PV Ch. 7

A device that regulates battery charge by controlling the charging voltage and/or current from a DC power source, such as a PV array

The ratio of the increase in battery charge to the amount of charge applied to the battery

The ratio of applied charge to the resulting increase in battery charge. Can also refer to the condition of a fully charged battery continuing to receive a significant charging current

A charge cycle in which less charge is returned to a battery bank than what was withdrawn on discharge

The condition of a battery state of charge declining to the point where it can no longer supply discharge current at a sufficient voltage without damaging the battery

A charge controller that switches the charging current on and off for charge regulation

A charge controller that limits the charging current in a linear or gradual manner with high-speed switching or linear control

A charge controller that limits charging current to a battery system by short-circuiting the array

A charge controller that limits charging current to a battery system by open-circuiting the array

A charge controller that operates the array at its maximum power point under a range of operating conditions, as well as regulates battery charging

A charge controller that regulates charging current to a battery system by diverting excess power to an auxiliary load

 An auxiliary load that is not a critical system load, but is always availabe to utilize the full array power in a useful way to protect a battery from overcharge

A controller with advanced features for managing multiple energy sources

A charge Controller that counts the total amount of charge (in ampere-hours) into and out of a battery and regulates charging current based on a preset amount of overcharge

 A battery condition, commonly the voltage, at which a charge controller performs regulation or switching functions

The voltage that triggers the onset of battery charge regulation because it is the maximum voltage that a battery is allowed to reach under normal operating conditions

 The voltage at which an interrupting-type charge controller reconnects the array to the battery and resumes charging

The voltage difference between the voltage regulation setpoint and the array reconnect voltage setpoint

The voltage that triggers the disconnection of system loads to prevent battery overdischarge because it is the minimum voltage a battery is allowed to reach under normal operating conditions

The voltage at which a charge controller reconnects loads to the battery system

The voltage difference between the low-voltage disconnect (LVD) and load reconnect voltage (LRV) setpoints

A type of stand-alone PV system that uses no active control systems to protect the batter, except through careful design and component sizing