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 Home solar 4 months in.

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numbertwo
post Jan 7 2025, 12:09 PM

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QUOTE(vhwy1 @ Jan 7 2025, 11:43 AM)
My 1 only 1 day hit 43kWh, think the different is my roof top are not flat @.@ average 38kWh.
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even on same capacity, solar generation can be affected by area you live, direction & angle of your roof..
numbertwo
post Jan 9 2025, 09:01 AM

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QUOTE(sgpdsmss @ Jan 8 2025, 06:24 PM)


*cut*

BTW..

did u switch on solar power breaker to use the solar power ? or just off n wait for tnb?
actually ...my also installed 3RdJan ..
solar admin told my meter need to change ..wait for tnb ppl call for booking time date for change meter ..

until today ..still no call ...
thanks ....
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I have had this bad experience, long delays from TNB too. Two things you may do :

1. Go to MyTNB website, under Application , send a Ticket to ask why the delays.

2. Make sure you don't missed call or ignore calls from strangers. I was ignoring strangers' calls (using Truecaller), ended up TNB replied my ticket saying no one picks up the phone. Their contractor is using strange name, hence as a normal reaction - ignore! haha


Hope this helps.
numbertwo
post Jan 9 2025, 01:55 PM

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QUOTE(sgpdsmss @ Jan 9 2025, 09:30 AM)
1) which number u use to enquiry ?

2) ok ...

thanks
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sorry what do you mean by 'which number' ?

In mytnb website, under 'Apply' menu -> 'I want to check my application status', check if there is existing Service Request 'Change Tariff" or 'Meter Change" .. If none, proceed to raise a Ticket. A Ticket is better than calling them because you can always refer to the Ticket to check status of your request.
numbertwo
post Jan 9 2025, 01:57 PM

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QUOTE(adamw @ Jan 9 2025, 11:52 AM)
If worry too much no need install. TNB enjoy collecting $$$. Cloud app down for all inverters does not means no generation, you can always opt for a 2 way smart meter to view the statistic.
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any recommendation on the 2-way smart meter , ie. Brand, cost, installation, etc. I presume it can show Total Gen, Self Consumption, and Net Export ?

Thanks
numbertwo
post Jan 10 2025, 10:58 AM

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QUOTE(sgpdsmss @ Jan 10 2025, 10:27 AM)
update ...

6jan tnb status ..pending replace meter

10jan ....meter changed ...

so solar system can go operation ..

now waiting solaris rebate email ...

thanks ....
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good that you finally find the Status in Tnb Application monitoring system.

Anyway, meter changed doesn't mean you can turn it on, next is to wait for TNB Welcome letter which by then you would have another application called 'Change Tariff' ...

This post has been edited by numbertwo: Jan 10 2025, 11:00 AM
numbertwo
post Jan 10 2025, 03:07 PM

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QUOTE(sgpdsmss @ Jan 10 2025, 12:37 PM)
got 1 service application call
change tariff  - replacing meter 
then meter already replaced ...

after 2hours later received NEM welcome  email say above service application completed ..

so still have another application to wait?

i also received tnb bill early cut off today date 10jan ....counted 14days period ...this meaning ??
thanks ...
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I think that's the current/latest bill before the NEM Bill type starts ..
numbertwo
post Jan 10 2025, 04:55 PM

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QUOTE(sgpdsmss @ Jan 10 2025, 03:15 PM)
so only can know when the solar system down ?
maybe ..

anyone have similar bill as me after solar in operation ?
thanks
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i think all of us went through the similar process, must settle the existing NON-NEM bill first, before the new NEM Billing starts.
numbertwo
post Jan 10 2025, 05:02 PM

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So, Micro Inverter or not ? This is one of the situation when Micro fares better I believe.

1 Solar panel is down and my vendor still hasn't come to fix it after I reported it 4 days ago.

For this kind of a situation, you should be happy that you have MI instead of string ? If it is on String, it would have lost all generation I presume ?

user posted image
numbertwo
post Jan 13 2025, 05:59 PM

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QUOTE(dwRK @ Jan 10 2025, 08:56 PM)
panel has at least 3 bypass diodes... if shading or faulty, the affected section is bypassed...

on a string system... you have normal production from other panels and probably partial production from the shaded or faulty panel...

on micro inverter... the shaded or faulty panel most likely will have zero production because it has insufficient startup voltage...

so a string system is better here...
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on Micro , the rest of the panels will still generate as usual. Tks for the info on string's bypass diodes.. Was trying to convince my friend why Micro would have an advantage here ..
numbertwo
post Jan 14 2025, 03:41 PM

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QUOTE(Cavino @ Jan 14 2025, 11:03 AM)
Like that what is point of micro inverters in such cases.....

One of their strength vs string inverter last quoted is 1 panel failing won't affect others while string inverter's panel failure might affect others.
If string inverter can do the same (1 panel failing in the same wired group, not affecting others), then that so call micro-inverter advantage is muted.
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some said one can opt to install "optimizer" for String setup in order for it to work like a micro's.. but i'm not sure if this comes standard or customer has to opt to add-on this device.
numbertwo
post Jan 14 2025, 03:54 PM

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QUOTE(sgpdsmss @ Jan 14 2025, 02:07 PM)
no wor....ha..ha
NEM Cert declared max 5kwac
meaning max can export to tnb only 5kwac?

my panels production extra 1.xxkwp may carry forward to next month ?
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interesting , would like to know if TNB accepts the extras generated.

