Battery Powered system (w110v ac charging), battery failure?

RouterOS Wireless Networking
1

Hi,
Im setting up a MT system (wireless) that will be powered (poe) from a ubnt tough-switch (puts 24vdc passive across the cat5 cable to MT rb).-
The power source for the ubnt tough-switch and thus the MT units, will be direct from a 24v DC battery using this battery/charging/power source set:

(Tycon UPS Pro - non solar, 110v ac charging)
http://tyconpower.com/products/systems.htm


My question is, what happens when a battery, or battery cell fails (remember there are no transformers like in a normal direct 110vAC setup)? (some ups pro systems have 4 batteries in parallel) Or when a cell or part of the battery fails? - do you get a voltage spike on the MT or fully loose power?

Anyone have any experience with this setup and what happens to equipment when a battery fails or there are other electrical related issues from the battery side/source. Those with Solar setups prob. experience these potential voltage/power issues, any comments from solar users?

tks

2

There’s a system designed by hipro-tech (though it’s on BETA version right now), which:

a. Is in a U1 rackable mount chassis (4,4cm hight).
b. Implements TWO AC to DC PSUs - in case one dies, the other one keeps providing DC out to CHARGE the INTERNAL batteries.
c. It ALSO provides inputs in its backside, for pluging a SOLAR PANEL which provides DC out to CHARGE the INTERNAL batteries in parallel with the 2 PSUs.
d. It ALSO provides inputs in its backside, for pluging another PSU/Battery/solar system/etc., so when the 2 internal PSUs die, the solar panel dies, the internal battery discharges and mulfactions or “dies”, it’ll be shitched ON (in <20ms - change over unit), providing PoE to the INTERNAL 5 port 10/100Mbps RB750UP (Yes hipro-tech “picked” this router for its design because it was the ONLY one out of 6, that kept working without problems - so far).
e. INPUTS:
1) 90 - 245VAC
2) SOLAR panel
3) EXTERNAL 15 to 29VDC (form a battery/another solar system/psu/don’t care)

3

Any more info and pictures on this?

4

Yes, BETA version is ready and I’ll upload some pics later on. :slight_smile:

5

Here are two photos.

6

Well done - what capacity are the internal batteries?
Also what would happen if one of the POE outputs was shorted would the voltage on the others stay up?

7

They are 2.3Ah total in 24V.
It’s the routerboard RB750UP which has Overcurrent protection at 500mA on each output, so it shuts down only the output that encodes problems.

With powering the RB750UP and the RB435G with a DBII F50NPRO on it at “full load” traffic gen, it can stay up “as is” for about 4 - 5 hours (I cut it down - battery low - at 18V).