Few years ago, I heard that to install home solar panels, the minimum cost was well above RM20-30k, and the payback period was around 10 years.
I'm not sure how true was it as I didn't do further research.
Last year, I heard that the cost has dropped significantly to less than RM20k and it took less than 5 years to recoup the initial investment.
Now, it is almost "zero cost upfront" with instant return on investment.
It's just like in property investment when the developer gives 10% discount, free stamp duties/legal fees & DIBS so you don't need to pay anything before the VP, and then you rent out the property immediately with positive cashflow for 10 years.
Can you believe it?