9
GYSFLASH 20.12/24 PL
EN
Mode CHARGE Lithium (28.8 V/15 A max) :
Mode designed for the recharge of 24 V lithium batteries from 7 Ah to 240 Ah. 8 step automatic mainte
-
nance charge cycle.
Some Lithium batteries incorporate a UVP protection (Under Voltage Protection) which
disconnect the battery in case of deep discharge. This protection prevents the charger from
detecting the battery. In order for the Gysflash 20.12/24 PL to be able to charge the battery,
it is necessary to deactivate the UVP protection. To do this, select the Lithium charging mode
and press the button
for 10 seconds. The charger will then deactivate the UVP
protection and automatically start charging.
Charging current 7 / 15 / 20 A :
Selection designed to choose the most suited charging current based on the type and size of the battery
(lead-acid or lithium).
Charging current
7 A
15 A
20 A
Battery capacity
Pb
12 V
15
60 Ah
60
90 Ah
90
300 Ah
24 V
15
60 Ah
60
240 Ah
-
LFP
12 V
7
15 Ah
15
25 Ah
25
300 Ah
(21 45 Ah EqPb*) (45 75 Ah EqPb*)
(75 900 Ah EqPb*)
24 V
7
15 Ah
15
240 Ah
-
(21 45 Ah EqPb*) (45 690 Ah EqPb*)
*Lead battery corresponding : A lithium battery has a better starting performance (CCA) than a lead-acid battery. This is why some
lithium battery manufacturers indicate the battery lead equivalent (EqPb) corresponding to the capacity of a lead-acid battery with
the same starting performance. For instance, a LFP battery of 10 Ah will have the same starting performance as a lead-acid battery
of around 30 Ah.
• Lead-acid charging curve :
The GYSflash 20.12/24 PL features a 7 step charging curve designed to ensure optimal charging of lead-acid batteries.
U
I
1
2
3
4
5
6
7
Analysis
Recovery
Test
Desulfation
Charge
Absorption
Floating
charge
CHARGE
OK
Le
d
Max 12h
<1s
Max 5h
<1s
Max 20h
Max 8h
No limit
Step
1
: Analysis
Analyses the battery state (charge level, polarity inversion,
wrong battery…)
Step
5
: Charge
(
7 A - 15 A - 20 A /
7 A - 15 A)
Maximum current fast charge to reach 80% charge level.
Step
2
: Recovery
(
3 A - 5 A - 7 A /
3 A - 5 A)
Recovering damaged elements due to a prolonged deep
discharge.
Step
6
: Absorption
(
14.6 V /
29.2 V)
Constant voltage charge to reach 100% charge level.
Step
3
: Test
Sulfated battery test
Step
7
: Floating charge
(
13.6 V /
27.2 V)
Maintains battery charge level at its maximum.
Step
4
: Desulfation
(
15.8 V /
31.6 V)
Battery desulfation algorithm.
