What is the gap (in mm) underneath the solar panel with these brackets?

Can’t say exactly as caravan at dealers but from memory approximately 25mm

Can u bolts be used with these to fix to cross bars? What size please?

I purchased a 15W 4LED Solar lighting System and fell for the "con" that says most people buy the recommended Z mounting brackets. When they came they could not be used as they were suitable for mounting panels probably 8 times the size of mine [ 16"x10"] I contacted the Lighting System supplier and they said the brackets were "not actually supplied or recommended by them" but Amazon. Hope this helps in some way.

Would anyone happen to have the space between the mounting holes?

Yes on my installation I own the space between the mounting holes. Both front to back and laterally.

Are the self drilling screws secure enough for my campervan roof? the manufacturer recommend "well nuts" for "rv" roofs. do rvs have grp roofs?

The perfect solution mate is to get a roof rack (low profile) then attach them to that. You can then run the wires along the inside of the rails and zip tie them. This way they are hidden and very secure. Also this way you can remove them if needed without leaving any holes in the roof (if you sell the camper in the future). Any more questions feel free to message me happy to help.

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Renogy Solar Panel Mounting Bracket Holder 4 Pieces, for Mounting Solar Panel Roof Mount Z Bracket with Nuts and Screws for Motorhome, Boat, Roof, Wall and Off-Gird Roof Installation

Renogy Solar Panel Mounting Bracket Holder 4 Pieces, for Mounting Solar Panel Roof Mount Z Bracket with Nuts and Screws for Motorhome, Boat, Roof, Wall and Off-Gird Roof Installation

Product ID: 48270539

Details

Brand
Renogy
Colour
Silver
Item dimensions L x W x H
38.6 x 3.3 x
Item weight
104 g
Material
Aluminium

⚡Supports 50W-150W panels

🪶Lightweight aluminium build

🛠️Includes all nuts & screws

€ 24.93

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Description

🔋 Power your adventure with sleek, sturdy solar mounting!

VERSATILE MOUNTING - Perfect for RVs, boats, walls, and irregular surfaces—adapt your energy wherever you go.
COMPLETE MOUNTING KIT - Includes every fastener you need—no extra trips to the hardware store, just plug and play.
EFFORTLESS INSTALLATION - Pre-assembled bolts and washers make setup a breeze—get your solar system running fast.
DURABLE CORROSION FREE - Premium aluminium construction ensures long-lasting performance in all weather conditions.
OPTIMIZED FOR SMALL PANELS - Designed specifically for 50W to 150W solar panels, ideal for off-grid and mobile power solutions.

The Renogy Solar Panel Mounting Z Bracket Set includes 4 lightweight, corrosion-resistant aluminium brackets designed for easy installation of 50W to 150W solar panels on RVs, boats, walls, and irregular surfaces. Complete with all necessary nuts and screws, this kit streamlines off-grid solar setups with durable, versatile mounting solutions.

Specifications

ASIN	B00BR3KFKE
Best Sellers Rank	3,235 in Business, Industry & Science ( See Top 100 in Business, Industry & Science ) 4 in Solar Panel Roof Mounts
Brand	Renogy
Colour	Silver
Country of Origin	China
Customer Reviews	4.7 4.7 out of 5 stars (3,735)
Finish	Wooden
Global Trade Identification Number	00799475029035, 00816360021360
Included Components	Solar Panel Z Bracket
Item Depth	10.2 inches
Item Dimensions	38.6 x 3.3 x 25.9 centimetres
Item Type Name	Solar Panel Z Bracket
Item Weight	104 g
Manufacturer	Renogy
Material	Aluminium
Model Number	MTS-ZB
Mounting Type	Ceiling Mount
Part Number	MTS-ZB
Set Name	Renogy Solar Panel Mounting Z Bracket Set of 4
UPC	078433267567 799475029035 816360021360
Unit Count	1.0 count

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€ 24.93

Duties & taxes included

In stock

Sold byAmazon CroatiaDelivered 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 Croatia.

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