Installation
EcoBoost MPPT Operator’s Manual
19
18
3.0
Per IEC 62109, minimum sizes for equipment copper
grounding wire are:
• EcoBoost MPPT-20
10 mm
2
• EcoBoost MPPT-30
10 mm
2
• EcoBoost MPPT-40
10 mm
2
OR, of the same, or greater, cross-sectional area as the PV
wires.
For safety, and effective lightning protection, it is
recommended, and may be required by code, that the
negative conductor of the charging system be properly
grounded. Do not connect the negative conductor to the
heatsink equipment grounding teminal.
STEP 4:
Battery Connections
-
see diagram below
Be sure that DIP switches 2 and 3 are set for 12 or 24V, as
described in Section 3.2
NOTE:
Before connecting the battery, measure the open-circuit
voltage. It must be over 10 volts to start the controller. If the
system voltage Settings Switches are set to Auto-detect, battery
voltage over 15.5V will be detected as a 24V nominal battery, and
the unit will charge accordingly. The 12/24V auto selection is only
done at start-up.
With the battery disconnect open, connect the battery (+)
and (-) wires from the battery to controller. DO NOT CLOSE
THE BREAKER AT THIS TIME.
15 cm
MAX.
BATTERY (-)
BATTERY (+)
+
-
(at battery
OR solar side,
but NOT both)
System Ground
12V / 24V
BATTERY
Fuse or breaker sizing
based on required wire
ampacity
STEP 5: Solar Connections
-
see diagram below
WARNING:
Shock Hazard
The solar PV array can produce open-circuit voltages
in excess of 120 Vdc when in sunlight. Verify that the
solar input breaker or disconnect has been opened
(disconnected) before installing the system wires.
With the solar disconnect open, connect the solar (PV) array
wires to the EcoBoost MPPT solar terminals. Use caution,
since the solar array will produce current whenever in
sunlight. A solar disconnnect is a convenient way to break
the PV connection when necessary. DO NOT CLOSE THE
BREAKER AT THIS TIME.
