RV curved roof mounting...
840w Battery Backup array
Comments
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I'd use aluminum to shim between the panel frame (aluminum) and the Z bracket. I see no reason to have to use stainless shims.
2.1 Kw Suntech 175 mono, Classic 200, Trace SW 4024 ( 15 years old but brand new out of sealed factory box Jan. 2015), Bogart Tri-metric, 460 Ah. 24 volt LiFePo4 battery bank. Plenty of Baja Sea of Cortez sunshine.
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Be aware that stainless steel bolts and nuts can be an issue... Depending on the grade of SS, Stainless on Stainless threads tend gailing and binding (and lock, you will twist/snap the bolt before the threads give-way). Better to use Stainless and Brass, or Brass on Brass... If still using stainless sets, use anti-seize compound on the threads.
-BillNear San Francisco California: 3.5kWatt Grid Tied Solar power system+small backup genset -
Not to say that doesn't happen but from my experience I've found very few stainless bolts that have seized , probably less than 1% of the many thousands of bolts on old arrays I have dismantled. When they do, you definitely will end up snapping or having to muscle them to get them apart.
2.1 Kw Suntech 175 mono, Classic 200, Trace SW 4024 ( 15 years old but brand new out of sealed factory box Jan. 2015), Bogart Tri-metric, 460 Ah. 24 volt LiFePo4 battery bank. Plenty of Baja Sea of Cortez sunshine.
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Thank you for the reply's.littleharbor2: That makes sense. But exactly what would these shims, apparently designed to apply a tilt to match the roof curve, and maintain a solid connection look like? Are there washers that gradually become thicker across their diameter?BB: The panel mounting hardware is supplied with the Z Feet, but nothing that looks like a "shim".4.8kw Grid Tied Array
840w Battery Backup array640w camper array -
leveling washers:
Commonly called beveled washers, these are tapered to fit inside an I-beam's flange to provide a parallel bearing surface.
18-8 stainless steel washers have good chemical resistance and may be mildly magnetic.
Hot-dipped galvanized iron washers are corrosion resistant in wet environments.
Aluminum washers are lightweight and corrosion resistant in wet environments.
https://www.mcmaster.com/standard-washers
Powerfab top of pole PV mount | Listeroid 6/1 w/st5 gen head | XW6048 inverter/chgr | Iota 48V/15A charger | Morningstar 60A MPPT | 48V, 800A NiFe Battery (in series)| 15, Evergreen 205w "12V" PV array on pole | Midnight ePanel | Grundfos 10 SO5-9 with 3 wire Franklin Electric motor (1/2hp 240V 1ph ) on a timer for 3 hr noontime run - Runs off PV ||
|| Midnight Classic 200 | 10, Evergreen 200w in a 160VOC array ||
|| VEC1093 12V Charger | Maha C401 aa/aaa Charger | SureSine | Sunsaver MPPT 15A
solar: http://tinyurl.com/LMR-Solar
gen: http://tinyurl.com/LMR-Lister , -
Terry said:Thank you for the reply's.littleharbor2: That makes sense. But exactly what would these shims, apparently designed to apply a tilt to match the roof curve, and maintain a solid connection look like? Are there washers that gradually become thicker across their diameter?BB: The panel mounting hardware is supplied with the Z Feet, but nothing that looks like a "shim".
2.1 Kw Suntech 175 mono, Classic 200, Trace SW 4024 ( 15 years old but brand new out of sealed factory box Jan. 2015), Bogart Tri-metric, 460 Ah. 24 volt LiFePo4 battery bank. Plenty of Baja Sea of Cortez sunshine.
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I've used scrap bits of composite decking as shims. It's UV stable, doesn't corrode or rot, and is pretty easy to work with common woodworking tools.Off-grid.
Main daytime system ~4kw panels into 2xMNClassic150 370ah 48v bank 2xOutback 3548 inverter 120v + 240v autotransformer
Night system ~1kw panels into 1xMNClassic150 700ah 12v bank morningstar 300w inverter
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