Go Power GP-BMK-50 User Manual

[page 24] | gpelectric.com
6.1 PEUKERT’S FORMULA: BATTERY CAPACITY &
DISCHARGE RATE
The value which can be adjusted in Peukert’s formula is the exponent n: see the formula below.
In the GP-BMK-50, Peukert’s exponent can be adjusted from 1.00 to 1.50. The higher the Peukert exponent the
faster the e󰀨ective capacity ‘shrinks’ with increasing discharge rate. An ideal (theoretical) battery has a Peukert
Exponent of 1.00 and has a xed capacity; regardless of the size of the discharge current. The default setting for
the Peukert exponent is 1.25. This is an acceptable average value for most lead acid batteries. Peukert’s equation
is stated below:
log t
2
- log t
1
Cp = 1
n
· t where Peukert’s exponent n = log I
1
- log I
2
The battery specications needed for calculation of the Peukert exponent are the rated battery capacity (usually
Parameter Description
The deepest discharge in Ah.
The lowest battery voltage.
The highest battery voltage.
The number of days since the last full charge.
The number of automatic synchronisations
The number of low voltage alarms.
The number of high voltage alarms.
The lowest auxiliary battery voltage.
The highest auxiliary battery voltage.
Average discharge depth
The largest value recorded for Ah consumed since
the last synchronisation.
The number of charge cycles. A charge cycle is counted
every time the state of charge drops below 65% then
rises above 90%.
The number of full discharges. A full discharge is counted
when the state of charge reaches 0%.
The total amount of energy drawn from the battery
in (k)Wh.
The total amount of energy absorbed the battery in
(k)Wh.
The cumulative number of Amp hours drawn from the
battery.
6. MORE ABOUT PEUKERT’S
FORMULA & MIDPOINT MONITORING

Go Power GP-BMK-50 Specifications

General

Brand	Go Power
Model	GP-BMK-50
Category	Monitor
Language	English