MPC 1250, Operator'S Manual, Page: 28 / 44

Section IV Constant Current Model
006-0007207 MPC-1250DC Guide Rev F 28 of 44 03/03/2022 www.synqor.com
During Stage I, the battery charges with a Constant Current (CC). The MPC‑1250 can supply 47 A
in constant current mode. If no loads are active, the battery will charge with 47 A. If loads are
active, the battery charge current will be reduced by the load current.
Once the battery voltage reaches the user settable “top off” voltage (Vtop), the MPC transitions
to Stage II. In Stage II, the battery finishes charging at a Constant Voltage (CV). The MPC‑1250
default “top off” voltage is 29.4 V (Vtop). As the battery finishes charging, the charge current
decreases slowly until the “top off” time expires. The MPC‑1250 default top off time is 8 hours.
Once the user‑settable “top off” (Ttop) time has expired, the MPC transitions to phase III. In
phase III, the MPC is in normal operation. The output voltage is lowered to the user adjustable
nominal value (Vset). The default value for Vset is 28 V.
Setting CCCV parameters
The CCCV parameters discussed in the previous section can be set two different ways:
• Serial commands via RS‑232
• Web Page via Ethernet
The CCCV parameters can be set from the RS‑232 interface using the following commands. See
UPS User Commands document for details at:
(https://www.synqor.com/document-download?document=UPS_User_Commands.pdf
)
• SET TTOP x [sec]
• SET VNOM x [mV]
• SET VTOP x [mV]
Example: Change Vset to 27 V
SET VNOM 27000
The CCCV parameters can be adjusted via the CONTROL tab on the web page: