Schneider Electric Owner's Guide

Operation
3–4 975-0560-01-01 G
Charge Stages
The charge stages displayed on the SCP are described in Table 3-3. The charge
states are displayed under State on the Meters screen.
State Charge stage. See Table 3-3 on page 3–4.
Aux Auxiliary output state. See Table 2-4 on page 2–11.
Thermal Derating Indicates whether the charge controller is derating output power due to high
operating temperatures. See Figure A-4 on page A–6.
Table 3-2 Normal operation information (Meters screen)
Display Description
Table 3-3 Charge stages
Text Description
Bulk Batteries are charging at the maximum current available from the charge controller.
If the charge controller shuts down because of low input PV voltage, then charging will
resume in bulk mode. This means the charge controller starts in bulk at the beginning of
every day, regardless of the battery voltage. If the batteries are fully charged, the bulk/
absorption cycle finishes after a short period and the charge controller transitions to float/
no float (depending on charge cycle configuration).
Absorb After transitioning from bulk mode, the charge controller holds the battery voltage at the
absorption voltage setting and the charge current gradually declines as the battery is
charged. The charge controller stops absorption charging when one of two conditions are
met, as described in “Absorption Stage” on page 1–4.
Float Battery voltage is held at the float voltage setting. When the battery voltage drops below the
ReCharge Volts setting for a cumulative period of one minute, a new bulk charge cycle
is triggered.
No Float The charge controller does not output any power during this stage. When the battery
voltage drops below the ReCharge Volts setting for a cumulative period of one minute, a
new bulk cycle is triggered.
Equalize A deliberate overcharge designed to return each battery cell to optimum condition by
reducing sulfation and stratification in the battery. An equalization charge lasts one hour.
Not
Charging
No charging is occurring because the input power from the PV array has fallen below the
minimum PV array operating voltage (as specified in “Electrical Specifications” on
page A–2).
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