your roof design determine how your panel can be place
assuming you are the corner unit you already have 2 panel that doesnt face the sun orientation nicely at some point of the time which could impact performance

sun hour is merely calculation of total generated per month/number of days in that month/system size

well..i forgot to mention my sun travel assumption which is top-bottom but left-right if for sure.
but the 2 corner pieces are actually less generation for some period during early and late days to my understanding as the shine angle are not on all cell.

Bumbung if got leaking during rain can install ke panel?

not many hav 40k to spend on the stuffs. u def a t20.

Problem is the company that gives such warranty will continue to exist in the next 15 years or not? Else your warranty certificate just paperweight.

can you PM me the company that has long history?
what inverter brand?

All can even more.

EPF,5.5%  after 4 years 
Capital : 47K
Return : 8.75K
Total :- 55.74K

Solar after 4 years
Capital :0 k
Return :- 38400
Total:- 38400

Again you don't understand that for FD, capital doesn't change.

can I know which company solar ure using? after reading all 15 pages it seems worth to get solar as my bill is about 1k

not sure what is better for the environment, use less electricity or install tons of solar panels to accommodate ones outrages energy usage for residentials.

You are not using energy efficient AC. Switch all to 5 star energy rated AC.

It's about the accuracy of the ROI term.

If someone tells you FD ROI 15%
or Solar ROI 20%.
Which is a better investment?
From numbers alone Solar is a bigger number therefore it has better ROI right?
But that is not true. Why does FD ROI of 15% outperform Solar ROI of 20%?

Okay. What if this is the scenario.

Scenario a
Put 47k in fixed d

Earn interest

Everry month another fresh 800 pay to Tnb.

For 10 years

Scenario b

Put 47k in solar
Every month another fresh 800  put into fix d.

For 10 years.

Which one is more worthwhile. ?

thats exactly what i mentioned earlier where i calculated for 8 years period

I stand corrected, after looking at your post  I realise that  still need to pay TNB bill for EPF case which is not accounted for.

I made a separate post below.

so you paid advance electric bill for about 60 months.. each month x 800.

just hope after 58 month everything still functional..  if yes then you are gaining if not.. its just a advance payment of your 800 electric bill.

i'm using excel xirr formula for the internal return rates, assuming i paid all upfront, and have excess kWp to cover the loss of efficiency. the return is 27.16%.

1/1/2023 -18,000.00
31/1/2023  400.00
28/2/2023  400.00
31/3/2023  400.00
30/4/2023  400.00
31/5/2023  400.00
30/6/2023  400.00
31/7/2023  400.00
31/8/2023  400.00
30/9/2023  400.00
31/10/2023400.00
30/11/2023400.00
31/12/2023400.00
31/1/2024  400.00
29/2/2024  400.00
31/3/2024  400.00
30/4/2024  400.00
31/5/2024  400.00
30/6/2024  400.00
31/7/2024  400.00
31/8/2024  400.00
30/9/2024  400.00
31/10/2024400.00
30/11/2024400.00
31/12/2024400.00
31/1/2025  400.00
28/2/2025  400.00
31/3/2025  400.00
30/4/2025  400.00
31/5/2025  400.00
30/6/2025  400.00
31/7/2025  400.00
31/8/2025  400.00
30/9/2025  400.00
31/10/2025400.00
30/11/2025400.00
31/12/2025400.00
31/1/2026  400.00
28/2/2026  400.00
31/3/2026  400.00
30/4/2026  400.00
31/5/2026  400.00
30/6/2026  400.00
31/7/2026  400.00
31/8/2026  400.00
30/9/2026  400.00
31/10/2026400.00
30/11/2026400.00
31/12/2026400.00
31/1/2027  400.00
28/2/2027  400.00
31/3/2027  400.00
30/4/2027  400.00
31/5/2027  400.00
30/6/2027  400.00
31/7/2027  400.00
31/8/2027  400.00
30/9/2027  400.00
31/10/2027400.00
30/11/2027400.00
31/12/2027400.00
31/1/2028  400.00
29/2/2028  400.00
31/3/2028  400.00
30/4/2028  400.00
31/5/2028  400.00
30/6/2028  400.00
31/7/2028  400.00
31/8/2028  400.00
30/9/2028  400.00
31/10/2028400.00
30/11/2028400.00
31/12/2028400.00
31/1/2029  400.00
28/2/2029  400.00
31/3/2029  400.00
30/4/2029  400.00
31/5/2029  400.00
30/6/2029  400.00
31/7/2029  400.00
31/8/2029  400.00
30/9/2029  400.00
31/10/2029400.00
30/11/2029400.00
31/12/2029400.00
31/1/2030  400.00
28/2/2030  400.00
31/3/2030  400.00
30/4/2030  400.00
31/5/2030  400.00
30/6/2030  400.00
31/7/2030  400.00
31/8/2030  400.00
30/9/2030  400.00
31/10/2030400.00
30/11/2030400.00
31/12/2030400.00
31/1/2031  400.00
28/2/2031  400.00
31/3/2031  400.00
30/4/2031  400.00
31/5/2031  400.00
30/6/2031  400.00
31/7/2031  400.00
31/8/2031  400.00
30/9/2031  400.00
31/10/2031400.00
30/11/2031400.00
31/12/2031400.00
31/1/2032  400.00
29/2/2032  400.00
31/3/2032  400.00
30/4/2032  400.00
31/5/2032  400.00
30/6/2032  400.00
31/7/2032  400.00
31/8/2032  400.00
30/9/2032  400.00
31/10/2032400.00
30/11/2032400.00
31/12/2032400.00
27.16%