How much is enough to matter?
Without temperature compensation you're undercharging all winter and
overcharging all summer. My understanding is that's going to
permanently reduce your capacity.
Even if you have climate control, the battery makes heat when charging
and discharging, so if you tape the sensor to the positive terminal you
can benefit from temperature compensation even if the room is always 70
degrees.
------ Original Message ------
From: "Mathew Howard" <[email protected]>
To: "af" <[email protected]>
Sent: 4/3/2018 5:27:27 PM
Subject: Re: [AFMUG] Traco BCMU360 24 or 48v
I didn't realize the BCMU had temperature controlled charging... that
would be an advantage, but if you have it in a box with a power supply,
switch and such, it's going to stay pretty warm in the winter anyway...
we don't heat or cool any of our boxes, and the majority don't even
have ventilation, and I haven't seen any real problems with just using
a static float voltage. It may lose us a bit of battery life and/or
capacity, but I don't see that it's enough to matter.
On Tue, Apr 3, 2018 at 4:10 PM, Darin Steffl <[email protected]>
wrote:
The one thing that worries me about using the DR-UPS40 is that it
doesn't have temperature controlled charging like BCMU does. So we
would have to set one charging voltage that is static which will be
under voltage in the winter and over voltage cooking the batteries in
the summer when the box is hot. We don't heat or cool our boxes so I
was looking for something with a little more control of the float
voltage with the temperature differences we have. I also would like to
only use one battery instead of two.
On Tue, Apr 3, 2018 at 4:06 PM, Mathew Howard <[email protected]>
wrote:
I'm the Netonix would be doing any voltage up/down conversion you'd
need to do in that setup anyway, so I don't really see much advantage
to 24v vs 48v one way or the other.
In a setup like that, I'd personally just use the Meanwell SDR-240-24
with a Meanwell DR-UPS40, and do 24v batteries, instead of using the
BCMU-360. You need two batteries instead of one then, but it's
cheaper and doesn't have the issues Paul mentioned.
I don't have any experience with the Tycon webmonitor, but I
definitely can recommend using a SiteMonitor.
On Tue, Apr 3, 2018 at 3:52 PM, Paul McCall <[email protected]> wrote:
Be aware that the BCMU-360 does the following:
Only sustains at 240w
Only outputs about 45v when running on batteries. We have started
using a step up kit to bring it back to 48v+
Paul
From: Af <[email protected]> On Behalf Of Darin Steffl
Sent: Tuesday, April 3, 2018 4:50 PM
To:[email protected]; [email protected]
Subject: [AFMUG] Traco BCMU360 24 or 48v
Hey guys,
We're looking at fine tuning our DC power solution for sites using
more than 75w of power.
We're setting in with using the Traco BCMU-360 with a Meanwell
SDR-240-24 or 48 volts power supply.
If we're using the Traco UPS unit, is there any advantage to using
24v vs 48v power supply? It will only be powering a Netonix DC
switch and the BCMU only needs a 12v battery.
Also, we're looking at SiteMonitor to monitor the battery voltage
and grid power as well. Do you recommend this or the Tycon
webmonitor (TPDIN)?
Thanks
--
Darin Steffl
Minnesota WiFi
www.mnwifi.com
507-634-WiFi
<http://www.facebook.com/minnesotawifi> Like us on Facebook
<http://www.facebook.com/minnesotawifi>
--
Darin Steffl
Minnesota WiFi
www.mnwifi.com
507-634-WiFi
<http://www.facebook.com/minnesotawifi> Like us on Facebook
<http://www.facebook.com/minnesotawifi>
