just to share mine, 800kwh average monthly usage which is RM341 per tnb calculator. Installed a 7.6kwp system for around 28k, using huawei invertor which after NEM could install with its battery system of up to 15kw. Current bill average around rm40, but my petrol bill also went down a bit as I had a phev after solar installation.

No upfront cost but i took EPP for 24month. If the tariff increased in coming budget, then the ROI could be shorter or would be less affected. Main target is to get the bill to using only subsidize rate as i don't see a point to not utilize it, but on top of that I can utilize AC as needed esp. on hot days. Currently I have a 2.5hp running from 8pm - 6am daily.

Quoting from earlier comments, these are money need to be spent anyway to TNB, must as well do something to it and in future get a minor battery for backup in the event of power failure. So, if purely numbers it doesnt make sense, but i'm not good with finance

What is the huawei inverter specs?

Are they undersizing it.

Is May your highest yield with 766kwh? That is about 24.70kwh and 3.25 sun hour. 

I feel like ur system should have performed better.  Something wrong? At least 800 based on 30 days and average 3.5 sun hour.

Actually toward the end the supplier hinted to me they can install extra panel than allowed by TNB, under table stuff. I never ask further since not possible for my case.

I think the main point to be considered. Are u going to shift new house in the next 10-20 years? Is the upfront cost going to affect ur lifestyle. I definitely don't which the biggest reason i go all in for solar.
Hmm... why the need for battery when u already have NEM? How much the battery cost and how many panel? Can last for whole night?

What is the huawei inverter specs?

Are they undersizing it.

If you have 500 ringgit bill consistent, it’s very worth to venture to solar.  The general consensus is above 400 it’s super worth to install.

With the right system, roi is below 60 months with no upfront deposit whatsoever. And bill will drop to tm3.

Basically you are just channeling money paid to Tnb to buy a system that belongs to you. U still get to enjoy the electricity as as much as usual and only pay rm3 to Tnb.  Ur rm500 will go to ur system for about 60 months. After that alll free electricity.  If u don’t do solar, u will channel 120 months of rm500 to Tnb just to use and get nothing back.

solar panel in Malaysia cannot ROI.
by the time you ROI your money , your battery and panel will require replacement.
Your total investment is RM47,000
if each monthy you save Rm1,000, that is 47 months .. close to 4 years but your battery will degrade over time and solar panel efficiency is also reduced, you won't be saivng Rm1000 each month.
According to friends in Japan who frequently have earthquakes , they do suffer frequent power shutdown. Their solar panel is for emergency . not to save money.

install solar but no battery ? then install solar for sunny day use ?

roof angle i supposed as I'm facing east-west orientation, so in the morning rear is angle directly which make peak power but the front is facing to north rather than west which lowered the performance it seems.
my supplier said the same too on additional panel later, but my idea is to see when/what is available then. I see this a 15yr cycle so maybe that time got better gears to upgrade and incentive given.

NEM doesn't allow battery, but its mainly the idea for selco after NEM ends, not now to power the house. but currently i do have those smaller battery for camping use.
i manage to get the 9kwp one

Unker monthly bill rm80.

AC almost everyday max 2-4 hours

install solar but no battery ? then install solar for sunny day use ?

once smart meter installed, gg 

solar panel in Malaysia cannot ROI.
by the time you ROI your money , your battery and panel will require replacement.
Your total investment is RM47,000
if each monthy you save Rm1,000, that is 47 months .. close to 4 years but your battery will degrade over time and solar panel efficiency is also reduced, you won't be saivng Rm1000 each month.
According to friends in Japan who frequently have earthquakes , they do suffer frequent power shutdown. Their solar panel is for emergency . not to save money.

TS, mind sharing the city you installed solar panels?

Average sunny hours per day is 3.5 hours in klang valley area, if it can be 5 hours, it will be cheaper to install solar panels as less solar panels required

You mean your inverter is 9kwac? This spec pair with 7.6kwp seems unbelievable. 

Just heads up. You need to share the mode of the inverter.

Coz when you mention 9kwp inverter, I suspect you are getting the inverter that support up to 9kwp. But usually the kwac is around 6-7.

It’s best u can share the model. 

To be honest, if you roof has angles, should have gone for micro inverter. 

Yours come with optimizer?

i just reread the spec for sun2000-6ktl-m1, 9k kwp in, 6k out so i guess you r right on undersize inverter.
well, there is a lot of should have

Klang.

Klang.

So the idea of adding panel is actually pointless

And your yield is limited by the inverter. Not so much panel placement. 

Panel placement usually can’t do much because that’s something the roof you can’t simply change when u are using alll of it.

I hope your system comes with optimizer?

could be, but my roof angle and orientation means one string is not getting full sun shine for first half of the time, then second half of the day for the other string.
increasing panel means more area to have the inverter at 100%, but honestly i fell the added cost not viable.
i dont have my roof picture with me, but cant change the roof as you say

and yes, optimizer included