Installation Guide

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Figure 8.1 Pair of Solar Y Branch Connectors
Figure 8.2 Two RNG-100D Panels in parallel
One of the most basic solar configurations involves wiring two solar panels in parallel. This
parallel configuration will increase the current output while the output voltage remains the same.
Fig. 8.2 above shows the arrangement for connecting two solar panels in parallel with one pair
of Solar Y Branch Connectors. This arrangement is applicable if two solar panels will be
mounted adjacent to one another. This connection requires
one (1) pair of Solar Y Branch
Connectors. When the panels are mounted at different locations- that is, separated by a
distance, the panels must be extended with Solar Connector Extension Cables (sold separately).
Remember to always use the recommended gauge size based on the
total array current.
Sizing the cable incorrectly may result in melting wires and/or fire.
CAUTION
8.1 Two adjacent panels in parallel (12V systems)
A parallel connection is achieved by joining all of the positive (+) and negative (-) nodes
together. When placing panels in parallel, it is recommended that the voltage levels are within
specification. In other words, the Vmp (maximum power voltage) of the panels must all be within
10% of each other. Typically, connecting panels in parallel is achieved through using
identical
panels. A simple way to place panels/strings in parallel is by using a branch connector, shown
in
Figure 8.1 .
Multiple panels/strings in parallel
To Charge Controller
+ -