PV System
PV arrays work best when the sun’s rays shine ___________ to the cells because of the effect of tilt angle.
What is perpendicular?
Energy efficient appliances may cost __________ less efficient models; but the reduced operation expense more than offsets the upfront cost over the life of the equipment.
What is more than?
The unit of measure for current is the
What is ampere?
Shading greatly affects a PV array’s performance and as a general rule a PV array should be free of shade from ___________.
What is 9:00 am to 3:00 pm?
There are three main components to a wind turbine: the ___________, the alternator, and the tower.
What is rotor?
PV modules should be facing true ___________ for maximum efficiency.
What is South?
Electric water heaters supply domestic hot water and come in a remotely located tank type that supplies the hot water needs of an entire house or a ___________ type that is located near the fixture(s) it supplies.
What is Tankless?
One amp of current flowing for one hour is equal to one ___________.
What is amp-hour?
The northern hemisphere is tilted towards the sun from ___________ so there is more available solar energy in summer than winter.
What is June through August
Article ___ of the National Electrical Code covers solar photovoltaic systems.
What is 690?
Solar panels are connected together to form a PV ___________.
What is array?
A __________ can be set to lower the temperature inside the house at night while home owners are sleeping and when they are away during the day at work or school.
What is programmable thermostat?
Solar ___ is a measure of solar irradiance over a period of time, typically over the period of a single day.
What is insolation?
The maximum current output of a PV module under conditions of a circuit with no resistance is called the ___________.
What is short circuit current?
It is suggested that the tower height used in small wind turbine installations be no less than ____ feet.
What is 80?
A typical PV solar cell is about 4 inches across and produces about 1 watt of power in full sunlight at about ___________ volts DC.
What is .5?
Electric heat pump water heaters are more than __________ as efficient as electric resistance water heaters.
What is two times?
Fan power is measured in __________.
What is cubic feet per minute?
A ____________ system has no connection to the local electric utility’s grid system and is used when a home owner wants to be totally independent from the electric utility.
What is stand-alone?
Article ____ in the 2011 National Electrical Code covers small wind turbine systems.
What is 694?
A(n) _____________ regulates the battery voltage and makes sure that the PV system batteries (if used) are charged properly.
What is charge controller?
There are three features of exhaust fans to consider when selecting one: electrical efficiency, noise level, and
What is Power?
The rate at which an electrical load uses electrical energy or the rate at which electrical energy is produced is called _____________.
What is Power?
A(n)_____________ system is a system type that incorporates a gas or diesel powered generator along with a PV system.
What is hybrid?
Small wind turbine electric systems consist of one or more wind electric generators with individual systems up to and including __________ kW.
What is 100?