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 Home solar 4 months in.

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cdspins
post Sep 10 2024, 12:27 AM

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QUOTE(emjay @ Sep 8 2024, 10:48 PM)
Will check on pricing for the 2 additional panel and whether roof space is available.
TQ for feedback.
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Just my guessing, not 20 panels probably to balance the system for 3 phase, where each phase have 6 panels...
cdspins
post Sep 23 2024, 10:24 AM

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QUOTE(SupermanLick @ Sep 22 2024, 05:14 AM)
Olang gila pakai, 10years payback
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It all depends on your usage. If one electricity bill rarely goes over RM150 per month, the solar system without the rebate indeed need about 10 years for ROI. You are not wrong at all. But if your usage is higher, the ROI then shorten significantly due to the ICPT.... It all boils down to one's usage.

This post has been edited by cdspins: Sep 23 2024, 10:25 AM
cdspins
post Sep 24 2024, 05:23 PM

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QUOTE(twhong_91 @ Sep 24 2024, 04:57 PM)
My solar system done install then the installer said need to wait for tnb contractor to enable export 051 function? Dunk wat it mean, can i curi2 turn it on?
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Why you don't ask the installer then and there?

The simple answer is that you may risk being charge for exporting as your meter is not bidirectional/yet to switch to bi-directional... exporting will be recorded as importing and you will be charge for all your export.

cdspins
post Sep 25 2024, 04:20 PM

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QUOTE(BaRT @ Sep 25 2024, 12:38 AM)
U mean feeding into grid outside of his house?
How it possible if the export function is not yet activate?
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electricity is just like water flow... once it is connected, it will flow. Energy generated by solar panel (higher energy force) will flow to appliance or to the grid that have lower energy force. like water flowing down stream.

As for export function. It is just a term in the TNB meter for bi-direction... Normal meter usually count electricity flow passing through (as it is assume energy only flow into hoursehold, it direction is never register but only the volume) but with solar, the direction of the electricity flow become important.
cdspins
post Sep 29 2024, 09:02 AM

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QUOTE(heliozguard @ Sep 29 2024, 07:39 AM)
Guys if I'm selling my house. Can I take the solar with me. How does NEM work then. Tied to house or user haha.
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I believe it is tie to the house TnB meter... so practically tie to the the house...
cdspins
post Sep 29 2024, 11:55 AM

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QUOTE(bee88 @ Sep 29 2024, 09:13 AM)
Not really. The meter can be changed anytime. It’s just that when the first time activation, they will take the meter serial number and the reading.

So if you move to a new house, the meter will be taken back. Usually Tnb remove the meter once customer terminate the acc.

For transfer, you  have to have a meter with your new house , and then apply to SEDA. Don’t terminate your Tnb first.  If you terminate, then consider your contract revoked.

Some FIT owner also did that in the past. But all need seda approval. And thst means application is through the provider.
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Oh... thanks for the info, last time my contractor told me that if sell house, sell with the system.
Probably he didn't tell me about need SEDA approval this and that. but come to think about it, maybe will be too much hassle to get a contractor to move the whole system and the additional cost.... If already recoup ROI after 5 years.... then probably just sell with a few K profit... I guess hmm.gif
cdspins
post Sep 30 2024, 02:50 PM

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QUOTE(Cavino @ Sep 30 2024, 01:20 PM)
Actually I corner lot supposedly got bigger roof compared to the middle terrace but the roof design with so many corner and triangle shape thus instead of putting straight rows of panels, i have to split it up...2 over here inside this triangle spaced roof, 1 over there, 3 more over here...

So instead of roof with space with at least 20 panels, my old style roof design can only fit 11 already max out. Forced to use my car porch roof to add more that is originally not in the plan.

Yes, the space is very limited thus bigger size panels will reduced the number of panels I can put in aka in 1 part of roof, we try to squeeze in 4 panels but if size if bigger, maybe only 2-3 panels.

That is why I asking if consumer (not commercial), heard got 700-750KW panels, if almost similar size then can use same number of panels to generate higher capacity. I targeted 22-23 panels for 13k++ Kwh..but now maxed out at 10+ Kwh and that is pushing limits on all available roof space. In practical installation later,  not 100% sure if need to remove another panel or 2 if real installation cannot fit.

As I hear from relatives mentioned now got 700-750Kw per panels, why still using 590 Jinko and 610 Ja solar that is already outdated now...I blur liao coz I tot currently (as of now only) in Malaysia, most tier 1 are at 590 to 610 or I am wrong at that?

