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Unifi PoE Switch powered by a 24V Supply (Solar or Battery)

Hello everybody, is there a way to power a Unifi PoE Switch with a 24V Supply (Solar or Battery) with no 220V inverter in the solution?? (Dont care about customization\Warranty).

 

Thank you for your time

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Re: Unifi PoE Switch powered by a 24V Supply (Solar or Battery)


@Andgeo wrote:

Hello everybody, is there a way to power a Unifi PoE Switch with a 24V Supply (Solar or Battery) with no 220V inverter in the solution?? (Dont care about customization\Warranty).

 

Thank you for your time


Not entirely sure I'm understanding what you need to do here - some UniFi switches have direct DC inputs, and you can use those from any properly sized DC source.   All of the switches use 48VDC (or sometimes 54VDC) power supplies internally, although a few also have 24V outputs to drive parts of the circuitry.   These voltages can all be generated from 24V battery or DC power using boost converters.   For PoE switches the amount of power needed is usually the limiting factor.

 

Which specific switches are you looking to use?

Jim

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Re: Unifi PoE Switch powered by a 24V Supply (Solar or Battery)

 

image.png

 

Basically something like this but in unifi combatibility (direct connection to 24V DC to power the device) the Edgepoint  would be perfect but it isn compatible with Unifi Controller.

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Re: Unifi PoE Switch powered by a 24V Supply (Solar or Battery)

[ Edited ]

You show an outdoor-rated switch example. If you want

a smal UniFi PoE switch, your choice is probably the

US-8-60W:

   https://dl.ubnt.com/datasheets/unifi/UniFi_Switch_8_DS.pdf

 

It can operate with its provided 48V ac mains power supply or

with an 802.3af / at PoE input--also 48V. It provides PoE ouputs

on four ports--if it has enough dc input current [802.3at]. It does

not support 24V 'passive' PoE.

 

So, as Jim says, you can use an inexpensive boost regulator

from your power source and apply 48V to the coax dc input instead

of the dc power supply it normally uses.

 

US8-150W is the smallest UniFi switch with both 802.3af and

24V passive PoE on its ports; it does not have a PoE input or

a dc power input jack; it is ac mains only.  Dave


> HQ in Seacoast region New Hampshire U.S.A.
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Re: Unifi PoE Switch powered by a 24V Supply (Solar or Battery)

No No you got me wrong, sorry i might have explained it badly...
I need a way to get one of the Unifi PoE Switches (8 or 16) to operate with 24V DC directly
(Basically i have a Ship with 6x24V Batteries and a Gennerator with 220V, when Gen is on everything is perfect, but when i switch it off all networking and cammeras go offline, i could use a inverter to connect the batteries to give me 24V --> Inverter (220V) ---> Internal/External Power adaptor (24V) to power the device.... all this is a huge waste of power...
On a link i did on a mountain as a relay because of NLOS i used a Solar Panel (24V) ----> Battery (24V) ----> Edgepoint 8 (24V) ---> powers 3xRocket AC Lite directly.
I need a solution like that. (the Switches internally dont work with 220V they should work in 12V or 24V or 54V, has anybody opened a switch to give DC directly to one of the switches?
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Re: Unifi PoE Switch powered by a 24V Supply (Solar or Battery)

[ Edited ]

An other Solution is to use:

 

EdgePower 24V 72W


EP-24V-72W

The EdgePower 24V 72W is a UNMS monitored and managed 24V DC power supply with integrated battery backup. This product provides WISPs with an easy-to-install 24V redundant power supply that includes a management user interface and simple 12V battery backup charger with multiple 24V outputs for small sites.


100-240VAC, 50-60 Hz, Universal Input
24V DC Output (terminal connector with dual DC barrel jack included)
12V Lead Acid Battery Input*
Two, 10/100 Ethernet, 24V Passive PoE output, switch ports


On each PoE 8 Switch 150W and ballance the Power between the 2 Switches

8x G3 Cameras (4W)  = 32W

1x Cloud Key Gen2    = 13W

1x AP Lite                    = 6.5W

1xRocket AC Lite        = 9W

2x US-8-60W (12W)  = 24W

 

But i preffer a direct solution with 1x 16 or 24 PoE Switch

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Re: Unifi PoE Switch powered by a 24V Supply (Solar or Battery)

[ Edited ]

@eejimm wrote:

@Andgeo wrote:

Hello everybody, is there a way to power a Unifi PoE Switch with a 24V Supply (Solar or Battery) with no 220V inverter in the solution?? (Dont care about customization\Warranty).

