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 Home solar 4 months in.

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yeapsc73
post Jul 14 2025, 10:30 AM

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QUOTE(yeapsc73 @ Jul 13 2025, 02:09 PM)
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Wtf is penyelarasan insentif ?

Meaning NEM can't enjoy EEI?

I put import 650 export 650 come out like this
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QUOTE(razr_sped @ Jul 14 2025, 10:09 AM)
there is a cost to use the grid as in the more it load in the less incentive you are getting back,
i guess many new users overspec their system, when i spec mine my target is to reduce to i only pay the subsidize rate only since its national benefit instead of the thinking of my future bill should be 0
the calculator doesnt allow export > import, as my previous month is on work travelling my export is 559 but import is 376, so the calculator still calculate E = I as u can see the figure auto lower upon finishing typing
i suppose the high variance in day night impact the traditional power generation efficiency, thus this high difference of Export vs Import is not prefered by the grid which brings in the "penalty"
i guess we all have to wait and see
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if you look carefully for 650kwh E = I, there will be negative bill if EEI not discounted
yeapsc73
post Jul 14 2025, 01:27 PM

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QUOTE(LaiN87 @ Jul 14 2025, 11:11 AM)
I don’t see it as cost to use the grid at first. Because if it’s cost to use the grid, when someone have 600kWh import and 600kWh export, the bill will be minimal.

I see it as EEI = energy efficiency initiative. When someone use 1000kWh, regardless if take 900kWh from solar / NEM offset, it just show you are inefficient. I agree shouldn’t get the EEI offset because someone is just not efficient. So the 100kWh that have to be pay shouldn’t be the “cheapest tier” as per old tariff.

But the range of the EEI should change or there should be ultra off peak tier for people charging EV at home regardless of total consumption. If we have more EV at home for sure the house energy consumption will increase. Someone with 2 EV at home vs someone 2 petrol/diesel car at home doesn’t mean the 2 EV is more inefficient.

NEM there’s already a win at least if you offset fully, the charges is minimal. I let all the haters go and complain.
Nope. There will never be a negative bill. Bill will maintain the same but there will be NEM credit to further offset the bill per kWh. I think this it will be moving forward. So they will deduct as per kWh by peak hour first followed by non peak ToU. You can’t “sell” electricity more expensive and “buy” at a cheaper rate to earn some money.

This is based on the TNB calculator I tested. Didn’t see actual new bill yet.
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user posted image

never seen before negative bill? These one were due to icpt rebate previously
yeapsc73
post Jul 14 2025, 04:12 PM

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QUOTE(bee88 @ Jul 14 2025, 02:44 PM)
Don’t worry. With the current users who have already switched to tou and got their bill, I think negative is coming back. At a bigger number as well. But these may not be fully utilize and will expire I believe. Unless can try to offset the positive bill at the end of the year.
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i did a quick check based on the TNB calculator

for normal users with 1200kWh usage, TOU 10% peak vs 70% will result different in bill about RM30

while for NEM users, import 1200kWh, export 800kWh, TOU 10% peak vs 70% will result different in bill only about RM3, but both are about cheaper than using flat rate for about RM10


yeapsc73
post Jul 16 2025, 12:21 PM

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bad news confirmed EEI will be discounted for NEM users
yeapsc73
post Jul 16 2025, 01:37 PM

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Previously when I sized up the solar panel capacity, I try not to cut into the lowest 200kwh tariff bracket, but end up putting up a 7kwp system vs 5kwp system which only cost RM3k more. Now turn up that was a good decision.
yeapsc73
post Jul 19 2025, 09:47 AM

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For those comparing solar generation with others with similar capacity and wonder why your generation so low, you need to learn a bit about geography

The sun is shinnig more in the northern hemisphere since it is summer now

So naturally solar panel facing north will have more generation

You can see the reverse to be true from October to February
yeapsc73
post Jul 19 2025, 09:50 AM

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Anyway

user posted image


yeapsc73
post Jul 19 2025, 10:13 AM

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QUOTE(manx @ Jul 19 2025, 10:07 AM)
Use "Sun Locator" app to visibly simulate the sun throughout the year.
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Basically Malaysia is almost on the equator and sun is on top of the equator on equinox day around 23rd March and 23rd September every year
yeapsc73
post Jul 19 2025, 11:09 AM

