Previously bill 500 to 600. Now average 250. Would have been better if I can use more panels but due to roof shape cannot.
ROI is 7 to 8 years unfortunately. Warranty 10 years. Not much savings but yes doing something for the environment.

Any good company in kuching?

Unfortunately my Solar journey ends here . Click the spoiler to see pictures.

As per whatsapp from the solar company engineering team, my roof structure cannot support the weight of the solar panels

"Kayu ni boleh pecah kalau kita drill, bila da masuk L + railing + panel , possibility utk kayu tu mengepak dan pecah tinggi tu".

This means im stuck with a rm700+ tnb bill every month from now on

700 bill.
That kind of roof means your house is heating up rapidly due to that kind of roof.

Suggestion
Look for quotes for roof renovation.

ROI should be below 5years. installer charged too high!
how many KW and how much?

Unfortunately my Solar journey ends here . Click the spoiler to see pictures.

As per whatsapp from the solar company engineering team, my roof structure cannot support the weight of the solar panels

"Kayu ni boleh pecah kalau kita drill, bila da masuk L + railing + panel , possibility utk kayu tu mengepak dan pecah tinggi tu".

This means im stuck with a rm700+ tnb bill every month from now on

Rm700 monthly bill, whats the main contribution? If it AC, suggest changing all to 5 stars inverter first.  It drop my monthly bill massively cz previously use old AC which are not efficient

700 bill.
That kind of roof means your house is heating up rapidly due to that kind of roof.

Suggestion
Look for quotes for roof renovation.

bro. from looks of it your house suffers from heat. try insulate it. change to PU metal roof helps a lot

All the 3 AC's are already inverter but they are running night and day , not 24 hours but during the hotter time of the day. Ive looked into the daily stats, on days that there's no one at home, idle consumption is 6kWh daily, normal day usage is 35kWh, and on days when I charge the EV (once every 4 days), daily consumption is 70kWh
Probably need to look into it already. But don't know where to start and who to look for. Later need to do more research

Can easily last 10 years solar panel if good brand.

If it takes 5 years to break even, good already.

the granny brick is rated 2.3kw... usually i think it charges lower around 1.8kw (my main wallbox is 7kw but i set it up for 5kw to reduce cable loss)

originally i was thinking a 1kwp grid tie or off grid for a 1hp aircon for day use... then i was thinking maybe i can use it to slow charge the ev... the ev can limit charging power but i can't remember how low it can go... I'll have to do some more testing to finalize kwp... grid tie will be easiest to supplement ac power...

my usual tnb bill is 250...ev adds 150... so a small system for the ev that i can diy i think will be more cost effective than going 5-7kwp nem for the whole house...

anyways... thank you for taking an interest...

I got two friends living at close vicinity with solar panels installed.

11.5kw and 6.4kw.

Both string inverter

April TNB bill shows 890kwh and 396kwh respectively

And this figure appear to be peak of what their system is producing.

Is this considered ok?

the granny brick is rated 2.3kw... usually i think it charges lower around 1.8kw (my main wallbox is 7kw but i set it up for 5kw to reduce cable loss)

originally i was thinking a 1kwp grid tie or off grid for a 1hp aircon for day use... then i was thinking maybe i can use it to slow charge the ev... the ev can limit charging power but i can't remember how low it can go... I'll have to do some more testing to finalize kwp... grid tie will be easiest to supplement ac power...

my usual tnb bill is 250...ev adds 150... so a small system for the ev that i can diy i think will be more cost effective than going 5-7kwp nem for the whole house...

anyways... thank you for taking an interest...

All the 3 AC's are already inverter but they are running night and day , not 24 hours but during the hotter time of the day. Ive looked into the daily stats, on days that there's no one at home, idle consumption is 6kWh daily, normal day usage is 35kWh, and on days when I charge the EV (once every 4 days), daily consumption is 70kWh
Probably need to look into it already. But don't know where to start and who to look for. Later need to do more research

I got a quotation from a contractor, estimated roi 2.7 years..seems like a good ROI

Perhaps you could install metal bracings anchored to main building's structure on top those existing metal roofing to support solar panels?

This is what i saw on some other house in my neighbourhood. But the solar company i asked about this and they refuse to recommend this method. Dont know why, they just said it wont work..

I got a quotation from a contractor, estimated roi 2.7 years..seems like a good ROI

That's why I asked you your about your original charger details. Your 1kW off grid cannot power it unless you mod it which is a big qustion mark!    Or maybe some crazy mat salleh already managed to do it?

ok... car can limit charging to 6A... so about 1.3kw... so definitely can work... or i can add more panel

so called "ev charger" is a pass through device basically a glorified switch talking to the car to start/stop only... and also limit max draws from the wall so it don't blow you fuse or burn down the house... they can usually work at lower power...