Test 7 Flashcards
Overcharge is the ratio of applied charge to the resulting increase in battery charge.
True
Charge controllers protect batteries from over discharge by controlling discharging current.
True
Series charge controllers control charging current by short-circuiting the array.
False
A diversionary charge controller is a charge controller that regulates charging current to a battery system by diverting excess power to an auxiliary load.
True
The voltage regulation setpoint is the voltage at which a charge controller disconnects loads from the battery system.
False
Multistage charge controllers with an absorption charge cycle will also include a float charge setpoint, which is a lightly lower voltage than the voltage regulation setpoint.
True
In general, lower setpoints are required for the simpler interrupting-type charge controllers than for the more advanced controller algorithms.
False
A PV system can be configured to charge multiple separate battery banks with a single array.
True
A PWM charge controller pulses the full charge current and varies the width of the pulses to regulate the amount of charge current.
True
Applications with widely varying insolation or extreme temperature variations are generally not suitable for self-regulating systems.
True
____ is the ratio of the increase in battery charge to the amount of charge supplied to the battery.
Charge acceptance
____ is a charge cycle with an array current that fails to fully charge the battery system.
Deficit charge
A(n) ____ charge controller is a charge controller that switches the charging current ON and OFF for charge regulation.
interrupting-type
A ____ charge controller is a charge controller that limits charging current to a battery system by gradually increasing the resistance of a series element.
series-linear
A(n) ____ charge controller is a charge controller that counts the total amount of charge into and out of a battery and regulates charging current based on a preset amount of overcharge.
ampere-hour integrating
A charge controller ____ is a battery condition, commonly the voltage, at which a charge controller performs control or switching functions.
setpoint
____ affects battery charging characteristics, so some charge controllers automatically adjust setpoints to compensate for this factor.
temperature
____ is the condition of battery state of charge declining to the point where it can no longer supply discharge current without damaging the battery.
overdischarge
A charge control ____ is a programmed series of functions that a charge controller used to control current and/or voltage in order to maintain battery state of charge.
algorithm
A ___ load is an auxiliary load that is not critical system load, but is always available to utilize the full array power to protect a battery from overcharge.
diversion
A(n) ____ is a device that regulates battery charge by controlling the charging voltage and/or current from a DC power source, such as a PV array.
charge controller
The ____ setpoint is the maximum voltage that a charge controller allows a battery to reach under normal operating conditions.
voltage regulation
A(n) ___ charge controller is a charge controller that limits charging current to a battery system by gradually lowering the resistance of a shunt element.
shunt-linear
A(n) ____-system charge controller is a charge controller with advanced features for managing multiple energy sources.
hybrid
The ____ is the voltage difference between the voltage regulation setpoint and the array reconnect voltage setpoint.
voltage regulation hysteresis
____ is a controlled overcharge for a few hours.
Equalization
As charging current increases on the conductors between the charge controller and battery terminals, the voltage drop ____.
increases
A(n) ____ PV system is a type of stand-alone PV system that uses no active control systems to protect the battery, except through careful design and component sizing.
self-regulating
____ modules control current into a battery bank without a charge controller because their current automatically falls as the battery reaches full charge.
Low-voltage
A(n) ____ charge controller is a charge controller that limits charging current to a battery system by open-circuiting the array.
series