SunSaver MPPT MODBUS Document

TriStar MPPT MODBUS Document v10
http://www.morningstarcorp.com 19/26 05 Dec 2011
Charge Settings
EV_absorp
[57345][0xE000](V). Absorption voltage @ 25ºC.
The battery will charge at 100% charge current until battery voltage reaches this setpoint. The controller
will begin to taper input current so that this setpoint is maintained, but not exceeded.
EV_float
[57346][0xE001](V). Float voltage @ 25ºC
After Et_float seconds in absorption, when the battery is fully charged, the battery will transition to this
lower voltage charge setting to reduce gassing.
Set to zero to disable float stage
Et_absorp
[57347][0xE002](seconds) time before entering float
Defines the length of time in Absorption charge stage before transitioning to Float stage.
Et_absorp_ext
[57348][0xE003](seconds) time before entering float due to low battery
If the battery voltage discharges too low during the previous night, this value allows the user to specify a
longer period of time before entering float stage.
EV_absorp_ext
[57349][0xE004](V). Voltage that triggers absorption extension time
Battery voltage that will trigger a longer period of time (Et_absorp_ext) before entering float.
EV_float_cancel
[57350][0xE005](V). Battery voltage threshold to cancel float
A battery voltage threshold that will cancel float on the next charge cycle. If the battery discharged too
low the previous night, the user may want to cancel float for the next day.
Et_float_exit_cum
[57351][0xE006](V). Exit float timer
Specify (cumulative) amount of time below float voltage before exiting the float stage. Battery voltage
may drop below the target float voltage due to insufficient charge current or a system load draws more
current from the battery than the array can provide.
EV_eq
[57352][0xE007](V). Equalize voltage @ 25ºC