The MPU90AH (Mobile Power Unit) is a custom made mobile station used to simultaneously supply power to all the equipment needed to control and drive an Equatorial Mount and other imaging devices.
Mechanical Design:
This Mobile Power Unit is built around of multiple Aluminum T-framing profiles for the mechanical structure and of acrylic sheets to cover the sides.
Two handles and a set of four wheels are used to transport and move the MPU around.
The unit is approximately 12″ x 12″ x 12″ plus handles and wheels.
Electrical Design:
As its name indicates the MPU90AH is built around a sealed deep cycle 90 AH 12 V battery. This battery is wired to four cigarette lighter outlets and one 110 V inverter with two outlets on the front panel.
A high Amp switch is used to power up the whole unit and is secured with a main fuse rated at 30 A. Each outlet also has its own 10 A fuse.
Both current and voltage are controlled with meters and a red LED conveniently shows when the unit is powered on.
The charger that I chose was a Power Tender Plus 5A which takes care of charging the battery and maintaining it to the proper voltage. I’ve installed the charging wires directly on the battery and wired the cable out of the case for easy access.
That is absolutely fantastic! I’m going to have to copy you!
Agreed. This is a thing of beauty. I am building nearly the same thing- might we see the inside layout as well? Where did you purchase these materials?
I never had the chance to re-open it up to take pictures yet. There is electrical power where I am imaging now and haven’t been using my power unit much lately. The box was built around the battery and the 110 V inverter. Other than these 2 parts there isn’t much inside. I use some white acrylic for the panels and 20 mm aluminum extrusions.