I forget, is this an existing already built site, or a new one you’re
designing? I agree with Bill, anything over 50 to 100 watts I would be
designing with a 48V battery string, which means 56 volts. If one odd piece of
gear needs regulated 48V, or the opposite polarity from everything else, then
use a DC-DC converter. I wouldn’t generate 54V, surely that Ubiquiti thingy
will run on regulated 48V if it isn’t spec’d up to 60V. Nothing needs exactly
54V.
In addition to the heavy wires and conversion losses trying to get that much
power at 12V, consider battery runtime. A 100 Ah battery is 1200 watt-hours.
With 250 watts of load, that’s 5 hours, probably half that after factoring in
LVD and conversion losses. So if the site actually draws that much power,
you’re going to need more batteries anyway. Put 4 of those 100 Ah batteries in
series. If you really just need a couple hours runtime, I have a lot of
smaller sites built with 4 x 22 Ah batteries in series and a Traco TSP-BCM48.
From: AF <af-boun...@af.afmug.com> On Behalf Of Bill Prince
Sent: Wednesday, June 19, 2019 8:26 AM
To: af@af.afmug.com
Subject: Re: [AFMUG] UPS and DC to DC conversion
You need 5 amps at 50 volts from a 12V supply? That's 250 watts. Asking for a
12V/20amp supply is asking a lot.
bp
<part15sbs{at}gmail{dot}com>
On 6/18/2019 10:19 PM, Sterling Jacobson wrote:
Having a hard time figuring out the exact part/price for something like this.
Which Meanwell part would take 48v and make it 50v or 54v 5A?
From: AF <mailto:af-boun...@af.afmug.com> <af-boun...@af.afmug.com> On Behalf
Of Adam Moffett
Sent: Tuesday, June 18, 2019 10:21 PM
To: af@af.afmug.com <mailto:af@af.afmug.com>
Subject: Re: [AFMUG] UPS and DC to DC conversion
That's weird to me. Any telecom equipment made for 48v I would have assumed
they intended it to be used with a rectifier, and consequently I would assume
it'd be ok up to at least 56v continuous; and maybe more like 60-70v for a
short duration. But yeah, DC-DC converter is the fix.
On 6/18/2019 11:36 PM, Sean Heskett wrote:
You need to use a DC-DC converter for sensitive equipment like that. Meanwell
has a good selection.
On Tue, Jun 18, 2019 at 8:12 PM Sterling Jacobson <sterl...@avative.net
<mailto:sterl...@avative.net> > wrote:
Apparently the UBNT EP-S16 freaks out if it goes above 54v.
Is there any way to assure it doesn’t float/charge above 54v, or maybe even
just 50v?
From: AF <af-boun...@af.afmug.com <mailto:af-boun...@af.afmug.com> > On Behalf
Of TJ Trout
Sent: Tuesday, June 18, 2019 7:26 PM
To: AnimalFarm Microwave Users Group <af@af.afmug.com <mailto:af@af.afmug.com> >
Subject: Re: [AFMUG] UPS and DC to DC conversion
contact talley or tessco for a price, don't trust what you see on google, it's
like 50% less
On Tue, Jun 18, 2019 at 6:25 PM TJ Trout <t...@voltbb.com
<mailto:t...@voltbb.com> > wrote:
all 48v systems for battery power will float at 54v, it's also adjustable via
the battery chemistry
On Tue, Jun 18, 2019 at 3:33 PM Sterling Jacobson <sterl...@avative.net
<mailto:sterl...@avative.net> > wrote:
Ok, cool.
So can the 7bc2 be adjusted slightly to output 50v instead of just 48v?
There will be some loss going 100’ or so, right?
From: AF <af-boun...@af.afmug.com <mailto:af-boun...@af.afmug.com> > On Behalf
Of TJ Trout
Sent: Tuesday, June 18, 2019 4:23 PM
To: AnimalFarm Microwave Users Group <af@af.afmug.com <mailto:af@af.afmug.com> >
Subject: Re: [AFMUG] UPS and DC to DC conversion
12-54v is inefficient, if you want 200ah of battery use 4x50ah batteries for a
48v string
ICT24048-7BC2 360W 54v AC-DC + LVD + Charger
ICT-TMP - Temp sensor for charge compensation if batt's outside
ICT-WMB - Wall mount bracket
SITE Monitor - Voltage monitoring
Or
Alternativly;
48v din mount PSU
48v 'dc ups' to charge batt's and provide LVD
OR
48v din 'dc ups' with integrated psu + lvd + charger (i.e. DIN-UPS 48-5 cheaper
options available)
On Tue, Jun 18, 2019 at 2:50 PM Sterling Jacobson <sterl...@avative.net
<mailto:sterl...@avative.net> > wrote:
I’m trying to put a “box” system together for our house POP sites and need help
with the DIN stuff and UPS.
Can you guys give me an idea or example of the following?
I want to take standard AC 15A in from a breaker outside the box.
And using maybe one or two 12v 105AH AGM batteries, supply 50v 6A up the side
of the house.
I have never ordered DIN parts like this, guess I don’t have to use DIN, but
would be nice.
Having a problem finding a DC to DC converter that takes 12v and upconverts to
50v 5-6A.
Is this the cost effective method? Something like this:
Monitoring Sitemonitor Base Unit II SMON Base II
1.00 $100.00 $100.00
UPS Monitor Sitemonitor Int MorningStar MeterBus SMON MorningStar
1.00 $60.00 $60.00
UPS Charge MorningStar Sunsaver Dual
1.00 $165.00
$165.00
Battery AGM Deep Cycle 105AH NPP FT12-105AH
2.00 $225.00 $450.00
DIN Parts like DC fuse/breakers and trunk stuff
1.00 $100.00 $100.00
DC 12v to 50v 5A
1.00
$150.00 $150.00
--
AF mailing list
AF@af.afmug.com <mailto:AF@af.afmug.com>
http://af.afmug.com/mailman/listinfo/af_af.afmug.com
--
AF mailing list
AF@af.afmug.com <mailto:AF@af.afmug.com>
http://af.afmug.com/mailman/listinfo/af_af.afmug.com
--
AF mailing list
AF@af.afmug.com <mailto:AF@af.afmug.com>
http://af.afmug.com/mailman/listinfo/af_af.afmug.com
--
AF mailing list
AF@af.afmug.com
http://af.afmug.com/mailman/listinfo/af_af.afmug.com
