Installation
EcoBoost MPPT Operator’s Manual
17
16
3.0
STEP 1: Check Controller Limitations
Verify that the highest temperature compensated solar array
open-circuit voltage (Voc), and load current do not exceed
the ratings of the EcoBoost MPPT version being installed.
Multiple controllers can be installed in parallel on the same
battery bank to achieve greater total charging current. In
this type of system, each EcoBoost MPPT must have its
own solar array. The load terminals of multiple controllers
can only be wired together if the total load draw does
not exceed the nameplate current of the LOWEST rated
controller.
STEP 2:
Remote Temperature Sensor
WARNING:
Risk of Fire.
If no Remote Temperature Sensor (RTS) is connected,
use the EcoBoost MPPT within 3m (10 ft) of the batteries. Internal
Temperature Compensation will be used if the RTS is not
connected. Use of the RTS is strongly recommended.
All charging settings are based on 25°C (77°F). If the
battery temperature varies by 5°C, the charging setting
will change by 0.15 Volts for a 12 Volt battery. This is a
substantial change in the charging of the battery, and the
use of the
optional Remote Temperature Sensor (RTS) is recommended
to adjust charging to the actual battery temperature. The
RTS can be added at any time after the system has been
installed.
Connect the (+) and (-) RTS wires to the 2-position terminal
located below the DIP switches (see figure 3.3).
The RTS is supplied with 10 m of 22 AWG (0.34 mm
2
) cable.
There is no polarity, so either wire (+ or -) can be connected
to either screw terminal. The RTS cable may be pulled
through conduit along with the power wires. Tighten the
connector screws to 0.56 Nm of torque. Separate installa-
tion instructions are provided inside the RTS bag.
WARNING:
Equipment Damage
Never place the temperature sensor inside a battery cell.
Both the RTS and the battery will be damaged.
CAUTION:
The EcoBoost MPPT will use the local
temperature sensor for compensation if the RTS is not
used.
NOTE:
The RTS cable may be shortened if the
full length is not needed. Be sure to reinstall the ferrite
choke on the end of the RTS if a length of cable is removed.
This choke ensures compliance with electromagnetic emissions
standards.
STEP 3:
Grounding and Ground Fault Interruption
WARNING:
This unit is not provided with a GFDI device. This
charge controller must be used with an external GFDI
device as required by local regulations.
NOTE:
Depending on the country of installation, conductors
identified by the color green, or a combination
of green/yellow, shall only be used for earthing
conductors.
Use the M4 screw on the left side of the heatsink to attach
a grounding wire to the screw / heatsink, and connect the
wire to the earth ground. Also tie any dead metal to earth
ground.
WARNING:
Risk of Fire
DO NOT bond the DC system electrical negative to
the EcoBoost MPPT heatsink / earth ground. If local
regulations require the use of a GFDI, the system
negative must be bonded through the GFDI to earth
ground at only one point.
