Specifications

i
Table of Contents
1 Executive Summary ............................................................................................................................... 1
2 Definition .............................................................................................................................................. 2
2.1 Motivation .................................................................................................................................... 2
2.2 Goals and Objectives ..................................................................................................................... 3
2.2.1 Solar Power input .................................................................................................................. 4
2.2.2 Wind Power Input ................................................................................................................. 4
2.2.3 AC Power Output .................................................................................................................. 4
2.2.4 DC Power Output .................................................................................................................. 4
2.2.5 Simultaneous operation ........................................................................................................ 5
2.2.6 Efficiency ............................................................................................................................... 5
2.2.7 Modularity/Portability .......................................................................................................... 5
2.2.8 Electronics Enclosure ............................................................................................................ 5
2.2.9 Display ................................................................................................................................... 6
3 Requirements ........................................................................................................................................ 6
3.1 Input Power .................................................................................................................................. 6
3.2 Output Power................................................................................................................................ 6
3.3 Power Storage ............................................................................................................................... 7
3.4 Display ........................................................................................................................................... 7
3.5 Physical Requirements .................................................................................................................. 7
4 Research ................................................................................................................................................ 7
4.1 Hardware ...................................................................................................................................... 7
4.1.1 Batteries ................................................................................................................................ 8
4.1.2 Maximum Power Point Tracking ......................................................................................... 12
4.1.3 Charging Circuitry ................................................................................................................ 14
4.1.4 Power Inverters ................................................................................................................... 24
4.1.5 Wind Turbine ...................................................................................................................... 26
4.1.6 PV Cell Arrays ...................................................................................................................... 29
4.1.7 Power Calculation Sensors .................................................................................................. 33
4.1.8 Displays ............................................................................................................................... 35
4.1.9 Microcontrollers ................................................................................................................. 38
4.2 Software ...................................................................................................................................... 43
4.2.1 Power Usage Calculations ................................................................................................... 43
4.2.2 Battery Charge State Calculations ...................................................................................... 44