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QUOTE(backspace66 @ Jul 19 2025, 11:00 AM)
according to pvwatts and a lot of other calculator online, the difference is negligible for either case (facing south or north) since my roof only has a tilt of 15 degrees, only 2% difference in a year

Facing south is better in our region but this is base on a conventional roof design. Negligible difference for almost flat roof
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In a year yes. But in certain months will be more on one side, but will average out in a year. You can check your daily generation to confirm.

yeapsc73
post Jul 21 2025, 11:43 AM

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QUOTE(Boy96 @ Jul 20 2025, 10:13 PM)
Ya typo should be 500

user posted image

The full image
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so damn expensive, and the saving is exaggerated
yeapsc73
post Jul 22 2025, 05:22 PM

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For old NEM bill, NEM export will offset the higher tariff brackets usage first and users enjoy low TNB bills as lowest brackets are much cheaper

However for new NEM bill, EEI is discounted, meaning NEM export will offset import on fix tariff. So the more the different between import and export, the more drastic of bill amount increase compared with old bills
yeapsc73
post Jul 22 2025, 05:23 PM

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QUOTE(stevenlee @ Jul 22 2025, 04:46 PM)
some say yes, some say no...
for now, i enjoying the saving and base on my calculation, after 5 years everything is free with condition device is working properly.

Saving only within NEM contract, after that hardly will hv saving since what ever you export out will not deduct from your usage..
Furthermore if device dmg after warranty, it cost few K to replace  sweat.gif
Some people request for longer warranty but that also subject if the company still exist in 10 years time  laugh.gif
Some people also plan for battery in future but this will add up more investment cost  sad.gif
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Can lah charge EV in the afternoon during weekend at least something
yeapsc73
post Jul 22 2025, 09:00 PM

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QUOTE(stevenlee @ Jul 22 2025, 08:50 PM)
Can you share your old bill to let me check and confirm.
When I looking at my old bill, at top it calculate my total usage in RM.
At middle it calculate my export in RM
Then at bottom of the bill summary, the total usage - ICPT + 8% and then minus Lebihan dijana in RM…

So, with such calculation, the bill is minus the RM after multiply with tariff , and not minus the kWh …
So the balance when you divide with kWh differences, you will get slightly higher than lower bracket tariff…

I found this when I try to develop an excel tracker then I noticed I can’t always get the amount by calculating the kWh diference x tarif.

That why I asking and my understanding is wrong so far  laugh.gif
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Similar. You can see that for export, TNB offset the 54.6sen tariff bracket first

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This post has been edited by yeapsc73: Jul 22 2025, 09:05 PM
yeapsc73
post Jul 22 2025, 09:10 PM

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QUOTE(stevenlee @ Jul 22 2025, 09:07 PM)
Ya, if same bracket, then no differences…what if the import is higher bracket and export is lower bracket..
I using import 800kwh and export 450, then I notice we pay extra higher if we not using kWh difference to calculate.. shakehead.gif
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If import 800 export 450, then will offset 200kwh at 54sen, 250kwh at 51sen
yeapsc73
post Jul 22 2025, 09:13 PM

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yeapsc73
post Jul 22 2025, 09:15 PM

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QUOTE(stevenlee @ Jul 22 2025, 09:12 PM)
Thanks for clarification…now understand..  nod.gif
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U understand too late haha now already tukar
yeapsc73
post Jul 22 2025, 09:17 PM

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QUOTE(Fazab @ Jul 22 2025, 05:24 PM)
Just drove past a billboard.
Developer advertising new houses as "solar ready homes with battery storage".

No need to pening kepala count every cent.
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Just marketing gimmicks. The battery size may only be minimal.
yeapsc73
post Jul 22 2025, 09:18 PM

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QUOTE(yeapsc73 @ Jul 22 2025, 09:13 PM)
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The bill will double to almost 70 based on new tariff
yeapsc73
post Jul 22 2025, 09:58 PM

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QUOTE(dwRK @ Jul 22 2025, 09:52 PM)
to me... just means got space to put battery near the jb... biggrin.gif
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Saying ready so should have some lah, if say ready for connection then most probably none
yeapsc73
post Jul 22 2025, 10:08 PM

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QUOTE(ameliorate @ Jul 22 2025, 10:05 PM)
Actually with the TOU scheme, you can charge your EV at night and weekend to save. Why need solar anymore?
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TOU no need to pay? At least solar is there already if can't export just use to charge EV loh. Free electricity.

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