Your Questions About Solar Generators Portable

What are substitutes for Inverters?I would like to know the alternatives.Wat should worry Inverter business?

What poses threat to Inverter businesses?
Well I’m analyzing the inverter business and I want to look into substitutes which pose threat to the inverter business.

To make myself very clear.
For example the business was chicken industry then mutton,pork,beef and fish could be considered as substitutes..

@krk: u r right uninterrupted power supply is definitely a threat but I am looking into products.

how to instal a portable home gasoline operated backup generator through the main electric feed line?