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.
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.
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.