So I ask here got anyone hear anything about 700kw panels (at least on tier 1 graded panels)?
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Hmm... what is your inverter capacity? if you already at 1.2 performance to your inverter, there is little benefit to go for 700-750 panel, unless by doing so means you want to install less panel. But generally when you sign, it already indicate number of panels... as the surveyor should have calculate the roof size and fittings, routings into the costs.

cdspins
post Oct 17 2024, 12:31 PM

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QUOTE(Relaxing work 2 @ Oct 13 2024, 09:14 PM)
Thank you for sharing. Now I am thinking of making a small panel to cover up the inverter to reduce the high frequency pitch.
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Just let it be first. For my case there is totally no noise at all... probably ambient noise from outside is louder
Just let the system run and then you check if you can noticed any noise and if you are able to tolerate about it.

The inverter have fins for heat dissipation, but if you cover it up, it may not be efficient...

cdspins
post Oct 18 2024, 03:54 PM

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QUOTE(lancer193 @ Oct 18 2024, 11:38 AM)
Question, I had solar consultant came to my house for site visit last week. He took a drone fly over and take some photos.

Conclusion is my roof angle tilt at 43 degrees so it is not recommended to install panel on it, due to high chance of leaking.

Is it true what he said? i thought panel has to be install at certain angle to get maximum yield but 43 degree is too steep?
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Basically it either need extra cost that he think you are not willing to pay or his site have no expert to install it.
I am guessing the later.

Why not ask quotation from a few company.
Based on common sense, high tilt roof less chance for leaking, as water are drop off nearly immediately from roof
Solar efficiency and installation maybe slightly difficult though but leaking reasoning is abit hard for me to understand.
cdspins
post Oct 19 2024, 04:57 PM

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QUOTE(lancer193 @ Oct 18 2024, 05:55 PM)
I have approached a few companies but only one is willing to come for site visit since its quite outskirt (near Sepang).

He told me two reasons, high chance of leaking & high chance of the bracket hanging the panel to spoil and the panel falling off the roof.

I will try approach other solar provider again, probably due to high enquiries they are quite busy  biggrin.gif  biggrin.gif
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Ya, solar installer now have tonnes of back logs. So basically slow response.
Yours is roof tiles or metal roof.
Usually solar bracket is install into the roof truss and then protrude out to support the panels for roof tiles..
For metal roof, is may slightly different
cdspins
post Nov 15 2024, 02:26 PM

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QUOTE(sadlyfalways @ Nov 15 2024, 02:21 PM)
just realised something lmao

since installation my phev has not been able to charge with my ev charger. when i use the portable one near the solar inverter, that means the switch is near, it also doesnt work. if i use another switch or plug in my house it works. the solar wiring runs ontop of the ev charging wires. could this be a harmonic issue or is it a grounding issur? even when i turn it off it doesnt charge
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That is very strange. You mean power socket right?
So can the power socket operate normally for other appliance? Only PHEV charging not possible?
cdspins
post Nov 15 2024, 02:45 PM

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QUOTE(sadlyfalways @ Nov 15 2024, 02:37 PM)
the main ev charger is a bmw one. this cant charge the car. it lights up and everything, connects to the car, lights turn blue, but the knocking noise that validates safety doesnt come.

the portable charger when connected to the power socket that is outside (right below bmw ev charger) and a meter away from the inverter also doesnt work for ev charing

but the power socket near the kitchen however works with no issue. it is also a meter away but in the opposite direction, with no solar panel cables running near it
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Is it a 3 phase power? I assume main ev charger and the power socket outside maybe the same phase, or the ev charger is a 3 phase?
On the other hand the kitchen socket maybe on different phase.... Solar cable panes running over other cables should not have any issue... it probably due to grounding or connection from the circuit breaker to the inverter or to your ev charger ...
cdspins
post Jan 15 2025, 12:20 AM

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QUOTE(mac_mac21 @ Jan 14 2025, 01:36 PM)
so Hms 2000 micro inverter only can convert 2kw max DC to AC?

Means need to add 1 more unit to maximize 7.38kw?
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Oversizing the solar panel to the inverter up to a ratio of 1.33 is common practice to get the best efficiency and value.
It is not economical to undersize, that's why no installer do it.

the theory behind is that you only get full generation during noon for maybe 1 to 2 hours... for the rest of the time, your solar panel is operating at less than 80% of the rated inverter capacity. So economical wise, inverter is more expensive so it is best to maximize the inverter time running in full capacity rather than maximizing the solar panel output.

cdspins
post Jan 15 2025, 12:30 AM

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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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although your panel capacity is rated more than your inverter. You will never able to generate more than your inverter (max output power). This is what it means by clipping. What happen is that your inverter will handicapped the voltage of your panel so that it does not generate at 100%.
cdspins
post Jan 15 2025, 12:36 AM

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QUOTE(Scissorshand @ Jan 14 2025, 04:00 PM)
No point max tnb will accept is 5kvac if not mistaken

Doubt so unless u charge ev during daytime to prevent “clipping” if I’m not mistaken
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TnB will accept all the power that you generated from the inverter within a limited threshold... the 5kvac is not a hard threshold that will cut off your bi-directional meter. so no worries if you happen to generated slightly more.

