I just put up 2 new solar panels yesterday to replace 2 that were now to small
of wattage to cover the expanded load at the tower.
Panels with no load were putting out 35 vdc, at the batteries with load I was
seeing 28 vdc.
I use the tycon voltage regulator to maintain 24 vdc to the radios. Added cost,
yes, but this is a remote site with important backhaul and I don’t need to burn
a radio out.
I was also taking 12 vdc from one of the batteries, but found it would drain it
in about 2 weeks... the batteries do not charge evenly, maybe one of our EE
members can explain this.
4 12 vdc batteries, 2 in series, then the 2 sets in parallel., most equipment
is taken from the 24 vdc, one switch takes power from the 12 vdc. Why does this
not keep all batteries charged equally, when using the solar at +27 volts.
Tim Kerns
CV-Access, Inc.
From: Josh Luthman
Sent: Thursday, October 18, 2012 7:49 AM
To: WISPA General List ; fai...@snappydsl.net
Subject: Re: [WISPA] Another Ubiquity question
Because batteries are 27v.
On Oct 18, 2012 10:45 AM, "Faisal Imtiaz" <fai...@snappydsl.net> wrote:
Call me Stupid... but what is the point of this discussion ?
Operating the Radios @ 27V is exceeding the Mfg. Specs. .....
Will they work ? maybe...
Will they fail ? maybe....
If you burn them up..... you are on your own.. ? or at least at
UBNT's discretion, since you are voiding the warranty, by operating our
of Specs.
Will it shorten the life of the Radio ? maybe...
Will is just work fine ? maybe.....
This reminds me of the discussions on the CPU Over-Clockers Forum......
If you want to play, sure nothing wrong with that.. but you are on
your own ..
If you expect it to preform well for a long time, then it is best to
stay within the Mfg. Specs ...
I have often said this to folks.... In our industry, when you exceed
Specs.... things don't just 'break'.... but they do start doing 'funky
stuff'....
Of Course YMMV
:)
Faisal Imtiaz
Snappy Internet & Telecom
On 10/18/2012 10:06 AM, Justin Wilson wrote:
> We see 27.3 volts at the battery. And 27.1 volts at the top with no
load.
> Obviously load will have an impact on this.
>
> Justin
>
> -----Original Message-----
> From: Jeromie Reeves <jree...@18-30chat.net>
> Reply-To: WISPA General List <wireless@wispa.org>
> Date: Thursday, October 18, 2012 9:15 AM
> To: WISPA General List <wireless@wispa.org>
> Subject: Re: [WISPA] Another Ubiquity question
>
>> That depends on wire size. That distance is not going to be ethernet
>> so I will assume #12 AWG, 400ft, copper wire, etc. You should be
>> seeing a 5.6% drop under a 1amp load or about 25v under load.
>>
>>
>> On Thu, Oct 18, 2012 at 6:02 AM, Justin Wilson <li...@mtin.net> wrote:
>>> 27 volts at the base. DC has very little loss over 400-500 foot
>>> distances. We are seeing about .1 volt loss on a 400 foot run.
>>>
>>> -----Original Message-----
>>> From: Scott Lambert <lamb...@lambertfam.org>
>>> Reply-To: WISPA General List <wireless@wispa.org>
>>> Date: Thursday, October 18, 2012 12:16 AM
>>> To: <wireless@wispa.org>
>>> Subject: Re: [WISPA] Another Ubiquity question
>>>
>>>> On Wed, Oct 17, 2012 at 10:14:03PM -0400, Justin Wilson wrote:
>>>>> Many UBNT deployments running at 27volts of clean DC power. Not
>>>>> saying it's ideal but it works.
>>>> 27v at the ethernet port or 27v at the base of the tower?
>>>>
>>>> --
>>>> Scott Lambert KC5MLE Unix
>>>> SysAdmin
>>>> lamb...@lambertfam.org
>>>> _______________________________________________
>>>> Wireless mailing list
>>>> Wireless@wispa.org
>>>> http://lists.wispa.org/mailman/listinfo/wireless
>>>>
>>>
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>
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