *Sent:* Thursday, September 10, 2015 9:10 PM > *To:* af@afmug.com > *Subject:* Re: [AFMUG] a new one, I think... > > > > I would at least allow 7.5W per ePMP radio (specs say 7.5 is typical, can > spike to 10), and 10-15W per 320. Maybe another 5-10w per MT radio. That > would be close to 100W. You don't want to underestimate power consumption. > > > > Regarding your solar question.. I'm not sure, but that sounds like one > hell of a headache. > > > > Josh > > On Thu, Sep 10, 2015 at 9:00 PM, Paul McCall <pa...@pdmnet.net> wrote: > > OK, so I am working with a grounding expert today, getting some opinions > on a couple difficult towers, and one of the first suggestions he has for > me as I mention that I am looking to do fiber / DC up this tower is… “Have > you considered going solar up the tower?” (to eliminate power surges > completely from going up the tower) > > > > Hmmmm… > > > > So my brain starts wrestling with that… Is it practical? > > > > Say on a tower with a Netonix DC powered switch running at 48v or 24v, > powering 6 ePMP APs and 2 320APs, 2 Mikrotik Bhs, and a small Mikortik > router. > > > > Would be about 50 watts maximum according to my quick calcs. > > > > Not knowing anything about solar, has battery technology developed enough > that it would be practical (size wise) to have enough batteries and a > charge controller up in a box on a tower? And what size solar panel would > I need to drive that? > > > > Paul > > > > Paul McCall, Pres. > > PDMNet / Florida Broadband > > 658 Old Dixie Highway > > Vero Beach, FL 32962 > > 772-564-6800 office > > 772-473-0352 cell > > www.pdmnet.com > > pa...@pdmnet.net > > > >
