I got one of these puppies to try out after I bumped into them at WISP
America:
http://www.ict-power.com/products/modular-power-series/
700W 1+1, 700W 1+0, or 1400W 2+0, with battery management, network
monitoring, and 4 load breakers in 1U. You can also swap the load
distribution and battery module for additional 700W PSU's, but I'll
never have that much stuff at one site.
The network module does HTTP, SNMP, email alerts, syslog, and local
logging, it also has an auto-ping reboot if you're into that.
Cons so far:
* The DC bus connector bolts (1/4-20) are excessively long and
uncomfortably (to me) close to other metal parts. Will replace with
shorter ones before deployment.
* DC bus and battery terminal uses Nylock nuts, so no hand tightening.
* The battery terminal on battery module seemed to wobble quite a bit
while I was tightening. I worried I would break it.
* Was temporarily confused by having only one battery connection on
the device. Wiring diagram in the manual clarified that +battery
post goes to + DC Bus terminal, -battery post goes to -Batt terminal.
* A bit more expensive than our DIN rail setups.
Pros:
* Everything in 1U, if you're going rack mount then this is way more
space efficient than putting a DIN rail in the rack.
* Simple, Intuitive web management
* Has every feature I wanted
* Cheaper than a comparable Valere Flatpack.
My "cons" list is very bitchy and nitpicky, but those are really my only
complaints so far. I'd be curious if anyone has used this and had
anything to add.
-Adam
On 6/16/2018 12:49 PM, Brandon Yuchasz wrote:
Thanks Chuck.
We expect depending on which site to have between a 3 amp and 5 amp
load. Have not settled on the Ah of batteries yet just getting started
on this.
*From:*[email protected] [mailto:[email protected]]
*Sent:* Saturday, June 16, 2018 10:36 AM
*To:* Brandon Yuchasz; [email protected]
*Subject:* Re: [AFMUG] building our own 48volt DC sites grid tied.
Any telecom charger/rectifier will last for 20 years easy.
What kind of load amps do you need to run? How big are the batts?
Your rectifier needs to be able to pull the full load current plus the
heavy battery recharge current when the power comes back on. Having
one that limits current is good. Say you have a 5 amp load current
and a 100 Ah battery, you are going to have a minimum of 10 amps of
battery charge current after an outage. Probably more like 20. So a
25 amp rectifier to run a 5 amp load plus batts would not be out of
question.
I like eltek/valere modular units.
*From:*Brandon Yuchasz
*Sent:*Saturday, June 16, 2018 9:27 AM
*To:*[email protected]
*Subject:*[AFMUG] building our own 48volt DC sites grid tied.
After finally diving into our first 48 volt solar site last year we
are now looking to convert some of our more critical sites to 48 volt
battery banks that are still grid tied for charging the systems. The
plan being to extend the run time on the sites when we lose power.
Would anyone that is doing this type of system be willing to share
some sources for the chargers that have stood the test of time in your
network? I am seeing these sites as 4 12 volt deep cycles ( or if
room allows 8 – 6 volt ) this battery bank will feed new Packetflux
Rack injectors, and the battery banks will be kept topped off by the
charge controller.
Thanks everyone,
Brandon
------------------------------------------------------------------------
--
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
