Congratulation, RM4k off the price

Actually regardless of on grid or off grid, one can still install and use own battery. The only special thing about NEM is that the meter and electric flows both way with the condition that TnB is on which let us offset (or sell) the excess electricity generated.

weather or not to change inverter when 10 years is up or to purchase battery supported inverter straight up will be based on personal preference though, nobody can tell, 10 years on how is the condition of the inverter. (one side is banking on that inverter continue to work and then there is no additional cost to support battery while the other is assuming that inverter may become spoilt or less efficient in 10 years and just about right time to change new onew.)

But regardless, definitely it is free electricity once ROI is mature in 5 to 6 years time

Sorry, can I ask about this solaris rebate.
So the solaris is bank into your TnB account? it is not offset as payment when you install your solar?

Oh.. I see, so it is bank to your bank account. Then it is good.
I thought it is deposit into TnB account as advance credit... then that is not good.

Thank you for the clarification.

Hmm... you sure that they quote you a 7.26 kw system can provide average monthly bill savings of RM415?
Sound a bit too much on the high side.
Based on my understanding, monthly bill saving should be around RM250 to RM350, so average should be RM300.
Maybe you can ask the seller to show you realtime data log of user installing their system and from previous month, you can gauge a better understanding.

Maybe should consider a slightly larger system? The saving is rather optimistically high. Or if possible ask the person to share system log data of those that have install similar system and check if can generate that much savings. The estimated sun hour is 3.3, but I think maybe 3 is more realistic.
8784/365 day/7.3kwp = 3.3
I am guessing you are using close to 1000 kwh per month? Just my opinion, I think 14 Panel of about 8.5 KWp system maybe better with higher capacity inverter as well.

I see, if bill of around 300, then is OK with such capacity.

Cause from your earlier quotation is:

Average Monthly TNB Bill Saving: RM 419
Recommended for current TNB Bill Amount: RM 498

As for the panel, I think it is quite reliable, will have same variation but should be in within range. Besides Peak sun hour is a variable itself to begin with so it is OK.

Just note that the sales agent who quote you RM419 savings for a 7+ kwp system is slightly too optimistic and I think does not reflect real world scenario.

Just different brand. To me not so important. The first quotation you share don't have inverter brand and capacity... but assuming is similar capacity. So my opinion is just get the cheaper one will do.

As for the average saving, it is reported abit on the high side... but that is just the general information in the quotation. Real live usage, the sun hour is about 3 per day, so monthly saving should be around RM480. But on another case, you didn't need your solar to cover 100% of your usage because the first 300 units are cheap.

OH... I failed to read between lines... it should not be label as solar PV model in the description though

low risk, no up front payment, low return lo... it all depend on how much you are wiling to put up front

Just my opinion, as there is other options so it is better to put them side by side for comparison and then decide which one is more suitable. Different people may have different preference. Base on the advantages you listed, let's compare them side by side
1. upfront payment
Rental: No upfront payment
Buy Over: Upfront payment or EPP with credit card up to 5 years
2. System ownership
Rental: getting the system for free after contract (But this system not able to sell back to TnB and not support battery operation, all in all may need to upgrade or change to newer inverter with battery)
Ownership: system is yours but NEM finished in 10 years
3. warranty
Rental: worry free during contract period
Ownership: Maintenance by owner but how often need maintenance, standard warranty to cover normal functionality of panel and inverter for at least 10 years
4. Green
Rental and ownership both is green.
5. Return
Rental: Some savings in electricity bills immediately, since there is no cost, but return maybe much lower in 10 years contract period
Ownership: ROI starts after 5 or 6 years, depends on capacity and return is much higher compare to rental over 10 years contract period.

So all in all, it all boils down to item 1 and 5. How willing for you to put up a certain amount of money upfront or in advance for EPP years. And with that how much return you can enjoy down the 10 years contract period

Oh based on my experience, the price can difference up to 20%. Capacity definitely is the main factor that determine the price. Inverter technology (hybrid, string, microinverter) is also affecting the price but maybe now to a lesser extend.
But I think the best is to get at least 3 or 4 companies to quote you. This is a free service so don't be ashamed to request for free site visit, explanation and quotation. No need to rush to sign up. Just communicate with the agent and then decide based on price and your preference after meeting up with the agent.

Just information sharing, I didn't go for the cheapest quotation either, instead I went with the one with a higher price but is more sincere in selling his service and answer to all my queries....

Your is a 7kw system?

By the way, your 4kw system is very amazing, the generation is very high.

Just rough calculation though, for a 10k investment if to break even 3 years. You will need a rebate of RM277 per month, your usage will be of 680kwh per month at least or higher.

Totally agree about not choosing the cheapest installer but the one that provide the best service.
The rule if to get multiple company to come quote and meet you and talk and ask question. Then from this process, we customer select the best one .... that we are most comfortable with. Not always the lowest price will be chosen, sometimes is more of how the sales person approach and sell their service and products.

Just to be fair, I won't be that quick to come to the conclusion that the company is bad through out although the sales do represent the company but maybe she is new
But I will said that a company that is good in KL, may not be that great in Penang... an installation team that is efficient in JB for a particular company not not be as efficient for installation team in another region....

But rules is that if anything happen, the first you contact will always goes back to the sales, so engage someone you are most comfortable with.

The solar panel is usually keep at 1.1 to 1.3 times of the inverter ratings. That is normal.
As for the capacity limit.... I think it is update

https://www.seda.gov.my/misc/frequently-ask...tering-nem-faq/

For domestic or residential consumers, the allowable maximum capacity of the PV system installed is 12 kWp for single phase system or 72 kWp for 3 phase system.

Correct, it means that 123kwh is directly consume during the day.


Yes it is correct. In the morning when your solar system generate electricity, it will first be consume by your appliances used during day time. These units is registered in your inverter but not registered to be exported to NEM meter. The extra will then be export and registered by NEM meter. So NEM meter will always have lower export value compare to inverter value.

Easier way is that you try to calculate in reserved to see if your usage make sense. For example previous month before solar, your usage is 600kwh, then after NEM, your export is 400 and your usage in your tnb bill is 450. So you will be paying for 50kwh. From your inverter the generation is 550. So in short. 150w is consume during the day. If you add up 450 from tnb and 150 difference from the missing inverter units. you should get about 600... which should be around your monthly tnb bill before solar installation.

But this type of back track calculation is only valid if there is no sudden increase of electricity usage. If you really want to monitor, then can install another meter to track total usage from both the solar and tnb.

Nope, it does not make sense at all. You can directly black list that agent as he don't seems to know what he is selling.
Try to keep the panel output to inverter capacity ratio between 1.1 to 1.3.
That will be the general guideline.

If you really need that much solar power, means that your usage is high and morning usage should be quite high as well. Why not get two inverter?
Even best, you don't need to go full NEM. 1 inverter to generate enough power for your day time usage, while the second to export out.
Just my thinking though, but of course cost is also increase but since you are getting such a high capacity > 15kw inverter, the price maybe is not too much different comparing to getting two 8 or 9kw inverter and you don't need to worry about unmatched solar generation and inverter capacity.

Oh that's very long, if still now done by end of this week, a month after your installation date, maybe you should write in to TnB and file complaint.