SunSaver MODBUS Specifications

LED transition setpoint. Specifies the battery threshold voltage at which the LEDs will change from Red
to Yellow indication.
Emodbus _id
[57397][0xE034](). MODBUS ID
MODBUS address which uniquely identifies the controller on the MODBUS network.
Emeter _id
[57398][0xE035](). MeterBus ID
Address which uniquely identifies the controller on the Morningstar proprietary Meter Bus network.
Devices are daisy-chained on the Meter Bus network via the RJ-11 connections. Addresses are limited to
the range of 1-15
Warning: do not change this value unless necessary.
MPPT Settings
EVa_ref_fixed_init
[57399][0xE036](V). Array Voltage fixed target - initialize
Write a voltage value to this register to fix the Array input voltage to a specific value. If this register is a
non-zero value, the MPPT function of the controller will be disabled (sweeping and tracking are
disabled) and the array input will be fixed to the specified voltage. On start-up, the value in this register
is copied to the volatile RAM register 0x0039, which allows for real-time control of Va.
Supported in V08 firmware and later.
EVa_ref_fixed_pct_init
[57400][0xE037](%). Array Voltage percent of Voc voltage target - initialize
Write a value to this register to fix the Array input voltage to a percent of the Array open circuit voltage.
If this register is a non-zero value, the MPPT function of the controller will be disabled (sweeping and
tracking are disabled) and the array target voltage will be fixed to the specified % of array Voc. The
controller will perform periodic Voc checks and move the array voltage if needed to maintain the correct
% target. On start-up, the value in this register is copied to the volatile RAM register 0x003A, which
allows for real-time control of Va.
Supported in V08 firmware and later.
Note: if the Va_ref_fixed_init (0xE036) register is non-zero, it will override this setting.
Eic _lim
[57401][0xE038](A). Charge current limit.
Specify a battery current limit (up to 15 Amps).