Ultimate Powerbox v2

Ultimate Powerbox v2 (UPBv2 in short) is the successor of our renowned Ultimate Powerbox. You asked for more features, we kept our promise:

A USB3.1 Hub has been added -you can switch on/off each USB port –, more power outputs, more dew heaters, α new stepper controller that can drive any stepper motor in the astronomy market as well as an expansion ports for future devices that will communicate with the UPBv2 Controller!

If you are tired of carrying multiple power packs and dealing with a mess of power and data cables, our Ultimate Powerbox v2, a sophisticated power control unit, is the “Ultimate” solution. Our idea is an enclosure that makes a sufficient number of amperes available.

No cables disturb the movements of the mount and the instrument, only the main power cord and one USB data cord is attached to the Ultimate Powerbox from which branch off the other cables powering all devices.

Ultimate Powerbox v2 quick glance:

  • 4 x 12V Smart Outputs,
  • 3 x PWM duty cycle channels for your Dew Heaters / Flatpanel / Fans
  • a USB3.1  SuperSpeed, 5 Gbit/s Industrial Grade Powered Hub that includes 4 x USB3.1 and 2 x USB2 available ports (6 USB ports in total)
  • a Unipolar / Bipolar Stepper Motor Controller (Can drive nearly any stepper motor in the astro-market)
  • a Variable / Software Configured 3-12V / Regulated Output of 3Amps
  • a 12V / always ON Output
  • Environmental & Power readings
  • In a compact size with plenty of features!

We strongly believe that if you own a remote observatory or you do advanced imaging you are going to love this device!

Power and Data Cable management

Solid Input Socket

A large and solid DC input socket ensures that power cable is always secured in place. Socket is selected to provide all the power you need without voltage drops

DC power cable is included in the package

More than 20A of total power

Controller has been designed to support up to 20 Amps of total input current.

* Please notice that Ultimate Powerbox v2 is not a powerbank. It requires an external power source (battery or PSU) to receive its power.

4 x 12V DC Power outlets for your equipment

Four powerful Smart Mosfet transistors provide “electric juice” to your precious equipment. Sophisticated short circuit and overload per port protections cut the power and report the incident into our software. Every Mosfet is capable to provide up to 7Amps of current.

Metal & good quality output sockets ensure that will provide all the juice you need and can secure in place your extension power cables

Built in Power Sensors

A precise voltmeter and an ampmeter (can measure up to 30A) measure and display in real time your power input. If the input is more than 14.5V the power is instantly cut off to protect your equipment.

Individual Current Meter per 12V port and Dew Heaters

Every 12V output and every Dew Heater Channel has an internal and independent digital current meter. You can view each port power consumption in the software.

Stand Alone Software

Our modern standalone software has a neat dark skin! Control all Ultimate Powerbox v2 features from this software. Receive metrics, View and zoom into graphs, name your outputs, tune every setting of your Ultimate Powerbox v2 quickly and easily.

Industrial 6 port powered USB3.1 SuperSpeed Hub

An industrial grade USB3.1 Hub controller ensures that this USB hub will work flawlessly from temperatures of -40°C to +80°C.

A neat feature is that each USB port can be switched ON/OFF individually by the software. A device was stuck and you had to replug the socket in the middle of a cold night? No problem! Just locate the port, click the ON /OFF switch in our software and you recycle the USB port . Simple as that!

At the back of the UPBv2 you can locate:

  • 4 x USB 3.1 Super Speed ports
  • 2 x USB 2 High Speed ports

Each USB port provides up to 2.5Amps. All USB ports include an electronic short circuit and overload electronic protection.

If you own an Intel M3/5 PC Stick which has a USB-C socket you will need a USB A -> USB-C “fast charging” cable that can provide 3Amps. Normal USB-C cables have an internal resistor which limits current to 2.2Amps and leads to PC Stick shutdown. 

Embedded Stepper Motor Controller

A stepper motor controller will precisely move your focuser. The controller drives a Pegasus Motor or any other stepper motor in the market (Unipolar or Bipolar) e.g. Rigel, Robofocus, Moonlight Motor.

Make sure you have the correct cable for your motor. Every manufacturer uses its own pinout. Contact us if you have any question for the type of your motor.

