## FAQ

- gallium arsenide
- germanium
- selenium
- cuprous oxide
- lead Telluride
- lead sulphide
- silicon carbide
- cadmium Telluride
- indium gallium arsenide nitride
- copper indium gallium selenium

- Is the system going to be Standalone or Grid Connected?
- Are you going to use standard AC or will DC doing?
- Are you using the system at night?

Presumably you will know this immediately. Then there are several other basic pieces of information you need to know or find out. Â

- How much energy do you use on a day to day basis? How many lights do you use? How many hours for each and every lamp. How many hours for every other piece of electrical equipment?
- How much sun do you get at your location?

To find out how much energy you use on a day to day basis, you can look at your grid utility power bills for the last year or two. An energy audit will enable you to track down where every watt goes. To find out how much sunlight you get at your location, consult any one of the several available members in this site. When you know if you are using the system at night, and how much energy you use daily, the question of review the storage capacity can be dealt with to ensure sufficient supply

- There is the matter of building codes; Ensuring that your power system is safe and meets municipal safety standards.
- There is the matter of regulations concerning connection to the electric grid.
- There are laws or regulations regarding
- There is issue of insurance, which relates to device testing and building codes.

Please contact MPIA; they will be able to advise you on the requirements and regulator issues

Term |
Measure |
Definition |

Newton | force | The force which will give 1 kilogram of mass an acceleration of 1 meter /second^2 |

dyne | force | 1/10^5 nektons |

joule | work | The work done when a force of 1 Newton acts through a distance of 1 meter. |

erg | work | 1/10^7 joules |

ampere | electric current | 1 ampere is a charge flow of 1 coulomb per second |

ampere | electric current | "that constant current which, if maintained in two straight parallel conductors in infinite length, of negligible circular cross section, and placed 1 meter apart in a vacuum, would produce between these conductors a force equal to 2x10^-7 Newton per meter of length." |

volt | electric potential | (joules per coulomb) The electromotive force required to drive a steady current of 1 ampere through a resistance of 1 ohm |

coulomb | electric charge | 1 coulomb is the charge carried across a surface by a steady current of 1 ampere in 1 second |

watt | power | 1 watt is 1 joule per second [Power is the rate of doing work.] |

watt-second | energy | 1 watt of power being used over the duration of 1 second [Energy is power over a period of time.] |

electron volt | electric potential | 1 electron volt is the kinetic energy gained by an electron traversing a 1 volt potential difference. |

amp-hour | energy | 1 amp-hour is 1 amp supplied at a given voltage by a battery for 1 hour |

x | y | z |

The SI, also known as the metric system, and sometimes the 'mks' system, has the following basic units:

- meter (length)
- kilogram (mass)
- second (time)
- ampere (electric current)
- Kelvin (thermodynamic temperature)
- mole (amount of substance)
- candela (luminous intensity)