
gpelectric.com | [page 13]
INSTALLATION
WARNING: Three or more series connected panels can produce voltages in excess of 60V DC which is considered
to be high voltage and an increased safety hazard.
To connect panels in series, connect the negative (-) plug of panel #1 to the positive (+) plug of the panel #2. See Figure4-A left.
PARALLEL CONNECTION:
Connecting the panels in parallel increases the current of the system, so the two panels produce double the current as compared to one
panel. It is recommended that reverse blocking diodes be used on the positive lead of each module connected in parallel to prevent
damage and unsafe conditions.
WARNING: If shading occurs without additional electronic components, such as a reverse blocking diode, the by-
pass diode inside the junction box may be damaged leading to further panel damage and unsafe conditions in-
cluding extreme temperatures.
WARNING: When panels are connected in parallel, currents are additive. Consequently, a system assembled from
photovoltaic panels can produce high amperage, which constitutes an increased hazard.
To connect panels in parallel, connect the positive (+) plug of panel #1 to the positive (+) plug panel #2 Connect the negative (-)
plug of panel #1 to the negative (-) plug of panel #2. See Figure 4-A Right. In this conguration, cable adapters will be needed.
4.2 REFRIGERATOR VENT ACCESS - OPTION 1
1. Locate the refrigerator vent on the roof of the RV. Remove vent
cover to gain access to the duct opening.
2. Drill a hole through the side of the vent (5/8” hole).
3. Remove any sharp edges from the hole.
4. Insert a rubber grommet (not included) into the hole.
5.
Insert the MC4 Positive and Negative Extension Cables through the
hole and carefully route it to the GP-RVC-30-MPPT Solar Charge
Controller. Be certain to leave enough slack to allow cable routing
from module to vent along the desired path.
6.
Use cable clamps with the #6 self-tapping screw and/or tie wraps
every few feet along RV roof and interior route to the GP-RVC-
30-MPPT Solar Charge Controller.
7.
Ensure all penetrations into the RV roof are watertight. Use an
appropriate sealant as recommended by your RV Dealer to seal
holes wherever necessary.
8. Replace vent cover.
4.3 REFRIGERATOR VENT ACCESS - OPTION 2
1. Locate the refrigerator vent on the roof of the RV. Remove the
vent cover to gain access to the duct opening.
2.
Thread MC4 Positive and Negative Extension Cables carefully
through the screen and into opening.
3. Enlarge screen grid hole if necessary.
4. Remove any sharp edges from the hole.
5. Avoid strapping the power cable to existing wire between the
module and the battery.
Allowing a few inches of space between the power cable
and existing wire will lessen the chance of voltage loss
through thermal conduction.
6.
Use cable clamps with the # 6 self-tapping screw and/or tie
wraps every few feet along the RV roof and interior route to
the GP-RVC-30-MPPT Solar Charge Controller.
7. Ensure all penetrations into the RV roof are watertight. Use an
appropriate sealant as recommended by your RV Dealer to seal
holes wherever necessary.
8. Replace vent cover.
FIGURE 4-B
RV Roof
Refrigerator
Vent Cover
Solar
Module
Cable Clamps
Caution: The drilled hole may have sharp
edges or burrs - REMOVE
Vent
Screen
RV Roof
Refrigerator
Vent Cover
Solar
Module
Cable Clamps
Caution: The vent screen may have sharp
edges or burrs.
FIGURE 4-C
RV Roof
Refrigerator
Vent Cover
Solar
Module
Cable Clamps
Caution: The drilled hole may have sharp
edges or burrs - REMOVE
Vent
Screen
RV Roof
Refrigerator
Vent Cover
Solar
Module
Cable Clamps
Caution: The vent screen may have sharp
edges or burrs.
Note