Sure, we will try to expand supported voltage range (12-60V) and try to introduce more 802.3af/at devices, but as you know, I can’t comment anything specific.
speaking about 12W power usage of SXT ac - please note that it will not be easy to reach such power consumption
As you go with regulatory limitations and higher data rates - power usage will drop significantly.
With connected client (running AP) you get 3W - 4W power usage.
We are listing max consumption so you can calculate power draw for worst case scenarios for your solar/wind setups.
Don’t forget to look at these wishes; http://forum.mikrotik.com/t/rb780up-total-power-consumption-and-more-wishes/74037/1 
NetBox license level is 3 or 4? Product page says 3 and brochure says 4. Should be l4 as it is suggested as AP, but RB911 family traditionally has l3.
Article RB911G-5HPacD-NB seems isn’t correct since the device maintains USB at least.
Thx, that sounded uplifting towards the future of continued use of around 12v scenarios in the future.
So if I understand u correctly, it is possible that future products may be able to support broader range of voltages like 12-60v! And that would be a good compromise for most of my use-scenarios atleast, as long as the range starts at 12v, so RBs can still work directly off a 12v battery!
Concerning POE switches:
A POE switch with 8 or 8+ ports, that could handle 12-24-48v output, configurable on a PER PORT basis would be AWSOME for most tower applications(With Gigabit ofc now in the new ac age!) !
And/or if Mikrotik want to introduce more higher voltages in new products, maybe a POE switch that can be powered by 9-60v and deliver 12-24-48v out?(I dont even know if that is possible, I am just throwing outs some ideas here now! 
)
In any case, Keep up the good work Mikrotik! 
In connection with the earlier questions, explain:
Power -48V DC (sign - before the voltage means that the device ground has been linked to positive)
+24 V DC (+ sign in front of the voltage means that the device ground has been linked to negative)
If the unit / power supply device has galvanic isolation of the power is a sign does not matter. (electronics device is then galvanically isolated from the input power and there is no possibility of a short circuit)
However, if it does not have it by connecting +24 V to-48V power supply, eg we do short circuit.
If you do not have galvanic isolation if it gets shorted, then either strikes a fuse or burn some equipment (if the fuse does not exist)
-48V DC is a telecommunication standard (used in professional a power supply telecommunications operators which use eg GSM, xPON, all professional radiolines on licensed bands also use this standard power supply)
Also, if a new device RouterBoard have to supply 15-60V DC and galvanic isolation input power could be the total of each power supply, both +24 V and -48 without the use of additional DC converter.
Please confirm whether the new device will have galvanic isolation of the input power supply
So, this IS IMPORTANT!
Actually you are saying that in the case if MT routerboards and devices are not galvanic isolated from earth, and when with the new line of products with positive to ground becomes mixed with ‘old’ units that have negative to ground we are asking for problems in our installations?
What has MT to say about this?
[I’m coming from the world of car mechanics and marine industry and here its always negative to ground. So I am actually surprised to learn that there exists systems that work with “+” to ground. Now it makes sense I once came across a solar charger that had to be grounded to earth from “+” whereof most other solar chargers have “-” to earth.
It also gives me a clue why I have one tower that has an issue. For earthing all the radios it uses the same earth line in use by a ‘real’ telcon operator to earth their equipments. (probably +48V systems) where I considered it to be easy and safe to use their same earth cable for earthing all my MT stuff. After all, earth = earth?
On that install I still have one unit that I cannot earth. The moment I connect it to earth it makes all my other stuff go bananas… even an electrician could not tell me what happens… but my main rb1100AH starts to reboot the moment this unit on the roof is connected to earth…
Maybe I found my issue now?
Or would it make no difference if different systems use same earth. I mean, the 220V AC house network is basically connected to the same earth pole driven into the soil…, I believe?]
Seems you were not with cars for the time long enough to see the cars with positive pole on chassis. Anyway you are right. It is better to have all devices with the same grounding.
galvanic isolation solves all problems
If device has it then does not matter whether grounded is + or -
License level is 4 and Netbox doesn’t have USB
SXT ac does not have galvanic isolation and it supports only positive 48V. May be later we will add -48V support to some new products.
Ok, but do we know if MT routerboards are galvanic isolated? I don’t think so. I’ve had several instances in the past where an occasional touch of a plus wire to the casing of and board housing cause sparks or the routerboard to be rebooted…
I think this new voltage with the different earth side connection is very important to us all and to know how it really is… So if normis or any of MT can shine a light on this issue would be much appreciated…!
oeps, my post just crossed yours…
But anyway, shouldn’t it be mentioned now that these units can’t be used in earthed situations together with -12 or -24V situations. Or ru just happy the unaware user is burning his stuff and has to buy new?
