Small Scale Offgrid Solar PV: Installation Manual
- Ensure that no cable strands are left outside the terminals
- Completely tighten the terminal screws.
C. Lighting Circuit (12Vdc).
1. Install the main DC distribution line.
Once the client has specified where s/he wants the lights in or outside the house, the main
cable between the Regulator and the bulbs can be installed.
Choose the cable section according to the Quetsol Technical guide: Cable Selection in small
Offgrid Solar Energy Installations
2. Prepare the light bulb sockets.
The DC bulbs supplied by Quetsol have their positive connection in the middle of the threading,
with the negative contact on the side.
Positive in middle
Negative on the side
As a result the polarity of the bulb socket has to be:
Positive – middle connection
Negative – side connection
Bulb socket, right way up
Negative connection
Positive connection
Bulb socket, upside down
Positive in middle
Negative on side
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