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
The sun’s height above the horizon is called ___________.
What is altitude?
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?
1000 watt-hours equal 1 ___________.
What is kWH?
The maximum current output of a PV module under conditions of a circuit with no resistance is called the ___________.
What is short circuit current?
The ___________ is the enclosure housing the alternator and other parts of a wind turbine.
What is nacelle?
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?
Solar ___________ is a measure of how much solar power is striking a specific location.
What is irradiance?
A(n) _____________ regulates the battery voltage and makes sure that the PV system batteries (if used) are charged properly.
What is charge controller?
The __________ of a house blocks air from moving between the inside of the house and the outside and holds the conditioned (heated or cooled) air in the house.
What is Air Barrier?
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?