3.0
Installation Instructions
ProStar MPPT Operator’s Manual
31
30
Figure 3-4. Ground Symbol
Per NEC 690.45 (A) and NEC Table 250.122, minimum sizes
for equipment copper grounding wire are:
• ProStar MPPT-25 10 AWG (5 mm
2
)
• ProStar MPPT-40 10 AWG (5 mm
2
)
Per IEC 62109, minimum sizes for equipment copper
grounding wire are:
• ProStar MPPT-25 7 AWG (10 mm
2
)
• ProStar MPPT-40 7 AWG (10 mm
2
)
OR, of the same, or greater, cross-sectional area as the PV
wires.
WARNING:
Risk of Fire
DO NOT bond system electrical negative to earth
ground at the controller. Per NEC requirements, system
negative must be bonded to earth ground through a
GFPD at only one point.
AVERTISSEMENT :
Risque d’incendie
NE LIEZ PAS le côté négatif du système à la mise à la
terre au niveau du contrôleur. Selon les exigences du
CNE, le côté négatif du système doit être mis à la terre
par un GFPD à un seul point.
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 grounding electrode
conductor (GEC) to the case ground terminal. The ProStar
MPPT does not have internal ground fault protection; but
where the NEC requires the use of a ground fault protec-
tion device (GFPD), the system electrical negative should be
bonded through a GFPD to earth ground at one (and only
one) point.
The grounding point may be located in the solar, or the
battery circuit. For system grounding electrode conductor
sizing requirements, refer to the NEC Section 690.47, or
applicable local regulations or code.
STEP 5:
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.
6 in (150 mm)
MAX.
BATTERY (-)
BATTERY (+)
+
-
30 or 50 Amp
Breaker - depending
on model
(at battery,
or solar side,
but NOT both)
System Ground
12V / 24V
BATTERY
