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Old 03-15-2019, 05:01 AM   #1
GSWatson
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Default Solar with Roof AC and MaxxAir?

I have a 2015 passenger to convert; it has the factory roof AC sitting smack in the middle of the roof. I would have preferred to not have the AC, but its what the GF ended up with. Shed like a MaxxAir in the rear of the van; I wondering what I can get away with for solar? Possibly 100w forward of the AC, and if I mount the MaxxAir to the side, another 100w running for and aft behind? Anyone had a similar situation? I tried a search but came up empty handed.


Cheers,
Greg
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Old 03-15-2019, 04:23 PM   #2
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Default Re: Solar with Roof AC and MaxxAir?

If you're trying for maximum wattage, you could also perhaps squeeze 50 watt panels (in parallel to minimize shading effects) beside the AC?

--dick
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((as always: this post may go through a couple of post-posting edits... so maybe give it ten minutes before commenting))
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Old 03-15-2019, 04:33 PM   #3
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Default Re: Solar with Roof AC and MaxxAir?

Ideally, how much wattage would you like to have?
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Old 03-15-2019, 05:25 PM   #4
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Default Re: Solar with Roof AC and MaxxAir?

Not much in terms of wattage; the van will be mostly camping in a driveway; it will be used to visit her soon-to-be-born grandchild, without having to move in with the parents. So there will be a shorepower charging inlet to handle most of the battery replenishment when not driving. But for off-grid camping, and future resale, Id like to have as much solar as is feasible without getting aesthetically obtrusive. Im most likely going with a CTEK Dual for dc-dc and solar because of simplicity (have it on my van and am happy), and so thinking of the newer compact/high efficiency 12v panels from Renogy and likely others.


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Greg
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Old 03-15-2019, 05:27 PM   #5
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Default Re: Solar with Roof AC and MaxxAir?

Quote:
Originally Posted by autostaretx View Post
If you're trying for maximum wattage, you could also perhaps squeeze 50 watt panels (in parallel to minimize shading effects) beside the AC?

--dick


Possibly - I remember that Kyocera made some long thin panels a while back.... With all the new Maker capacity happening, i wonder if someone could manufacture custom panels in custom shapes for a decent price...


Cheers,
Greg
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Old 03-15-2019, 06:16 PM   #6
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Default Re: Solar with Roof AC and MaxxAir?

144 or 170?

Om my 170 using the Renogy narrow panels I could squeeze in 460 watts with AC and MaxxFan. 19.5" wide panel in front, AC, 2 more panels in middle, Maxxfan, panel behind fan, two 30watt panels either side of fan.

Depends on where the factory AC lands.

Last edited by Shawn182; 03-15-2019 at 06:20 PM.
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Old 03-15-2019, 06:42 PM   #7
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Default Re: Solar with Roof AC and MaxxAir?

Quote:
Originally Posted by GSWatson View Post
Possibly - I remember that Kyocera made some long thin panels a while back.... With all the new Maker capacity happening, i wonder if someone could manufacture custom panels in custom shapes for a decent price...
I recently ran across a YouTube video showing (*) home-made construction of a "panel" from a box of rectangular cells. It's really just the cells, copper foil connecting strips, solder (carefully), epoxy to a backplane. Plus frame. On, yeah ... don't forget the bypass diodes. And the MC4 connector box (if you wish one).

Examples: https://youtu.be/6_3gK83bePQ
https://youtu.be/oyp98eYoaS4
https://youtu.be/BoM7KlyhOvg
https://youtu.be/KaA2zUwRHp0

This company will sell you individual cells, and "seconds": http://www.siliconsolar.com/
http://www.siliconsolar.com/shop/sol...c-solar-cells/
(by the pound and by the watt, too)((but at $2 per watt, they're really not competitive))

As it happens, i've built up much smaller panels (<2 watt) from cells. It can be a royal pain without the proper equipment.

--dick (who was quite happy to pay Grape Solar/Home Depot less than $100 each for 100 watt 36 cell rigid panels)
(*) a phrase which could be followed by the word "everything"
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2005 T1N 118" Freightliner 2500 Passenger Wagon (2.7L, 15" tires, standard (short) roof)
Get YOUR Sprinter's full configuration datacard by entering your VIN to https://www.datamb.com/
http://diysprinter.co.uk/reference <-- lots of service documentation, Thanks to Jens Moller and Arnie_Oli
((as always: this post may go through a couple of post-posting edits... so maybe give it ten minutes before commenting))

Last edited by autostaretx; 03-15-2019 at 07:02 PM.
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Old 03-15-2019, 08:44 PM   #8
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Default Re: Solar with Roof AC and MaxxAir?

Quote:
Originally Posted by GSWatson View Post
I have a 2015 passenger to convert; it has the factory roof AC sitting smack in the middle of the roof. I would have preferred to not have the AC, but its what the GF ended up with. Shed like a MaxxAir in the rear of the van; I wondering what I can get away with for solar? Possibly 100w forward of the AC, and if I mount the MaxxAir to the side, another 100w running for and aft behind? Anyone had a similar situation? I tried a search but came up empty handed.


Cheers,
Greg
Have you considered swapping the a/c for a maxxair in that location instead of rear? I believe Hein makes an adaptor and thatd free up space for solar.
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Old 03-15-2019, 09:15 PM   #9
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Default Re: Solar with Roof AC and MaxxAir?

I agree, Dick - not worth my time when I could just pay for something that s already together.

I could remove the AC unit; looking into that. If its possible to do that relatively easy, and is reversible for future re-installation, possible (though really, not sure why a conversion would want one later).


Cheers,
Greg
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Old 03-16-2019, 12:22 AM   #10
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Default Re: Solar with Roof AC and MaxxAir?

I'm in similar situation. We are adding a roof rack by Roambuilt which has cutout for AC and maxair fan and we will be putting 180 watts in front of the AC so we will still have a lot of roof space aft.
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