Supported Stepper Motors

Pegasus MFKRequired RJ45 to RJ45 common straight network cable
RobofocusRequires cable RJ45 to DB9
Check Documentation tab for pinout
MoonliteRequires cable RJ45 to DB9 (Robofocus Compliant Pinout)
Check Documentation tab for pinout
LakesideRequires cable RJ45 to DB9 (Robofocus Compliant Pinout)
Check Documentation tab for pinout
Starlight HSM 20,30,35Required custom pinout RJ45 to RJ45 cable.
Check Documentation tab for pinout
Starlight MSM 20,30,35Required RJ12 to RJ12 straight network cable
Check Documentation tab for pinout
Rigel nStepRequired RJ12 to RJ12 straight network cable
Check Documentation tab for pinout

Backlash compensation is already implemented in the firmware and can be enabled, tuned and disabled from the software. A fully ASCOM6 focuser driver is already available.

Three channel duty cycle PWM outputs

Three Pulse width modulation (PWM) outlets are capable to provide power to your “thirsty” Dew Heaters / Flatpanels or Telescope Fans. Eliminate the moisture that is fuzzing your equipment and destroying your clear nights. These outlets can be remotely tuned from your laptop using the supplied software.

A Variable & Voltage Regulated Output

One regulated output that can provide up to 3Amps of current is available. You can tune the output from 3 Volt to 12Volt and save this setting in controller’s memory. Every time UPBv2 boots the port will be tuned to the stored voltage setting,

Always ON – 12V Output

One unregulated 12V output can provide up to 8Amps. So, In addition with the Smart 4 x 12V outputs you have one more to connect additional equipment. This 12V output port stays always ON!

Expansion Port (EXT)

An RJ12 expansion port is available for future devices. Expansion Port allows the connectivity of current and future Pegasus Astro Products. Plugged devices can be controlled from UPB software (ASCOM /INDI / Standalone)

Auto Adjustment of PWM (Dew Outputs)

Firmware can auto adjust the PWM Outputs by consulting the environmental sensor Dew Point reading. Just click “Auto” and leave to Ultimate Powerbox v2 decide if it is time to switch on your dew heaters.

Notice: You can select which Dew Heater output is controller by the “Auto Dew” function.

ASCOM 6.4 fully supported

Ultimate powerbox fully supports ASCOM6. In combination with our main program which acts as a server you can use our latest ASCOM 6.4 supplied drivers to:

  • Control Stepper Motor (ASCOM Focuser)
  • Pass environmental settings to supported software (e.g Sequence Generator Pro / MaximDL )  (ASCOM ObservingConditions)
  • Switch ON or OFF all 12V outputs. (ASCOM Switches)
Above screenshot shows ASCOM Observing Conditions and Focus Driver in combination with Sequencer Generator Pro

INDI support (in progress)

Ultimate Powerbox v2 supports INDI. There are some functions that do not work yet but we’ll support them as soon as possible.
There are two different implementations that support Linux/OSX

External brackets support Losmandy / Vixen Plate attachment

We provide an optional pair of brackets to grab the Ultimate Powerbox device onto a Losmandy 3” or Vixen plate. Both brackets can be screwed on the side of the controller and grab on your telescope.

Led Indications for power and failure states

Led can blink in patterns to warn you regarding important power issues (e.g over or under voltage). Moreover light can be turned off using the software. Our led is very dim but in case you don’t like it on you can switch it off via the software.

Power Cables are included in the package

Four (4) power cable of DC 2.1mm to 2.1mm male (1m) are included in the package. Cables are thick enough to support up to 6Amps of current.

External Environmental Sensor

External temperature & relative humidity sensor is included in the package. Know exactly the environment conditions in your location.  Temperature, humidity and dew point measurements are displayed in the software.

Zoomable  and Exportable Graphs for Power and Environment values

Software logs all voltage, current, temperature and relative humidity readings. All these plots are zoomable and easily exportable in PNG image & CSV text format. Keep a full record of your night conditions.

Timer to shutdown outputs

Choose the time and start timer to shutdown output ports when you schedule it.

Memory persistence outputs on startup

You can easily define which output should turn ON during startup. The setting is stored in system’s EEPROM memory. A neat feature in case of a power failure.

USB3.1 Connectivity

Controller is always connected to the USB Hub (7th internal USB port). No extra cable needed. Just connect the USB Hub to your laptop and you are ready to go.

