Outback Power Systems MATE3 Owners Manual - Manual (Page 107)

Charge Controller Settings
900-0117-01-00 Rev C 105
MPPT
The charge controller uses a maximum power point tracking (MPPT) algorithm which manipulates the
output of the PV array to harvest maximum wattage. Although this function is automatic, this menu
allows the user to adjust many of its parameters for special applications. See the charge controller
Owner’s Manual for more details on these parameters and their applications.
Figure 123 MPPT
Set Points:
 MPPT Mode – Selects between Auto (which allows
automatic MPPT) and U-Pick (which limits the maximum
power point tracking to a specified voltage).
 U-Pick VOC – Adjusts the maximum power point tracking
limit, as a percentage of the array’s open-circuit voltage (V
OC
).
 Wakeup VOC Change VDC – The controller monitors the
array V
OC
for a voltage increase sufficient for the controller to
leave Snooze mode and begin maximum power point
tracking. This setting adjusts the amount of voltage increase
for wakeup. (The charge controller Owner’s Manual refers to
this under the title “Wakeup Mode.”)
 Wakeup VOC Change Time – The controller monitors the
array V
OC
and amperage to see if they are maintained long
enough for the controller to leave Snooze mode and begin
MPP tracking. (The voltage level must be at least 0.3 Vdc
above battery voltage; the current level is controlled by the
Snooze Mode Amps set point.) This setting adjusts the
minimum time for wakeup. (The charge controller Owner’s
Manual refers to this under the title “Wakeup Mode.”)
 Snooze Mode Amps – Adjusts the required current level
detected by the controller during the wakeup time
(see previous item).
 MPP Range Minimum – Adjusts the lower limit of the
controller’s tracking algorithm. This can narrow the focus of
the initial MPPT process. The options are half the array’s V
OC
,
or the full V
OC
. (The Owner’s Manual refers to this under the
title “Mpp Range Limit %.”)
 MPP Range Maximum – Adjusts the upper limit of the
controller’s maximum power point tracking algorithm. The
options are 80%, 85%, 90%, and 99% of the array’s VOC. (The
Owner’s Manual refers to this under the title “Mpp Range
Limit %.”)