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

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

🌧️Corrosion-free, weatherproof aluminum

🛠️16-piece complete mounting kit

$U2484

Duties & taxes included

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Sold byAmazon UruguayDelivered byDesertcartCustomer service byDesertcartReturns14 days · 30 with PRO

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Description

🔋 Mount Your Future: Secure, Sleek & Solar-Ready!

DURABILITY THAT LASTS - Anodized aluminum and stainless steel hardware ensure up to 25 years of rust-free, reliable solar panel support.
LIGHTWEIGHT YET STRONG - Premium lightweight aluminum construction offers easy handling without compromising on strength or stability.
ALL WEATHER PERFORMANCE - Designed to withstand rain, sun, and salt air—your solar setup stays secure and corrosion-free in any environment.
VERSATILE COMPATIBILITY - Perfectly engineered for RVs, boats, trailers, yachts, walls, and off-grid roofs—install your solar panels anywhere with confidence.
COMPLETE INSTALLATION KIT - Each set includes 16 Z brackets, bolts, flange nuts, and self-tapping screws—everything you need for a seamless setup.

SUNMAK’s 16-unit Z bracket set features anodized aluminum and stainless steel hardware, providing a durable, corrosion-resistant mounting solution for 50W to 150W solar panels. Ideal for RVs, boats, trailers, yachts, and off-grid walls, this lightweight, weatherproof kit includes all necessary bolts and screws for quick, reliable installation, backed by a 25-year service life and expert after-sales support.

Specifications

ASIN	B0BLGLRHZD
Best Sellers Rank	#10,435 in Patio, Lawn & Garden ( See Top 100 in Patio, Lawn & Garden ) #43 in Solar & Wind Power Parts & Accessories
Brand Name	SUNMAK
Color	Silver, White
Customer Reviews	4.7 4.7 out of 5 stars (878)
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
Manufacturer	Fujian Newsunpower Energy Tech Co., Ltd
Manufacturer Part Number	NSP-ALH-ZB-03-D16
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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TrustScore 4.5 | 7,300+ reviews

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Smooth transaction and product arrived in perfect condition.

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$U2484

Duties & taxes included

In stock

Sold byAmazon UruguayDelivered byDesertcartCustomer service byDesertcartReturns14 days · 30 with PRO

Buyer Protection · Full refund if your order doesn't arrive as described.

Desertcart purchases this item on your behalf and handles shipping, customs, and support to Uruguay.

Secure transaction

Trustpilot

TrustScore 4.5 | 7,300+ reviews

Meera L.

Smooth transaction and product arrived in perfect condition.

3 weeks ago

Farhan Q.

The delivery time was excellent, and the packaging was secure.

2 months ago

View all Trustpilot reviews