Is or was this a real product?
https://lantorg.com/products/mikrotik-netpower-lite-7r-css610-1gi-7r-2sout
There seems to be a battery terminal for UPS function on the picture but I only found the mUPS product which was actually sold:
https://mikrotik.com/product/mups
Should be observable in the wild 
https://cdr.pl/p7711,mikrotik-css610-1gi-7r-2s-out-netpower-lite-7r-switch-8x-ge-7x-poe-in-wejscie-2x-sfp.html
I’ve had many netPower Lite 7R units, but none of them ever had the battery terminals shown on the picture linked in the original post.
That product photo is CSS610-8P-2S+OUT
Is like the CSS610-8P-2S+IN with one outdoor enclosure.
And now there it is finally released:
Great to see LiFePO4 support, any chance it would also work with sodium-ion? Lower capacity but wider temperature range (important for outdoor use), wider voltage range from 1.5 to 3.95 V/cell (both good and bad - needs a better DC/DC converter, but easy to see the state of charge based on the voltage alone with no need for inaccurate charge counting).
Also, any chance it could also support 48 V reverse PoE? Easy to do technically (just diode-OR the power from the ports and the DC jack), even if just passive PoE (optionally on all 4 pairs for lower power loss on the cable) as proper 802.3at/bt on multiple ports would make things more complicated. I could have some uses for a Netpower Lite 7R with two PoE-out ports (6 PoE-in for customers also supplying power, one wireless uplink and one wireless AP/downlink).
Not to mention full RouterOS and 2.5Gb ports, just dreaming… or maybe the extra non-populated components on the CRS310-8G+2S+ board were meant for this?
There is no LiFePO4 support, it says it can charge that but that the battery itself has to include a BMS. So effectively it just supports constant-voltage charging.
When you have a battery with nominal 24V voltage that can be charged at fixed voltage, it will probably work. I don’t know why they call that “smart”, probably just the marketing term.
In the charger settings you can develop a custom profile to try and adjust to any battery chemistry. Currently, the maximum charge voltage can be set to 30V, which is too low for a completely full charge for sodium-ion (31.6V as a typical value), although a lower charge cut-off voltage can be beneficial for the batteries’ lifespan, same as Li-ion.
Float charging should also be disabled, same as for lithium-ion charge cycles.
If the BMS takes care of battery temperatures, the temperature override function & voltage offset parameters can be used to nudge the charge voltage slightly higher, close to the 31.7V maximum.
(In any case, you must make sure that you are handling the battery according to the manufacturer’s specifications)
2 Likes
What is the lowest discharge voltage limit when the battery is cut off? Na+ 8S can be discharged down to 12 V, the DC/DC converter (if still working) may lose efficiency at the end of the range (low voltage, high current) if not designed carefully. Supporting even lower voltages might make sense if the battery is close to the switch (and thick wires are used) for the simple reason that the cheapest (price per kWh) cells are the large ones (230-300 Ah range). Single cell probably not realistic, but 4S packs are quite popular.