Instruction Manual

Introduction
1–4 975-0400-01-01 Revision H
This manual is for use by qualified personnel only.
Charge Controlling
The solar charge controller can regulate PV array current for charging batteries at
12, 24, 36, 48, and 60 volts. It produces 60 amps of charging current and up to
3500 W (on 60-volt batteries) of charging power.
The solar charge controller controls how the batteries are charged by the DC
source (the PV array). It can be configured to use a two-stage (“No Float”) or
three-stage charging process.
When charging, the solar charge controller regulates the charging voltage and
current based on the amount of DC power available from the PV array and the
current state of charge of the battery.
The solar charge controller is able to charge a lower nominal-voltage battery from
a higher-nominal voltage array. For example, the solar charge controller can
charge a 12-volt battery from a 36-volt array. This gives flexibility to installers to
use longer wiring runs without compromising the efficiency of a higher-voltage
array.
The solar charge controller is not able to charge a higher-voltage battery from a
lower-voltage array.
Figure 1-3 PV Charge Controller
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Table 1 - 1 Battery to PV Array Voltages
Battery
System
Voltage
Minimum PV
Array Voltage
Maximum PV
Array Voltage
(Operating)
Minimum PV
Array Voltage
(Open Circuit)
12V 15V
140V 150V
24V
a
a.most common battery system voltage in PV and inverter systems
27V
36V 39V
48V
a
54V
60V 66V