Reverse Polarity Protection

Ultimate Powerbox has been design with a reverse voltage polarity protection. It will definitely save your night if you accidentally connect the main power supply in reverse polarity!


A hardware watchdog resets the device if for any reason there is no response from the controller for two seconds. A neat feature in the unlikely event of a controller freeze – when you have a remote observatory and you need to be certain that everything works as expected.

Upgradable Firmware

Device is firmware upgradable to support future features and bug fixes.


Device and included sensor is covered by two years warranty

Compact Size and Lightweight

A blue anodised aluminium compact sized box enclose the controller board. Size is 12cm x 10cm x 3cm (4.72 inch x 4.06 inch x 1.2 inch). Weight is 400 grams (14.1 ounces).

Ultimate Powerbox (Losmandy Brackets and Pegasus Plate on top that hold an Intel NUC small factor PC
Ultimate Powerbox (Losmandy Brackets and Pegasus Plate on top that hold an Intel NUC small factor PC
Supply Voltage:12V-14V DC (Reverse Polarity Protected)
Power Input ConnectorXT60 Female
ConnectivityUSB3 – Type B USB Connector
4 x 12 OutputsMaximum Current 6.5A each.
2.1mm Center Positive
Sense/ Ampmeter in each port
Software: ON/OFF
3 Channel x 12 PWM OutputsMaximum Current 6.5A each,
Sense/ Ampmeter in each port
Blue Coloured RCA Connector,
Pulse Width Modulated (Suitable for Dew Heaters / Fans / Flatpanel)
Software: Duty Cycle % / OFF
1 x Variable OutputAdjustable via software. 3-12V / 3Amps
1 x Always ON 12V Output12V passthrough / Always ON / 8 Amps
Stock Sensor Input / EXT0-100% humidity readings with 2-5% accuracy
-40 to 80°C temperature readings ±0.5°C accuracy
AmpmeterMeasures 0 – 30A
VoltmeterMeasures 5 – 15V
Superspeed (USB3.1) Industrial 6 port powered HubIndustrial Grade: Temperature range -40°C to +80°C
4 x SuperSpeed (USB3.1) ports (backwards compatible with USB2)
2 x High Speed (USB2)  ports
USB Ports can be switched ON/OFF on demand via software (data + power)
Each USB port can deliver up to 2.2Amps
Stepper Motor ControllerUnipolar and Bipolar Stepper motors, max 2.4 Amps (1.2 Amps per phase) – RJ45 socket
DimensionsSize is 12cm x 10cm x 3cm (4.72 inch x 4.06 inch x 1.2 inch). Weight is 400 grams (14.1 ounces).
Ultimate Powerbox v2 enclosure
Temperature / Humidity Sensor
4 x Power DC 2.1 to 2.1 male cable (1m)
DC Cable (2m) to Cigarette Lighter Adapter (10A fused)
USB3 Cable Type B (1.8m)

Losmandy Brackets for UPBv2

This image has an empty alt attribute; its file name is image-6.png
A pair of brackets and screws to securely mount your Ultimate Powerbox v2 on a losmandy or Vixen plate / dovetail

Small Factor PC Base Plate for UPBv2

An anodised aluminium base plate to securely mount your small factor PC (e.g Intel NUC) on the UPBv2.

Power Supply Unit (12V / 10A) – XT60 Plug

Click here for details 

Battery Couplers

(Set UPBv2 variable Power Output to 8V and power on your DSLR / Mirrorless Camera)

*  We currently support the following Couplers

Sony Mirrorless Coupler Compatible With


FUJI Mirrorless Coupler NP-W126 Compatible With

HS30EXR HS33EXR HS50EXR X-A1 X-E1 X-E2 X-M1 X-Pro1 X-T1 X-T2

Nikon DSLR

EP-5A for ENEL14 Battery Coupler: Nikon D3100, D3200, D3300, D3400, D3500, D5100, D5200, D5300, D5500, D5600, Df DSLR

EP-5B for ENEL15 Battery Coupler: Nikon D7000, D7100, D7200, D850, D750, D7500, D810, D500, D800, D610, D600

