May 17 – 19 -- I’m working a boondoggle right
now. Our son decided he wanted a solar installation for his trailer, so I
offered to help. We had some long chats and decided they would be best served
by a portable panel since some of their favorite spots are shaded and the sun
angle is always low enough that panels need to be tilted to be efficient.
Like most current trailers, their unit came without
ANY 12 volt outlets. For someone using state parks or boondocking, 110 volt outlets
are a waste of time and energy, so we started the project by installing three
12 volts outlets. While I’ll gladly admit to being a molded fiberglass
aficionado, it was sure easy to mount new wires in a stick-built rig!
This project has been several months in the planning
which gave Jeff time to get all the bits and pieces ordered. We used #8 zip cord cabling from PowerWerx and Anderson Powerpole connectors for the feed from the panel.
The pass-through in the front of the trailer
provided all the access we needed for running the cables to and from the
controller. We picked up the positive feed to the battery at the battery cutoff
switch,
and ran the other three cables down and through the
floor in the corner.
After long discussions about the pros & cons of
various controllers, he decided to go with the Renogy Solar30 based on its adjustable charge point and the “good enough” theory. This one does a great
job of showing what the panel produces, and tracks battery voltage, but it is
NOT a battery monitor like the much more expensive TriMetric which I still
covet.
One of the Anderson connectors was bolted to the
trailer frame at the front street-side corner, providing a point for connecting
the extension cable from the panel. It is protected by a mud guard when not in
use.
I’m not a fan of portable systems because it seems
that storage for them is often an issue. In this case, the panel slides into a
simple mount in the top of the pass-through. Simple, easy, and out of the way.
The installation was easier than I’d anticipated. We
were done early enough that we took the family out to Eklutna Lake, one of
three campgrounds in the very large Chugach State Park, for initial testing.
This campground is pretty much a worse-case example for solar testing with lots
of tall trees to shade the panel.
With an initial positive test, we headed to the Kenai for
10 days of extended testing.