im not an expert, but i have looked into it, and decided not to proceed because of...i is poor.

1) if your house bill is above RM200 monthly, solar panel would really help, and is beneficial for you. if your bill is less, you wont see the return until AFTER the panels are dead, so forget it.

2) cost to install can be as low as 20k and as high as 50k. Say your bill is rm500 a month, meaning you need XX amount of kW capacity to be installed, hence more cost etc.

3) Since your house is linked to TNB, you need their "ok" for you to install and sell it back to them. hence they offer their own Solar Panel to you at a price/arrangement. they pay for the "project cost" and you repay them in X years, and your bill went from Rm500 a month to RM 10 a month. gitu la.

4) if you decide not to sell back to the TNB, you spend (say) RM50k, then your bill went from RM500 to RM10 a month, plus during rainy day you take some from TNB, your return of investment might be longer (15 years gitu). So better get TNB's "ok" for you to sell some when you are away from home (working) and generate electricity to be sold to the grid.

5) Now you might be thinking "but bro, aku kerja time ada matahari, kluar rumah time subuh, balik time maghrib, bila nak enjoy matahari punya hasil?" haaaaaa, thats the generating part, your spend RM500 on your bill, but sell RM490....if you dont want to sell to grid, spend a little more for a battery. but get this....MAHAL NAK MAMPOS. whatever you are spending on your solar panel, double that if you want to include battery storage.

Conclusion : you need TNB's ok, which is hard now because ada limit of seats, butttttttt.....if you use their subsidiary, they can give quotation and plan for you. Set aside RM50k max.

Understood, but what are the return value (in terms of ringgit) from the purchase may i ask?

I've run the numbers if i do a stand alone, (based on my bill), i will only see the positives from the saving after 20 years, since my electricity bill is less than rm150 monthly. so its not beneficial for me, unless TNB yg letak (pay for me) and they give me some electricity for free, and the rest they sell to the grid. but this is the real world, nothing is free. so i dont do it.