This should surely be regarded as an opportunity to install solar panels at low cost while stocks and production capacity still exist.
Mounts, connectors, wires, and inverters end up costing much more than the panels.
So how small a part of the total is the module cost? Even if you can only save 5% you still make more than 50% extra profit.
That means for a 10kW system I'm looking at $20k USD in Canada vs. $6600 USD in Australia. That's such a huge difference that 5-10% cost reduction in Canada would barely make a difference at all. I have serious doubts that any Canadian household could recoup the cost of a big solar install over the lifetime of the panels vs simply investing that money in ETFs.
Perhaps the situation is different in the US?