Pre population of quote line items

Pre population of quote line items

Look to have a quote template for line items

Hi

I am trying to achieve the following. 

Our company sells different packages (composite items) 

A few line items quantity changes per client. 

I want to add a composite item to the quote but be able to change the quantities of each item. 

I don’t know how to complete this properly 

For example 

Package 1

Inverter 
Solar Panels 
Batteries 
Cable 


I want to prepopulate the quote with those items and then be able to change the quantity for the project.