Canon DR-E17

For Canon EOS M3, M5, M6, Rebel SL2, Rebel T6s, Rebel T6i, Rebel T7i, and 77D

Canon DR-E18

For Canon EOS Rebel T6s  / EOS Rebel T6i | 760D/750D

Canon DR–E5

Canon 450D Rebel XSi Canon Digital Rebel XS (digital) Canon Digital Rebel XSi Canon EOS 1000D Canon EOS 450D Canon EOS 500D Canon EOS Kiss F Canon EOS Kiss X2 Canon EOS Kiss X3 Canon EOS Rebel T1i

Canon DR-E6 (Canon leadership cameras)

Compatible with Canon 5D Mk II, 5D Mk III, 6D, 60D, 60Da, 7D, 70D

Canon DR-E8 (Canon medium range cameras)

Compatible with Canon EOS 700D, Canon EOS 650D, Canon EOS 600D, Canon EOS 550D.

Canon DR-E10 (Entry camera models)

Compatible with Canon EOS 1100D and 1200D.

Canon DR-400 (Older camera models)

Compatible with Canon 5D, 50D, 40D, 30D, 20D, 10D, D60, D30


Power Cable for Skywatcher EQ8 Mount

Power Cable for Skywatcher EQ6R / AZ-EQ6 Mount

Q: What kind of power supply do I need?

A:  We suggest to buy a good linear 12V / 10-20A branded power supply. Cheap units cause voltage drops on high load and ripple effect. This will cause issues and artefacts to your precious CCD Camera. You can also use a Lead Acid battery (12V-13.8V).

Q: What type of cable do I need to use for input?

A: If you are going to make a custom input cable please note that you need at least a AWG 17 cable. Make also sure that you do not exceed 2 meters (6.5 feet) to to reduce voltage drops.

Q: I would like to use the Ultimate Powerbox into my remote observatory. What if the device freezes for some reason?

A: We have good news for you. The device has a hardware watchdog and resets itself if the controller is not responsive after 2 seconds.

Q: My observatory is in a very cold place. Is there any issue with the electronics of the device?

A: All electronic components were selected to support temperature ranges from -40 to +80 °C. Moreover USB3.1 Hub controller is an industrial grade model which fully complies with this temperature range.

Q: I have a new feature request. Is it possible to implement it in the software / firmware.

A: Sure, we are here to listen our customers. Please contact us and tell us about your idea!

Q: What if I accidentally short-circuit an output?

A: Ultimate Powerbox has an internal protection for all outputs. In less that 5 milisecs it will cut off the power of this output and a warning message will be appeared at the software screen.

Q: What if I accidentally reverse polarity?

A: Ultimate Powerbox has an input reverse polarity protection. Device will not power on and of course will not allow any voltage to leak to outputs.

Q: What if I short-circuit a USB Hub port?

A: Device has a USB short-circuit / overcurrent protection per port. It will instantly isolate/disable the selected USB port. Just remove the USB device and replug it to bring it to life.

Q: I have a USB device which requires more power than a normal USB port.

A: Each USB port provides 2.1Amps of current. You will be fine 🙂

If you use an Intel M3/5 Stick which has a USB-C socket you will need a USB A -> USB-C “fast charging” cable that can provide 3Amps. Normal USB-C cables have an internal resistor which limits current to 2.2Amps and leads to PC Stick shutdown. 

Q: At the middle of the night humidity rises up. What can I do for my optics?

A: Enable auto-dew functionality. Device firmware will adjust the power of both Dew Heater outputs consulting the humidity / dew point levels that environmental sensor reports.

Q: Can I upgrade the firmware?

A: Of course, device is designed to support firmware upgrade for future features or bug fixes.

Q: Why don’t you place a mini PC inside the Ultimate Powerbox?

A: We really don’t support this idea. Why to buy something and pay noticeable amount of money for a mini PC that will be obsolete (in its specification) after 6-12 months? We suggest you to just get a compute stick, plug it in the 6th USB hub port to supply it with enough power juice and you have your tiny PC up and running! If you don’t like it after some time, buy another one with higher specs and lower price for sure! Check the user shots for an example of this approach!

Q: Does it support INDI

A: Yes 100%. There are two implementations. Indigo and native Indilib and support Windows/OSX/Linux.

  • http://www.indigo-astronomy.org/downloads.html
  • https://indilib.org/devices/auxiliary/pegasus-ultimate-power-box.html