SunSaver MPPT MODBUS Document

TriStar MPPT MODBUS Document v10
http://www.morningstarcorp.com 20/26 05 Dec 2011
Battery equalize voltage. Periodic equalization equalizes cell voltages, bubbles the electrolyte, and helps
prevent sulfation of the battery.
Set to zero to disable equalization
Et_eqcalendar
[57353][0xE008](days). days between eq cycles
Specify the number of days between equalizations. Equalizing on a calendar basis ensures proper
maintenance of batteries.
Et_eq_above
[57354][0xE009](seconds) equalize time limit above Vreg.
Equalization will timeout after the specified number of seconds above PWM regulation voltage. If the
battery is charged above absorption voltage but has not yet reached the equalization setting, this value
serves as a safety timeout to prevent partial equalizations for extended periods of time.
Et_eq_reg
[57355][0xE00A](seconds) equalize time limit at Veq
Equalization will stop after the specified number of seconds at the equalization setpoint voltage.
Et_batt_service
[57356][0xE00B](days) battery service reminder
Specifies the number of days between battery service reminders. Sets an alarm, prompting the user to
check batteries for water, health, etc. Clear the alarm with the pushbutton, meter, or MODBUS alarm
reset command.
EV_tempcomp
[57358][0xE00D](V/C). temperature compensation.
Battery chemistry changes with temperature. Temperature compensation coefficient specifies the
amount that regulation voltage will be shifted with temperature. 25ºC reference, the negative is implied
(write a positive value). 12V lead-acid battery temperature compensation is approximately 0.03 V/C
EV_hvd
[57359][0xE00E] High Voltage Disconnect @ 25ºC
Flag a fault/alarm if the battery voltage exceeds this setpoint. Also attempts to open the MOSFETs to
stop charging. Set to zero to disable HVD
EV_hvr
[57360][0xE00F](V) High Voltage Reconnect
The HVD fault/alarm will be cleared once the battery voltage drops below this setpoint.