USERS | SP PRO Operation
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Doc #OI0003 Part #004122 Rev 04 2010
Battery Charging Operation
The SP PRO battery charging system utilises the combined effect between renewable and grid/generator
charging. This combination allows minimum draw, even not at all, on grid or generator if other charge sources
such as renewable are meeting battery charge requirements.
The SP PRO continuously monitors all charging sources to recharge the battery in a five-stage cycle.
Each stage or Charging Mode is controlled by voltage, current and time settings. These settings are fully
configurable using SP LINK however should not require changing after initial installation unless some aspect
of the battery installation changes.
Each voltage setting is battery temperature compensated. The set values displayed do not change. See
Battery Temperature.
BATTERY CHARGING MODE.
Read the following with reference to the Battery Charging Cycle graph on the following page.
INITIAL
The SP PRO charges at the initial charging current until the battery voltage rises to the initial charge voltage, then holds
this voltage for the time you set before starting the Bulk stage. When in the Initial charge phase, the Initial/Bulk LED will
flash.
BULK
The SP PRO charges at the bulk charging current until the battery voltage rises to the bulk charge voltage, then holds this
voltage for the length of time you set, before starting the Absorption stage. In Bulk charge mode, the Initial/Bulk LED will
be steady ON.
ABSORB
In the Absorption charge phase the SP PRO will charge at the absorb charge current until the absorb charge voltage is
reached. Once voltage is reached, the SP PRO will carefully monitor the rate of change of the charge current as set in the
Absorb-Float transition setting.
When the Absorb-Float transition setting is met, the charge cycle will switch to Float and terminate an auto start generator
if connected. If programmed, an equalise charge cycle will now be performed. The Absorption LED will be steady on
when in the Absorption phase.
FLOAT
The SP PRO holds the battery voltage at the Float level and will provide up to the float current to maintain the float voltage.
The SP PRO will remain in this charge state until battery voltage falls below the Initial Return level. If the SP PRO is still
connected to an AC Source after 24hrs of Float, it will transition to the Long Term Float voltage. Long Term float voltage
will allow batteries to sit at a lower voltage level indefinitely.
EQUALISE
Periodically, the SP PRO performs an equalise charge in which the battery is held at a higher voltage for a period set in
the EQUALISE window. This equalise charge will make sure all battery cells are at the same level. This restores to full
charge any partially discharged cells in the battery bank.
The equalise LED will be steady when in equalise mode and will flash when an equalise is pending, that is the charger
will perform an equalise after float stage is next reached.