As for the clipping, it is slightly different scenario. Even if you maximize your electricity usage to "use" as much as possible or even use more than your generation, it will still clip as clipping happen at the inverter, not at the meter.
cdspins
post Jan 15 2025, 10:08 AM

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QUOTE(sgpdsmss @ Jan 15 2025, 08:17 AM)
meaning to say..

inverter 2kw x 3 = 6kwac
panel 615w x 12 = 7.38kwp

the panels max can produce 6kw  n below?

so only 5kw can grid to tnb?

extra 1kw need to use it on day time ?

thanks ....
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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.

QUOTE(dwRK @ Jan 15 2025, 08:55 AM)
simply put... panel can produce 7.38kwp... but inverter will only produce 6kwac to sell to tnb... 1.38kwp is "lost" during peak sunlight hours of around 12-2pm...

before 12pm and after 2pm, and cloudy conditions... panel will produce less than 6kw... nothing is "lost" during this time...

pg is supposed to only sell you 6.5kwp/5kwac system... they sold you a bigger package than allowed for 1 phase and lied to seda/tnb...
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This is right!

cdspins
post Jan 15 2025, 10:29 AM

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QUOTE(sgpdsmss @ Jan 15 2025, 09:43 AM)
i received my welcome letter on 10Jan,
till today not yet receive solaris rebate email ....
check back few days data , max  can produce  5.92kw ..but only short times ..then drop to lower ...

the seda Cert indicated declared instal capacity 5kwac and installed capacity 7.38kwp

i think pg not lied to seda...they lied to customer ...
customer only know install this package can save how much ..they dont know got limit sell to tnb and panels cannot constantly production max output ...
like me .....

for  panel 615w x 12 = 7.38kwp,
max can produce how many output if whole day hot day ?
after 5days used ..max 1 day 36.05kw
the rest more lower production ...

thanks...
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Hmm... not sure abut your solar sales consultant. but generally it is advise to get quotation from few vendors before deciding.
Throughout my experience, they will mentioned that typical minimum sun hour is around 3, so 7.38kwp x 3 sun hour is 22.14kw a day. So for your system, generating 36.05kw is consider very good and of course, most of the day, it will be nearer to 3 sun hour benchmark. So from your system, you should be able to offset 30 day x22.14 = 664 kwh from your TnB bill on average. Equivalent to RM270. Or if use higher 3.5 sun hour average... saving is about RM340
So.. just wonder how much saving does the consultant promise you? Is it within the range I mentioned?
cdspins
post Jan 15 2025, 10:34 AM

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QUOTE(numbertwo @ Jan 15 2025, 10:27 AM)
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..
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I think the most significant consideration is roof design... if you have a flat roof, then just go for string. But if your roof is the pyramid type, then micro is better. String have usually 2 MPPT where each MPPT can regulate voltage to maximize generation. Micro on the other hand also usually have 2 MPPT each, but as you have a few Micro.. you get get alot of MPPT.

So my thought is that consider micro, if your surrounding has other tall building, trees that can cause shading or your roof design is edgy and panel are install in different orientation from one to another.
cdspins
post Jan 16 2025, 12:52 AM

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QUOTE(tritritri @ Jan 15 2025, 03:40 PM)
hi all, I now have 2 options for Solar.

Option 1: 8.6kwp solar panel + 8ktl SAJ inverter ~RM20k
Option 2: 8.6kwp solar panel + 10ktl Solis inverter ~RM25k
Option 3: 8.6kwp solar panel + 8ktl Solis inverter ~RM24k

Which option would be good to go with? A little confused here cause not many are using SAJ inverter, though the price point is attractive
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No sure why option 2 is there. Usually common practice will not have an inverter larger than panel. Probably there have too many units of it.
If it is for me, I will just choose the cheapest which is option 1. Cause no matter what brand of inverter, the warranty is the same, the efficiency is also about the same. so the cheapest will allow the fastest ROI.
cdspins
post Jan 16 2025, 01:00 AM

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QUOTE(ccschua @ Jan 15 2025, 04:09 PM)
PG said before the export feature is enable by TNB, and if u turn on the solar system, whatever excess generation (can not be exported) becomes load, and jack up the bill. is this true ?
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It is not 100% true but it is partially correct. It actually depends on your meter and its behaviour.
1. bidirectional meter will register both in and out of power from your meter (this is the operating TnB meter for our solar home)
2. normal meter that register all power unit, is the one that will jack up your bills when electricity flows out
3. single direction meter that only register power feed into house, but not to the grid. So basically your energy goes to TnB for free.

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