 

Thank you for your time


Not entirely sure I'm understanding what you need to do here - some UniFi switches have direct DC inputs, and you can use those from any properly sized DC source.   All of the switches use 48VDC (or sometimes 54VDC) power supplies internally, although a few also have 24V outputs to drive parts of the circuitry.   These voltages can all be generated from 24V battery or DC power using boost converters.   For PoE switches the amount of power needed is usually the limiting factor.

 

Which specific switches are you looking to use?

Jim


4x US‑8‑60W (4x 4 PoE Ports) = 16 PoE Ports Total
or
2x US‑8‑150W
or
1x US‑16‑150W

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Re: Unifi PoE Switch powered by a 24V Supply (Solar or Battery)

I'm not sure you read the details correctly or read

the data sheet I linked to; it shows connections.

 

As Jim and I pointed out, these switches operate

on 48Vdc power and provide 48V [802.3af] PoE

power at their ports. For the US8-60W switch, it

uses only dc input--it has no ac mains. A provided

power supply 'brick' provides that dc from ac mains.

 

So if you want to power the US8-60W, there are no

internal parts to bypass--it requires 48V. It doesn't

even output 24V PoE to any of its ports.

 

If you want to experiment with operating US8-60W on

a 24V power supply, you can. I have no idea what the

result will be; it's not what the switch is rated for. In

any case, the PoE output is very unlikely to work,

because it depends on an 802.3af handshake to enable

power to each port.

 

Your only reliable way to use a UniFi switch in your setup

is to add a very low-cost 12 to 24V boost regulator to

power the US8-60W dc input connector. But again: that

will not provide 24V PoE output to its ports.   Dave


> HQ in Seacoast region New Hampshire U.S.A.
> Ubiquiti Certified Trainer [UCT] for:
     UBWA [AirMax] / UEWA [UniFi] / UBRSS [routers]
UBNT.NH@gmail.com
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Re: Unifi PoE Switch powered by a 24V Supply (Solar or Battery)

[ Edited ]

Yes, im afraid you all are right, i also remembered that the US‑8‑60W has only 4 active ports, so only
2x US‑8‑150W
or
1x US‑16‑150W

will do im afraid...
Any idea on the internal structure of these??

 

It is a pity Unifi Switches have not an flexible input as the Edgepoint or a internal adapter as the USG Pro 4.

The Best of two worlds Unifi and Edge will be great, i prefer the Edge as Networking sollution but i need the UI of the Unifi Controller to Manage Client Guest Network vouchers and statistics etc...  

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Re: Unifi PoE Switch powered by a 24V Supply (Solar or Battery)

[ Edited ]

As Jim clearly pointed out [and I echoed], their

'internal structure' uses 48V. I don't know of anybody

who tried to hack these to somehow bypass anything

for 24V operation. These larger switches are designed

to support 48V [802.3af] all the way to the ports.

 

I can't say it's impossible; I can say it's goofy.

 

It's not a 'pity': these are different product lines with

very different scenarios. UniFi switches are used in a

building to support UniFi access points. Of course,

there are outdoor access points, but those are typically

much less common than the indoor ceiling types. And

these radios can--and usually do--use 802.3af PoE.

 

AirMax radios use 24V passive PoE exclusively; EdgePoint

is intended to support those radios.

 

But I think you have a paper tiger; there's no requirement to

use UniFi switches to support UniFi radios. All that client

stuff and statistics are in the controller and possibly the

USG router--not in the switches. You can easily configure

EdgeSwitch / EdgeRouter / EdgePoint to do the job.   Dave


> HQ in Seacoast region New Hampshire U.S.A.
> Ubiquiti Certified Trainer [UCT] for:
     UBWA [AirMax] / UEWA [UniFi] / UBRSS [routers]
UBNT.NH@gmail.com