electrically speaking, the answer is Yes..
I don't thing Rackmount Devices have a wide Voltage-Ranges ,
So mesure the build-In Power-Supply to see what Voltage and Amps the Board wants...
--- Warnings ---
including but not limited to
- You will VOID any Mikrotik-Support / Garanties
- Voltage from Batteries, Solar-Panel or Main's can be hazardous (
- Any voltage fluctuation may translate to Performace degradation
- Any voltage or power fluctuation may also result in RouterOS crashes or Errors
- Don't forget to provide an adequate Battery Protection Circuit (over-discharge protection)