Will these work with Unistrut or superstrut rails from Home Depot?

Yes 1/4" hardware or you can drill out for larger holes

What is the distance between the 2 holes? Is there a U-bolt size that will fit the 2 holes to mount the panel on a car roof rack?

From center to center, 3 and 5/32 inches. 1/4 inch diameter holes. I don't know about the U-bolts, but some U-bolts I have would fit, they are from antenna riggings.

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16 Units per Set Solar Panel Mounting Z Brackets, Solar Panel Mounting Brackets Lightweight Aluminum Corrosion-Free for RVs, Trailers, Boats, Yachts, Wall and Other Off Gird Roof

16 Units per Set Solar Panel Mounting Z Brackets, Solar Panel Mounting Brackets Lightweight Aluminum Corrosion-Free for RVs, Trailers, Boats, Yachts, Wall and Other Off Gird Roof

Product ID: 505913967

Details

Brand
SUNMAK
Color
Silver White
Item Weight
0.97 kg
Item dimensions L x W x H
3.94 x 2.48 x
Material
Anodized

⚡Supports 50W-150W solar panels

🌧️25-year corrosion-free durability

🛠️16-piece complete mounting kit

Rp1247757

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Sold byAmazon IndonesiaDelivered byDesertcartCustomer service byDesertcartReturns14 days · 30 with PRO

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Description

🔋 Mount Your Future with Confidence — Power Up Anywhere, Anytime!

LONG TERM RELIABILITY - Crafted for a 25-year lifespan, these brackets keep your solar investment safe and stable for decades.
EFFORTLESS SOLAR SETUP - Lightweight anodized aluminum brackets make installation a breeze without compromising strength.
VERSATILE COMPATIBILITY - Perfectly engineered for RVs, boats, trailers, yachts, walls, and off-grid roofs—wherever your solar journey takes you.
COMPLETE MOUNTING SOLUTION - Each set includes 16 brackets, bolts, nuts, and screws—everything you need for a flawless install.
BUILT TO BRAVE THE ELEMENTS - Rustproof and corrosion-resistant design ensures your panels stay secure through rain, sun, and storms.

SUNMAK’s 16-unit Solar Panel Mounting Z Bracket set features anodized aluminum construction with stainless steel hardware, designed to securely mount 50W-150W solar panels on diverse surfaces like RVs, boats, and walls. Lightweight yet corrosion-resistant, these brackets promise up to 25 years of durable, weatherproof performance, backed by a complete hardware kit and expert after-sales support.

Specifications

ASIN	B0BLGLRHZD
Best Sellers Rank	#8,198 in Patio, Lawn & Garden ( See Top 100 in Patio, Lawn & Garden ) #31 in Solar & Wind Power Parts & Accessories
Brand	SUNMAK
Brand Name	SUNMAK
Color	Silver, White
Customer Reviews	4.7 out of 5 stars 899 Reviews
Finish Type	Anodized, likely matte or brushed
Finish Types	Anodized, likely matte or brushed
Global Trade Identification Number	00196852037254
Item Depth	0.0625 inches
Item Dimensions	3.94 x 2.48 x 1.7 inches
Item Type Name	Z Bracket
Item Weight	0.97 kg
Item dimensions L x W x H	3.94 x 2.48 x 1.7 inches
Manufacturer	Fujian Newsunpower Energy Tech Co., Ltd
Manufacturer Part Number	NSP-ALH-ZB-03-D16
Material	Anodized Aluminum
Material Type	Anodized Aluminum
Model Number	NSP-ALH-ZB-03-D16
Mounting Type	Wall Mount
UPC	196852037254
Unit Count	16 Count

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