Spot a miner here

Although number 1, 2 and 3, but seems like you only ask 1 question at 3. No need to wait. You can just ask solar installer to quote you based on how much you want to offset. Try to ask several quotes to compare price.

12 kwp for single phase...

Yup... this is correct... my mistake about 12kw

Haha... I wish as well... in my dreams maybe.

Hmm... like buying any expensive furniture or appliances or car, just compare price lo.
You can ask for quotation from GSparx (TNB subsidiary) and then some other you search on facebook or google (Verdant, SOLS, Salarvest)
They will then explain details to you and will conduct a free visit.

Then only you choose based on their strong points or price lo.

How much savings you are looking for? Around RM200? Your ROI probably will take quit long, maybe more than 10 years.
Your purpose is to go green? if yes, then maybe ROI is not significant.

Please also consider to get quotation from other company. Only when compare other quotations, then you can know your package better as there maybe other factors that such quote is given during the sales representatives side visit.

Ya, comparing a few company then you probably know which company offer best. If for me, based on your quotation, I will go for PG as well. By the way, no quotation from GSPARX? But maybe theirs will be slightly more expensive anyway.

Yes, the technology behind micro inverter sound great where each panel can maximize its efficiently to max and not dependent on the lowest panel, but maybe it is best that if you can ask the contractor to show you the log of that system and compare to log of a string system.

Probably you will notice the difference in energy generated maybe very insignificant.... (I'm guessing though)
My explanation is that, the peak sun hour usually occurs in the high noon 11am to 3pm. During this time the sun is almost on top of your roof regardless of orientation, so micro inverter do very little to contribute during peak generation period (unless your system is so big that a cloud partially shading some of the panel)

Micro inverter system shine during the early morning or evening time, when the sun ray is slanted, but do noted that during that time generation is like in the 20% region or less... So the question then becomes is it worth to invest additional money (micro inverter system will be more expensive than normal inverter) to increase the performance of that 20%.

If same price then technology wise, yes, micro inverter is the way to go.
Do also check out about the brand, its app as well. I'm not into inverters much so not sure about it.

What about quotation from other companies that solely only do normal inverters. It is more or about the same price as well?

Then again, if the best price provided is about the same, all other factors is also merely about the same.
Then micro inverter technology is way superior.

Yup this is a very good advise. There is just too many company doing solar now.
There are many that have close shop or change hand/ change name.
Mind you that all the warranties is tie up to the installer company. So if the company no longer exist, so is your 10 years inverters warranty or 25 years solar performance warranty.

It all boils down to one's risk appetite. Besides, solar panels and inverters rarely spoil.
So if you are one of those that must get all warranty... then GSPARX (TnB subsidiary) is one of the better option.
If you do a lot of homework, then can choose those established solar company as well with more than 5 years in operation. A google on their facebook pages or hashtag or customer review will show about when they start their business
If you are ok that solar system last as long as you can get ROI in about 5 years, then the cheapest will do and usually this are the new companies. Because it it ain't broke in the first few months, it probably gonna last a few years at least.

Haha.. maybe you got me wrong, I never said that there are good. As a matter of fact, their price is often on the high side and their customer service.... hmm... well you know, just like TnB. But my highlight is that there certainly will be around to honor the warranty compare to other new companies that might come and go.

Haha... GSPARX is like the dinosaur in this industry. They have been around since the first Feed in Tariff. if GSPARX not safe then the whole solar industry or SEDA is in trouble. Well the nature of TnB business is Electricity and Grid, so in Peninsula they monopoly. Unless solar energy is no longer sustainable (Government stop NEM project) or TnB no longer do business in Electricity, else this subsidiary will always be there. That's how I feel but ya, different people different feeling.

Can I just check... for No.2 What is the inverter size?

So since the system is already up for 3 years. you manage to get the 530 and 700 savings monthly? Care to share with us your average savings or the average kwh generated?

Well just a simple google will land you with all the big company
https://topsolar.asia/blog/solar-companies-malaysia
https://getsolar.ai/blog/solar-companies-malaysia/

Then just fill up forms or give them a call to come survey and quote. It is free.

You can turn it on, it won't explore or anything, but it defeat the purpose because your meter will run irregularly from both the energy you generated and energy you consume. Worst case scenario is that your meter will be charged on both energy generated as well as consume while the best scenario is that you are charged based on energy you consume (assuming you use more that what you generate), if it still feed back to the grid as you generate more, your meter will still registered as consume.

So all in all... be patient.

That device is call a switch... but it stops both incoming and outgoing. there is no 1 way flow valve for AC.

Haha.. anyway it is not so simple even if TnB main is switch off. The inverter of the common PV system is not that capable in balancing the output load to general household appliances.
It is very good in maximizing the solar power generation though.
That's why it is either compliment by our TnB feed or a battery system

Imagine there is no TnB and battery to buffer. So if you suddenly turn on aircond or the refrigerator compressor kicks in, the extra power draw will dip the voltage and cause trip.
The opposite is suddenly the sun is much brighter, the additional current may spoil your appliances.

Hmm... I'm not sure if it is a build in function for the inverter because for Malaysia NEM, the inverter is place after the distribution board that connect to the meter. So the switching will be at the distribution board, not on the inverter. If the switching function is on the inverter, then it need to be place between meter and distribution board.

Yup, but anyway, as you mention not that it cannot be done, but it certainly not a DIY solution or general electrician work scope.
It need to be carefully calculated on the max and min load and also switching time.

Basically you measure the power of your house load and determine if there is a need to switch supplement from TNB feed. The cost of implementing this totally defeat the purpose of cost savings.

Interesting. I see... this is to condition so that the inverter matches the load... If load higher, take from TnB, if load lower, ask inverter to match.

I see so generally hybrid inverter comes with no export option. So one can turn on their solar even without NEM meter installed yet. Thanks for sharing

Efficiency as in sun hours? Pretty standard about 3 I guess.

Yes, don't worry what will happen in 10 /9 / or 8 years time.
Too many uncertainty. As long as get ROI in within 10 years then when NEM completes... Maybe its time to get new set of solar system (new government package, new inverter, new battery, new higher efficiency panel... etc), or already change house few times,

About 20% maybe.
But generally when looking at penal, it is not mentioned much about the efficiency. At least from my point of view.
It is more about the output of the panel 500W, 550W, 600W or 650W but then again the panel size is also slightly different.

Let say a 7kw system, so we have a 3 sun hour a day.
So it will generate about 7x3 = 21kwh a day. So in a month, it will generate 21*30=630kwh, and probably offset your electricity assuming 50sen per unit, by RM315.