SP LINK | Configuration Settings
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Doc #OI0005 Rev26 2020
INITIAL STAGE:
The purpose of the
INITIAL STAGE
of the charging process is to raise
the battery voltage quickly with a large charge current. In this section you set the
Voltage
you wish the batteries to reach, the
Current
you wish to charge at and the length of
Time
the batteries will stay at that voltage until the inverter moves to the next stage of the
charge cycle.
The current is expressed as a % of the maximum charge current. Using our previous
example if the maximum charge current was 90 amps and you wish to charge, in this
stage, at ~85 amps you would insert 95 in this area. i.e. 95% of 90 amps = 85.5 amps
BULK STAGE
is the part of the charge cycle where the majority of the charging takes
place. This is normally set at a higher
Voltage
than the initial stage but at a lower charge
Current
. The
Time
setting determines, once the Bulk
Voltage
is reached, how long the
batteries stay at this level until the inverter starts the next stage of the charge process.
Once again using our example if you wanted this stage to charge at ~80 amps you would
insert 90 as the setting because 90% of 90 amps is 81 amps. The time that the charge
stage would remain at this voltage would normally be set longer than in the initial stage.
ABSORPTION STAGE
is the part of the charge process that allows the batteries to
maximise the effect of the previous charge stages. This stage is normally set to a higher
Voltage
than the two previous stages but a lower charge
Current
The
Max Time
it would
remain in this stage is longer again than the previous stages.
This section has a further level of control in that it will also end this stage and transition
to Float if the change in current becomes less than the
Net Change
setting for a period
equal to the
Change Time
setting.
When “System SoC” shunt is configured (see Shunt Settings) then the
current measured by this shunt type is used for the change in
Net Charge
.
For example if you have set the absorption Voltage to 57.6 volts, the Current to 60%
(54 amps) and the Max Time to 120 minutes, then the battery will be charged at 54 A until
the battery voltage reaches 57.6 volts. At this point the battery charging stage will change
from Absorption into Float based on which of the following occurs first:
1. The rate of change in charge current is low. For example the battery bank capacity
is 900 Ah, Net Change is set to 1% and Change Time set to 30 minutes. Transition to
Float will occur when net battery charge current has not changed by more than 9 A in 30
minutes.
2. The Max Time has expired. This is the maximum time the charger will stay in the
Absorption stage after the battery voltage has reached the Voltage setting..
Summary of Contents for SP PRO 2i Series
Page 1: ...Instruction Manual for SP LINK Configuration and monitoring for SP PRO series 2i ...
Page 31: ...SP LINK Using SP LINK Doc OI0005 Rev26 2020 31 Blank Page ...
Page 91: ...SP LINK Performance Monitoring Doc OI0005 Rev26 2020 91 BLANK PAGE ...
Page 97: ...SP LINK Service Settings Doc OI0005 Rev26 2020 97 Blank Page ...
