In reality are there three parts to this when as customers we see only one?
As customers we expect that in buying a solar PV system it is more like purchasing a car than a saucepan. IE we are purchasing an ongoing commitment with liability to the benefit of the manufacturer?
The seller however is simply contracting to supply and install some rooftop panels, an inverter and cabling to connect it all. Not that much different to an electrician first wiring a house or adding a swimming pool with pump and some lighting.
Since inverters come with a 5-10year warranty and the panels with 10/25 year warranties it leaves the impression that the supplier installer will be part of this for up to 25 years.
The reality is that the seller installer is not that much different to a local Betta Electrical franchisee who just sold you a new fancy electric wall oven or air conditioner including installation.
In either instance there is the possibility that the seller could go belly up the next day.
In either instance the installer is probably a third party electrical contractor.
As it appears to work now there are three parts to consider concerning warranty and support:
- What if the quality of the install are not acceptable or to standard?
- What if the supplied and installed item/s stop working as expected, a fault or failure. This might be early in the product life or later on?
- What if over time a fault develops that diminishes the performance of the installed item/s, prior to a reasonable lifetime for the item?
Does existing consumer law if it considers a solar PV system in the same way as a wall oven provide adequate consumer outcomes?
Alternately is consumer law not applicable in that way and the items supplied and installed covered in the same way a building extension or electrical contractors work might be? Eg to supply added lighting and say a pool pump? How adequate are these protections?
It would seem as @gordon and @meltam suggest that the question of warranty and support once a business closes is not unique. Which ever way you look at it.