1'st ; The Mikrotik mUPS is a discontinued product.
In my opinion, the 700 mA power limitations was nowhere enough to power any NetPower device or any multi-port POE-out devices with multiple devices getting POE power from a single mUPS.
2'nd ; I would like to see a mUPS version 2 product that is low cost and has power enough capacity to power one or more NetPower16P devices under full maximum load.
The parts list is simple and low cost.
- An external 24 or 48 volt power supply
- A mUPS plastic case ( same case as was used with the now discontinued mUPS
- A new board in the original mUPS plastic enclosure case
I attached a simple schematic with this post.
There is no voltage regulator.
It has two diodes and one current limiter.
It will work with 12 or 24 or 36 or 48 Volt DC power supplies.
External 12-Volt batteries can be connected in series to provide 24 Volts ( or 36 or 48 Volts )
Each diode drops .7 Volts ( all diodes have a .3 or a .7 Volt drop )
When running on utility power, the output voltage is .7 volts less than the DC input voltage to the mUPS-version-2
The batteries will charge to .7 volts less than the DC input voltage
When running on battery power ( no utility power ), the voltage out will be .7 volts less than the battery.
Hence - a 24 Volt DC power supply connected to the mUPS-version-2:
- Utility AC power is available , the DC output voltage is 23.3 Volts
- Battery power only ( no utility power ) , the DC output voltage is 22.6 Volts.
* Using SNMP on your Mikrotik, you can graph and monitor the actual voltage on your mUPS-version-2 battery system.
(( FYI - with the original mUPS system, there was no method available to remotely detect and remotely measure the remaining battery voltage )))
This is my schematic for a new mUPS-version-2 board to go into the original mUPS plastic case:
EDIT: Note - multiple mUPS-version-2 devices can be connected to the same battery system ( unlike the original mUPS )
EDIT: The only power limitations are diode-load-capability, Utility Power Supply capability - amps -and- battery output amps capability
EDIT: The use of two diodes in the design provides reverse polarity protection ( battery and/or power supply )