Deck 6: Batteries

Question 1

PV systems require batteries to discharge small to moderate amounts of current over longer periods of time and to be recharged under irregular conditions.

Answer 1

True

Question 2

____________________ charging is designed to produce consistency between all of the various cells in a battery bank.

Answer 2

Equalizing

Question 3

Absorption charging uses a high charging rate to bring a battery up to a state of charge of 80 to 90%.

Answer 3

False

Question 4

How can batteries be connected in a battery bank?

Question 5

A deep cycle battery is designed to be discharged until ____________________% of its capacity is used.

Question 6

In a stratified battery, why does performance diminish?

Question 7

What is the capacity in amp-hours of a battery that can deliver 2 amps for 50 hours?

Question 8

Gassing occurs during the discharge cycle of a battery.

Question 9

_____________________ is the condition where crystals of lead sulfate accumulate on the plates of a lead-acid battery reducing battery performance and making the battery difficult to charge.

Question 10

The ____________________ is the liquid conductor of electricity in a battery in which current flow takes place and is caused by the migration of charged articles called ions.

Question 11

The gradual reduction of the state of charge of a battery is called ___________________.

Question 12

Cutoff voltage is the minimum manufacturer specified battery voltage that still results in some usable battery capacity.

Question 13

The number of days that a battery bank can supply the electrical load without being recharged is called days of _____________________.

Question 14

Batteries used in a PV system need a charge controller to prevent over-charging and over-discharging.

Question 15

Name the three stages of battery charging.

Question 16

The ratio of the nominal battery ____________________ to the number of hours of battery discharge is the battery's discharge rate.

Question 17

How are liquid vented lead-acid batteries built?

Question 18

What are the two types of sealed batteries used in PV systems?

Question 19

Batteries used in a PV system are potentially the most ____________________ components in the system.

Question 20

Measuring the specific gravity of a battery's electrolyte with a(n) ____________________ is the most accurate way to test the state of charge.