Is there anything in the works for an NV2 equivalent of 802.11ac?
Actually this whole “-” or “+” earth issue brings a whole line of weird issues to the surface now..
I am having one installation were my tower is actually at the same building as telcons mobile phone antenna systems.
It’s there for years now, and I have even longer my tower at the same site with all kinds of MT antennas and devices.
Some two/three years ago I started to use shielded (ftp) ethernet cables to connect, and interconnect my devices which most of them were up to these days unearthed as well. Even my tower was unearthed for years and functioning fine.
But probably around the days of the introduction of ftp together with giga ports we were getting weird power related issues. So I ended up to earth all my antenna’s, all my indoor gateway routers (like a rb1100AH in a professional cabinet, all earthed) and even the 24V volt battery backup system (“-” to earth) to an earth ring line that was conveniently deployed by an telco while installing their stuff… 
But we actually never got rid of the weird issues and we found that several units better not be earthed or interconnected just to keep them running… I lost several boards in short cuts were we didn’t had a clue where they were coming from…
We even had qualified electrician look at the site, an ex radio engineer, but nobody had a clue…
In the end most boards were all connected same, where the antenna’s mostly are not connected to any earth. That was the only working way…
Until I red the post of HaQs I never knew anything about different type of connections to earth…
So now I think I have to separate my earth connections completely from the telcons earth and hopefully it solves my problems…
Why nobody else ever reported similar issue on this forum? Maybe because it is not very usual to have a tower location shared between wifi user and telco? Or the ones that do just happen to know? Or just were puzzled like me and never mentioned?
Anyway, I think it to be very irresponsible for MT if they now bring a line of product to the market that inherently will create issues if used in combination with their old and present line of products and they are going to be connected in a 'the book tell us to do so" type of manner (=all earthed). Users should at least be warned against probable issues!
hmm, Is it not? I don’t know, haven seen an ac unit yet in real. But ROS 6.17 should be ‘ac’-compatible. 6.17 on any other radio has NV2. Does your post mean the NV2 options are not available? Or do they just not work? Or is it inherent to the 8702.11ac protocol that tdma is not supported?
I am just anxious to know how the situation is. I was planning on buying some ac kit to deploy a new tower for a set of new clients. But if tdma is not working or available I am afraid that ac, even with its standard build in interference avoidances, still will suffer in a matter of years by all the other towers that probably are going to be converted into ac in the times to come…
I hated it to have to replace my units every so many years, so I’d rather wait until a product line is a bit more matured before I start to deploy.
Meaning at the same time I am walking behind the competition that asap push the new line of ubnt products in every corner of the country.
So yes, MT; tdma on ac? When? How? Or, why not?
As it is unnecessary in SXT
-48V power supply is used only in bigger base point
Also, this functionality has been greatly appreciated by 2-3 products:
CRS with more SFP fiber to aggregation NETMETALs fibers
in NETMETALs
maybe in QRTac
“Unnecessary in SXT”, because normally nobody connects these to ground… but what if someone now decides to follow manual and does connect it?
And what happens when ftp cable is used, that obviously has to be on ground. And if not, it still interconnects two boards. If the board is not galvanic isolated, and the other end isn’t neither but opposite ground, what than? Fireworks? Or just a bit of smoke…
The literature actually states that on both ends of the ftp cable both the equipments should be earthed to achieve 1Gb port status.
So, although SXT-ac might not really need to be earth connected to work, the moment you want to connect it with ftp cable to get the most out of the throughput you will have an issue…
I think this really needed to sort out properly otherwise MT is going to see a lot of comments coming their direction… 
Both NV2 and Nstreme are stated to work on ac products!
Product info from Routerboard.com:
SXT ac
The new AC standard is here, with up to 866Mbit over the air datarate, 256-QAM modulation, and 80MHz channels. 802.11ac opens up new possibilities and speeds never possible before.
The SXT ac is a new member in our 802.11ac product lineup, currently two models are available — with regular 28 degree antenna, and the SA model with a 90 wide beam- width sector antenna. Also supports 802.11a/n mode and is compatible with all legacy RouterBOARD devices, including Nstream and Nv2 protocols. Both devices come with Gigabit Ethernet.
http://routerboard.com/RBSXTG-5HPacD
When R11e AC is going to be available?