My father installed many years ago. Cost is constantly falling, so best for you to just call one of the many installers for a quote. He doesn't clean the panels, so dirt buildup has increased the power degradation. I suggest not to think of it in terms of dollars and cents because the difference is negligible. Best to think of it as doing your bit to save the environment by reducing your carbon footprint. If you got some spare cash lying around, then why not.

Brudder, now so cheap already ......

One vendor informed another package. Pay 30% and vendor will install the system at your home. Your bill discounted by 30%. Anytime want to buy over can be done. Haven’t got the details yet on this.

i've just finished installing it on end August with verdant solar, they settle everything from SEDA application to intallation for a 15 panel unit, total cost was 27k, last month 1 full month was able to cut down about RM 350 from usage

What we're thought, is that solar price will decrease and duration to ROI will decrease. This was correct, but the ROI heavily depended on the scheme provided by TNB. Last time, RM10~12k/kW now Rm4~5k/kW. Solar price did go down, but ROI was longer.

Moving forward, solar price will keep going down, or the technology gets better. Electricity tariff heavily depends on cost of fuel, and subsidy. Right now, fuel subsidy and electricity subsidy is going to cut. Biggest question will be, what is the NEM to discount ratio? The economics of solar will 'self balance' between solar vendors pricing vs TNB scheme. Otherwise, everybody will rush to installing solar and we end up like Australia.

In short, I foresee ROI will maintain between 7~10 years no matter the solar technology or pricing, unless something distruptive comes along.

MGM

So, example, if I drive 10k km per year.
That's RM2050 petrol, vs RM1230 electricity.
Savings is RM820 in petrol per year.

Depending on what else wanna factor in from the car maintenance vs EV maintenance... oil change, engine parts, major service every 50/100k km, also, petrol subsidy might be going away... the ROI calculation gets interesting push towards adopting solar and EV

The consumption also varies by car, I'm sure, just don't have the numbers
the savings formula should be simple, such as RM8 savings per 100km

Unrealistically speaking, if use the EV and drives 100k km per year (274km daily), the minimum savings is RM8k per year. That's almost ROI for a 2kW system.