Ultimate Powerbox

Check our new Ultimate Powerbox v2
(the successor of Ultimate Powerbox).

If you are tired of carrying multiple power packs and dealing with a mess of power and data cables, our Ultimate Powerbox, 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.

The Ultimate Powerbox provides:

  • 4 x 12V Smart Outputs,
  • 2 x PWM duty cycle channels for your Dew Heaters or Flatbox
  • a USB2 High Speed Industrial Powered Hub with 6 available ports
  • a Unipolar Stepper Motor Controller
  • Environmental & Power metrics
  • 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 gonna love this device!

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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 7A of current.

Built in Power Sensors

A precise voltmeter and an ampmeter (can measure up to 30A) measure and display in real time (200 measurements per second) your power input. If the input is more than 14.5V (new firmware allows up to 14.5V) the power is instantly cut off to protect your equipment.

Individual Current Meter per 12V port

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

More than 20A of total power

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

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

Stand Alone Software

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

Industrial 6 port powered USB2 High speed Hub

An industrial USB2 port chip ensures that this USB hub will work flawlessly from temperatures of -40°C to +80°C. A nice feature is that USB Hub can be turned ON/OFF by the software. Moreover, USB port No 6 never turns off and supports up to 3A of current. A very handy feature if you have a Compute Stick * and you want to get a 5V input power. All USB ports include a unique 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. Connect a Pegasus Unipolar Motor or another motor in the market e.g. Rigel, Robofocus, Moonlight Motor. Backlash compensation is already implemented in the firmware and can be enabled, tuned or disabled from the software. A fully ASCOM6 focuser driver is already available.

Two channel duty cycle PWM outputs

Two Pulse width modulation (PWM) outlets are capable to provide power to your “thirsty” Dew Heaters. No more moisture fuzzing your equipment and destroying your clear nights. These outlets can be remote controlled from your laptop using the supplied software.

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 decide if it is time to switch on your dew heaters.

ASCOM 6 Fully supported

Ultimate powerbox fully supports ASCOM6. In combination with our main program which acts as a server you can use our latest ASCOM 6.3 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)
Ultimate Powerbox ASCOM EnvironmentAbove screenshot shows ASCOM Observing Conditions and Focus Driver in combination with Sequencer Generator Pro

INDI Fully supported

Ultimate Powerbox fully supports INDI. 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 power cable of DC 2.1mm to 2.1mm male (1m) are included in the package.

Ultimate Powerbox

External Environmental Sensor

External one (1) meter temperature & relative humidity sensor is included in the package. Know exactly the environment conditions of 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.

USB2 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.

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).

* Watch the unboxing of UPB, its features  and a software review by Simplified Astro Channel at Youtube

Bundle your favourite computer with our Ultimate Powerbox

We don’t follow the idea to embed a computer in the UPB device. Our concept is to keep separately the power / environmental / stepper control and the PC hardware. After a year the PC specifications will be obsolete. Spend the extra money on a separate computer which you can upgrade after some time. Choose a “compute pc stick” or a “computer cube” that fits your needs and bundle it with our Ultimate Powerbox. Check the following image of what we have done in our roll off observatory.

Supply Voltage 12V DC (Reverse Polarity Protected)
Power Input Connector DC 2.5mm
Connectivity USB2 – Type B USB Connector
4 x 12 Outputs Maximum Current 7A each. 2.1mm Center Positive
Software: ON/OFF
2 Channel x 12 PWM Outputs Maximum Current 7A Each, Black Colored RCA Connector, Pulse Width Modulated (Suitable for Dew Heaters or Flatbox)Software: Duty Cycle % / OFF
1x Sensor Input Mini Stereo Socket, Connectivity with Environmental Sensor0-100% humidity readings with 2-5% accuracy
-40 to 80°C temperature readings ±0.5°C accuracy
Ampmeter Measures 0 – 30A
Voltmeter Measures 5 – 15V
High Speed (USB2) Industrial 7 port powered Hub Industrial Chip: Temperature range -40°C to +80°C
6 x High Speed (USB2) available ports
USB Hub can switch ON/OFF on demand (software command)
6th USB port can deliver up to 3Amps
Stepper Motor Controller Unipolar stepper motors, max 1.6 Amps (0.8 Amps per phase) – RJ45 socket
Dimensions 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 Controller
Temperature / Humidity Sensor
4 x Power DC 2.1 to 2.1 male cable (1m)
DC Cable (2m) to Cigarette Lighter Adapter (10A fused)
USB Cable Type B (3m)

  • Stepper Motor Cable RJ45 to DB9 (Compatible with Pegasus, Robofocus, Moonlite, Generic Unipolar Stepper Motors)

  • Pegasus Motor Focus Kit (Universal or SCT)

    • Geared Stepper, Step Angle 7.5, Deg 120, Gear Ration 1:120
    • Universal L Shaped Adapter or SCT Celestron Bracket
    • Coupler 5mm to 10mm with 3 grub screws
    • Pair of Black Aluminium Dovetail Brackets to attach the Ultimate Powerbox on your mount

  • USB cable converter to 8V DC with DSLR battery coupler

6th USB port provides 3Amps of current – Use this adapter with the battery coupler to power up your DSLR 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 D5100 D5200 D5300 D5500 DF P7000 P7100 P7200 P7700 P7800 D3500 

EP-5B for ENEL15 Battery Coupler: Nikon D800 D800E D610 D700 D7200 D7000

DR-E17 Compatible with:

For Canon EOS M3 Mirrorless

DR-E18 Compatible with:

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

DRE5 Compatible with:

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

DR-E6 (Canon leadership cameras)

Compatible with Canon 5D Mk II, 5D Mk III, 6D, 60D, 60Da, 7D, 70D, 80D

DR-E8 (Canon medium range cameras)

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

DR-E10 (Entry camera models)

Compatible with Canon EOS 1100D and 1200D.

DR-400 (Older camera models)

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


Power Cable for Skywatcher EQ6R / AZ-EQ6 Mount

Power Cable for Skywatcher EQ8 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 notice that you need at least a AWG 17 cable. Make also sure that you do not exceed 2-3 meters to to reduce voltage drops.

Q: I would like to use the Ultimate Powerbox to 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 microcontroller 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 USB2 Hub Chip is an industrial 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 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 plug another one to bring it to life.

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

A: No problem. The 6th port of the USB hub can support up to 3Amps of current. Plug it there and it will do the job.

Ultimate Powerbox 6th USB port can easily provide up to 3Amps current. 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 was 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