Yeah, how many AH worth of batteries you have doesn't really affect how big of wire you have to use, if the power supply can only give you 7.5 amps, that's all the wire needs to be able to handle. Of course if you have too many batteries, it's going to take forever to recharge them, but for our applications, that isn't generally a big deal.
On Mon, Nov 26, 2018 at 2:59 PM Adam Moffett <[email protected]> wrote: > The BCM48A can take 10 gauge wire on the battery terminal. > I would assume the BCM48 is the same, but I don't have any of those. > > Keep in mind the 360Watt unit at 48V means there can't be more than a > 7.5amp load. On the 600Watt (BCM-48A) you can't have more than 12.5amp, > and in fact there's a 12.5amp fuse on the battery circuit. So you don't > need wire for a larger load than that. #10 AWG is more than sufficient. > > I use 100ah x 4, so 4800 watt-hour. A site with 3 Trango Lynx and a > Telrad Compact ran for 18 hours without utility power, so the thing does > its job. > > -Adam > > > > On 11/26/2018 3:31 PM, SmarterBroadband wrote: > > Ken > > > > How many AH of battery do you hang off one of these units? > > > > Battery connections look very small… > > > > Adam > > > > *From:* AF [mailto:[email protected] <[email protected]>] *On > Behalf Of *Ken Hohhof > *Sent:* Friday, November 23, 2018 1:35 PM > *To:* 'AnimalFarm Microwave Users Group' <[email protected]> > <[email protected]> > *Subject:* Re: [AFMUG] 48v Power Supply Switches > > > > What are you doing for battery backup? > > > > Another option we use at most of our medium size towers now is the Traco > TSP-BCM48 battery control module with a TSP360-148 power supply. They do > have a 600W version I think it is TSP-BCM48A and TSP600-148 but I haven’t > used them. > > > > I’m going to guess you have AC UPS’s with a big-ass battery string? > > > > > > *From:* AF <[email protected]> *On Behalf Of *Mathew Howard > *Sent:* Friday, November 23, 2018 1:57 PM > *To:* AFMUG <[email protected]> > *Subject:* Re: [AFMUG] 48v Power Supply Switches > > > > Yeah, 1000 watts does seem like overkill for... the biggest power supply > I've used on any of our towers is 480 watt, and I figured that should be > more than double what we actually are using. I mostly use Meanwell 240 watt > DIN rail mount power supplies these days. > > > > On Fri, Nov 23, 2018 at 12:08 PM Ken Hohhof <[email protected]> wrote: > > I assume you want an AC/DC power supply not a switch? Mean Well is a > good brand, personally I prefer the HRP series especially if you putting it > at a tower site because it is a high reliability model with a wider > temperature range, the price difference won’t break the bank. I tend to > keep HRP-150 and HRP-300 supplies on the shelf. > > > > Also that’s a pretty big power supply. Do you really need that much > power? It makes sense to have some extra capacity to handle inrush > current, but probably not more than double. Power supplies tend to be > inefficient when run way below max rating. If you really need 1000 watts, > maybe a rectifier shelf with N+1 redundant power modules would be a better > choice. Or for the higher power consumption radios like licensed > backhauls, some WISPs like to use a 100 or 150W power supply for each radio. > > > > *From:* AF <[email protected]> *On Behalf Of *Chuck McCown > *Sent:* Friday, November 23, 2018 10:01 AM > *To:* AnimalFarm Microwave Users Group <[email protected]> > *Subject:* Re: [AFMUG] 48v Power Supply Switches > > > > I have always had great luck with Meanwell products. > > > > *From:* Alex Davidson > > *Sent:* Friday, November 23, 2018 8:11 AM > > *To:* [email protected] > > *Subject:* [AFMUG] 48v Power Supply Switches > > > > Hey guys, we are stepping up to some 48v equipment on a tower and in > looking into power supply switches. This seemed to be something that would > work for us (Mean Well SE-1000-48). Any thoughts or pros and cons that yall > have found with this unit. Any units of similarity that might work well in > place of this one. Thanks > > > > > > > ------------------------------ > > -- > AF mailing list > [email protected] > http://af.afmug.com/mailman/listinfo/af_af.afmug.com > > -- > AF mailing list > [email protected] > http://af.afmug.com/mailman/listinfo/af_af.afmug.com > > > > -- > AF mailing list > [email protected] > http://af.afmug.com/mailman/listinfo/af_af.afmug.com >
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