Mine is on 3P, and my cert shows:
Declared Installed Capacity (kWac) : 6.000
Installed Capacity (kWp) : 7.260

Also on Micro..

You can scroll back old pages to see why we never able to achieve 7.xxkWp as per your installed value.. Sifus said it is due to 'clipping' which includes many factors that prevent the output from getting the max kWp.


numbertwo
post Jan 14 2025, 03:55 PM

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QUOTE(Genosyde @ Jan 14 2025, 03:52 PM)
It's optional at additional cost but from what I have gathered, not worth it. Might as well just go for micro.
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Tks for the info.
numbertwo
post Jan 14 2025, 04:53 PM

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QUOTE(sgpdsmss @ Jan 14 2025, 04:33 PM)
pg so bad,never  tell the true..
are u on single phase or 3 phase ?
your Cert declared 6kwac

mine single phase declared 5kwac
single
yes they allowed ..
pg limit or seda limit?
my seda Cert declared 5kwac only

i asked pg, told max for single phase declared 5kwac
...
so possible to change to 3phase and up the declared kwac?

thanks ...
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3P = 3 Phase. So mine is 3 Phase.

If TNB has not rejected your total export, there is not worth to upgrade to 3 Phase. You may monitor your max generation to see what is the max your system can produce. Mine, peaked at 6.43kWh, that's the max it can produce from a 7.26kWp system, roughly 88% efficiency. You can monitor yours.
numbertwo
post Jan 14 2025, 04:55 PM

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btw.. if anyone would like to form a PG user_group thru WA or Teleg, I'm happy to join.
numbertwo
post Jan 15 2025, 10:24 AM

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QUOTE(cdspins @ Jan 15 2025, 10:08 AM)
Alot of question... let's tackle one by one.
The solar panels max can produce 7.38kw if you have a matching inverter. But as your inverter is limit at 6kw, so your solar system can only produce max 6kw. Panel is just the panel on your rooftop, inverter is the one that change DC to AC. Solar power system is both the panel and inverter working in tendon.

TnB will just take in what can be output by your solar power system. So in this case the max inverter output is 6kw. the 5kw is just a soft guideline for application.

Extra 1kw form solar panels is can never be generated, because your inverter max output is 6kw. So you cannot use things that is not available.
This is right!
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Jus trying to understand more, so based on the data generated how did the system manage to generate > 6kWp ? Mine also 3 units of HMS-2000 which technically only produce 2000W each. Data below was captured via Hoymiles app.



Maximum W from CSV
2024-10 6120 6.12 kW
2024-11 6068 6.068 kW

This post has been edited by numbertwo: Jan 15 2025, 10:26 AM
numbertwo
post Jan 15 2025, 10:27 AM

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QUOTE(bee88 @ Jan 15 2025, 10:14 AM)
Yes. Like I said, it’s all depending on the type of shading, which panel got shaded and how much the shading. But it will result in a lower yield generally when shading occur. Bypass diodes can help a little on panel level, but to ensure string system is optimized, it’s best to use optimizer so that the lower panel will not affect the output of other panels. But need to consider the cost vs the efficiency it boost too.

for example, if micro yield 10% more yield compared to the string counterpart, but the price is 20% or 30% more, then perhaps it’s the costing probelm.  But if the price is the same, then it will be different situation. So it all depends on what offer u get.
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After reading all these, it does sound that both system are equal in a small setup , insignificant to pay more for Micro. So , why Micro? only thing left significant is the ability to monitor individual panel ? hmmm..

This post has been edited by numbertwo: Jan 15 2025, 10:28 AM
numbertwo
post Jan 15 2025, 10:29 AM

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QUOTE(mac_mac21 @ Jan 14 2025, 06:24 PM)
PG sales team can join?? laugh.gif
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can la.. if you are able to help escalate after-sales issues. cool2.gif
numbertwo
post Jan 15 2025, 11:08 AM

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QUOTE(bee88 @ Jan 15 2025, 10:47 AM)
Max it can process per Port is 538.6w. So if ur panel is rated at 600w, clipping is around 60w during peak hours.
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yes i have came across 538.6w x 12 panels in a rare timing. But based on what cdspins explained, the inverter is max out at 2Kw each so the rest of the generated watts will never get out from the inverter.
numbertwo
post Jan 16 2025, 11:16 AM

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QUOTE(Genosyde @ Jan 16 2025, 11:11 AM)
That 10kWac inverter is going to cost much more than the 8kWac one but the extra power generated will not be enough to offset the extra cost.

So why is the inverter always undersized? It's for the off peak hours. Say in the morning or evening when your panels are not generating the maximum 8.6kwp. Having 14 instead of 13 panels is going to help generate a bit more power during these off peak hours and the cost of an extra one or two panels is not that expensive relatively.
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so in layman terms.. having a smaller inverter will make sure it is working in optimum load when sun isn't directly on top of the head in most of the day time 12 hours. When the sun peaks at noon for that 1-2 hours clipping happens becoz of the smaller inverter, but it is just for that 1-2 hours.

Is this correct?
numbertwo
post Jan 17 2025, 01:05 PM

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QUOTE(virtualgay @ Jan 17 2025, 11:52 AM)
mine was average RM450 and i install till 600
friend average 300 install till RM800
so i can confirm SEDA dont care
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300 to 800... truly if the house isn't housing more headcounts more airconds more EVs, TNB truly says thank you so much by end of the year.

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