Solar Power Cube v17.10

This design employs a solar panel to drive a hydraulic pump. Here are the latest updates:

Sept 2017: Part selection complete for solar panel, electric motor, power unit (less drive belt and gears)

Power Cube Working Document: ["https://docs.google.com/spreadsheets/d/1KNVP2O3KogC6jyxMuRALWTxrYjyCJ4ChjeZsJVdqHsg/edit#gid=1"]

Specifications

Solar Panel

 Voltage: 36.1 VDC
 Amps: 7.76 A
 Watts: 280
 Cells: 72
 Dimensions: 77.4in (1,966mm) x 39.4in (1,000mm) x 2in (50mm)
 Weight: 57.3lb (26kg) 

DC Motor and Controller

 
 Power: 500 Watt
 Voltage: 36 VDC
 Amps Max: 17.8 
 Max RPM: 2500
 Reversible
 Brushes and permanent magnets
 Diameter: 4 1/4" 
 Body Length: 4"
 Shaft: 23mm x 11.9mm shaft (threaded)
 
 Controller: 3.25" x 2.5" x 1.5"
 Weight: 9 OZ

Hydraulic Power Unit

 
 Power 5 HP 3600 RPM
 Flow 2 GPM max.
 Pressure 2500 PSI max.
 Reservoir 1.1 gallons
 Shaft 1/2" dia. x 7/8" w/keyway
 Rotation CW
 Ports 3/8" NPT pressure
 Return 3/8" & 3/4" NPT
 Orientation Vertical
 Size 10" x 10" x 10"
 Shpg. 13 lbs.

Calculations

Power input / output

280 W / (746 W/HP) = 0.375 HP