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Old 03-09-2020, 04:52 PM   #21
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Anyone happen to have pics of their panel brackets Sikaflex coverage?
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2018 GT27Q, 73 nights 12,177 miles, 600W Solar - 110kWh, PD4655L, 6V Batteries, Blue Ox, 16" tires, 2019 F250 PSD
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2013 Casita SD17 89 nights 16,200 miles
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Old 03-11-2020, 08:43 AM   #22
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Chelsea , Maine
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Quote:
Originally Posted by Kalashnikov View Post
I thought the 3M tape did most of the heavy lifting in terms of adhesion.
I think so too. I put on just enough Sika flex to keep water off the 3M tape.

My Airstream sat in an open field through a Maine winter, with all of the associated warming, cooling, and snow load. Then we hauled it to Florida and back. The panels are still there.

I sold a cargo trailer, so I removed the 50W panel (mounted with 3M tape and minimal Sika flex). I had to really work at getting those mounting feet off.

I trust the tape.
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Old 03-11-2020, 08:09 PM   #23
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Step 4: Wire the panels


Finally got everything wired! I had to put new connectors on my MC4-SAE converters so they would mate with the panels.

A note on MC4: with the proper crimping tool these are joy to assemble! Make sure you have a few extra, they are not designed to come apart after they are put together.

Some panel wiring (later tied it all down with the stick-on zip ties)




Wiring at the Zamp combiner. The Zamp box comes with some kind of insulating 'goo' inside, it oozes out when you shove in a plug.


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Old 03-18-2020, 04:25 AM   #24
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Step 5: Wire it all over again!


So it turns out my PV prewire was faulty:
https://www.airforums.com/forums/f44...up-206348.html


After testing the system I was able to bypass the prewire and demonstrate that the rest of it worked normally. I would have to pull new wire after all!



Go through the fridge vent like most people? Dealing with the rooftop vent and having to pull the fridge seemed like a lot of work so I decided to go through the vent pipe instead.


The vent pipe looks innocent enough. I could have poked a hole in the mesh but decided to just drill a half inch hole in the side.






That didn't go very well! Turns out the white shell on the outside is a combination of several pieces: A very brittle "hat" which itself is made of at least two separate pieces, a lower flange (white) and an inner black pipe made of some oily plastic. It wasn't possible to drill a hole, the upper portion and flange shattered.






In for a penny, in for a pound...





I fashioned an extension using a 1.5" PVC pipe with a 0.5" T. Required some Dremel action.





The 'greasy' feeling plastic pipe at the bottom of the vent. This is _not_ ABS plastic like the pipe in the closet, it's something else. I ended up using Goop to mate my extension and also added a few small sheet metal screws around it. I kept the base of the flange, the white part attached to the AS roof.





Final assembly with my home made combiner box! I had to use a short piece of conduit since the 8awg wire I picked up locally wasn't "PV" wire and has miserable insulation. Stuck the combiner down with 3M tape and ran a bead of sika around it.






The vent looks very tidy IMO








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Old 03-18-2020, 04:29 AM   #25
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All done!!!!! The faulty PV prewire cost me probably 3 days of debugging, and finally another day to rewire the system. What a PITA. But... I'm sure I'll be the only one this happens to


600W of solar, ready for boondocking! Many thanks to Airmiles and others for helping me work through this.











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Old 03-18-2020, 07:45 AM   #26
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Well, that was an experience. This is why, IMHO, it is best to self install your system. Now Kalashnikov knows his system inside and out. If something breaks in the future, and it will, he will know exactly how to diagnose the problem and where the weak links are in the system. I too learned from his experience and will be better prepared to fix my system when it breaks and to help others diagnose their problems on AirForums. Thank you Kalashnikov for sharing the problems with your install. We all benefited from your efforts.
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2018 GT27Q, 73 nights 12,177 miles, 600W Solar - 110kWh, PD4655L, 6V Batteries, Blue Ox, 16" tires, 2019 F250 PSD
Sold: 2017 FC25FB, 316 nights 40,150 miles, Propride, 400W Solar - 200kWh in 216 days
2013 Casita SD17 89 nights 16,200 miles
(O+5200)
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