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 Home solar 4 months in.

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pakjat
post May 7 2024, 10:32 PM

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i've compiled all the package shared here including the one i had (before 4k Solaris rebate) for reference

user posted image
*updated 03-06-24

i made comparison between few inverters too

user posted image



This post has been edited by pakjat: Jun 3 2024, 12:02 AM
pakjat
post May 9 2024, 04:53 PM

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QUOTE(Jason @ May 9 2024, 04:37 PM)
Yesterday the installer company technician came with drone... took footage and photos of my roof.. also discussed where to put my inverter and explained how they will run the cabling.. now waiting for them to send me proposal of how it'll be installed.
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pls share their cable plan later biggrin.gif will they make few splits along the way or single long cable all the way to inverter?
and most of the time installer will only show cropped inverter photos in their promo and not showing the room space. so cant really imagine the overall look

pakjat
post May 9 2024, 06:38 PM

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QUOTE(Jason @ May 9 2024, 06:00 PM)
Sure. Terrace house, so it's on the side wall back to back with neighbor. Away from my main entrance. Shaded but of course if heavy rain some water will splash, but more importantly no direct exposure to sunlight.
Front of house, hmm, actually can also place behind my house. Is the sound audible if you close all windows/doors?
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the inverter will be outside the house? how far is the inverter from main DB? anyway all the DC cable will be in cable trunking/casing right?
pakjat
post May 9 2024, 11:53 PM

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QUOTE(Jason @ May 9 2024, 09:17 PM)
My DB is also in storeroom, same louvre door as you. I decided not to put inverter there because 1. Heat & 2. A bit small there in the future to fit batteries if needed.
I reckon about 12M. In any case it’ll mean that the DC cables will be shorter and more direct running adjacent to my rain water drain pipe. And the AC wiring to DB longer. Anyhow voltage drop for DC is higher but just size the cable properly should be fine.

Anyhow I’ll wait for their proposal and see what they say. My DB is dead center of the house below the staircase.
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did you consider microinverter? its AC DB will be in smaller size and will not get heated up right? any reason?
where do you plan to store the batteries in future?
pakjat
post May 10 2024, 12:46 AM

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This post has been edited by pakjat: May 15 2024, 03:15 PM
pakjat
post May 10 2024, 10:13 AM

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QUOTE(netflix2019 @ May 9 2024, 06:25 PM)
Definitely not if separated.

I placed mine in the storeroom underneath stairs. The door is the type like roman curtain. So its audible if i am within 2 meters. I extra sensitive to that kind of noise.
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how is the heat generated by the inverter? noticeable when u enter the store?
pakjat
post May 10 2024, 06:43 PM

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This post has been edited by pakjat: May 11 2024, 09:54 AM
pakjat
post Jun 16 2024, 05:05 PM

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QUOTE(dwRK @ Jun 16 2024, 10:46 AM)
cool tests...

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thanks for sharing thumbsup.gif
now I've started watching her experiments in other videos

so does this means the "shading issue" on string is not as bad as we actually thought?

This post has been edited by pakjat: Jun 16 2024, 05:07 PM
pakjat
post Aug 17 2024, 02:59 PM

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today i received email from SEDA that my application has been approved. with the application number provided in the email i log in into SEDA web as applicant.

i saw from the details, the total kwp applied is similar to what the contractor proposed to me. but for the inverter, they apply for 8kwac output instead of 6kwac as what they proposed in final quotation. any reason for this?

btw the DC/AC ratio for their proposed system is at 1.4
pakjat
post Sep 6 2024, 07:16 PM

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QUOTE(Jason @ Sep 5 2024, 09:52 PM)
I check morning, noon, evening. MPPT1 is always higher than MPPT2 in terms of voltage, amps will be close.
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mind to share the value read?
pakjat
post Oct 7 2024, 05:59 PM

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QUOTE(zartegh @ Oct 7 2024, 01:45 PM)
Oh, and also good to mention that the solar installer provided a 5-year interest free installment plan with credit card, which I gladly took. Helps with the cashflow.
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is it standard chartered card? or others?
pakjat
post Oct 20 2024, 09:36 AM

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hi gents. tomorrow is the installation day for my house. any last minute advice of what to be check closely for the whole process? kinda worried if got water leak later on even it's under warranty.
pakjat
post Nov 3 2024, 04:03 PM

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u guys who are using string inverter, what's the highest inverter internal temperature u guys have seen & where's ur inverter located?

mine located in DB store room. highest i've seen is 62.5°C. then i add small cooling fan highest so far is 53°C. but doesn't look like affecting the generation at all. not sure how much the inverter lifetime will extend with the lower temperature.
pakjat
post Nov 3 2024, 05:27 PM

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QUOTE(skywardsword @ Nov 3 2024, 04:29 PM)
Yes 60-80d Celsius is common within working temp. My manual indicates the hottest it can withstand up to 150degrees celsius.
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at 150°C inverter will shut itself down and auto start once temp cool down?

QUOTE(skywardsword @ Nov 3 2024, 04:29 PM)
Main thing is have airflow. No big issue. The unit I am talking about is a 12kW inverter. So it is as big as it gets.
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ur 12kW unit comes with built in fan? or with natural convection heatsink like mine?

QUOTE(skywardsword @ Nov 3 2024, 04:29 PM)
I have noticed sometimes at 12-1pm also it can drop from  13kW to 1-2kW. I do not think is because of overheat.
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i too noticed many other string user with same power drop pattern during same period. might be the pv panels are the one overheated and reduce the power output?
pakjat
post Nov 3 2024, 06:03 PM

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QUOTE(RVN10 @ Nov 3 2024, 05:35 PM)
Need input on Pathgreen  interm of / in comparison to Verdant, Gsparx and alpha solar.. in terms support and reliability.

Based on the qoute i received, Spec to price wise Pathgreen is the best so far. Need feedback on their service before I pull the trigger
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I'd say they did a neat & tidy installation. running the cables above plaster ceiling with minimum cable duct in sight

timeline wise is quite ok as i regularly follow up not only with the sales & project supervisor, but with SEDA & tnb too

SEDA application till cert issued - 12 days
TNB NEM application till welcome letter issued - 3 days
SolaRIS rebate form received 4 days later. now waiting for the rebate within 14 working days

pakjat
post Nov 3 2024, 10:23 PM

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QUOTE(dwRK @ Nov 3 2024, 07:18 PM)
you using pathgreen with string inverter?
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yes. SUN2000 8KTL M1 & Trina TSM-NEG19RC.20 605W x 14pcs.

On the installation day, i re-discussed with the site supervisor about the strings looping since they initially planned to loop 1 MPPT to 2 roof orientation to equalize the panel numbers which i foresee will cause reduced power output. the supervisor reply honestly that he didn't really sure since he experienced only for microinverter installation. we proceed to confirm with the project engineer, and he order the installation team to redo the looping to only 1 MPPT for each roof orientation regardless the number of panels.

1 piece of roof tile also cracked during panel installation and they immediately come and replace with a new tile on the second day for system commissioning. they also make a second layer of skimming on the plaster ceiling where they cut open for cable laying on the 1st day.

it has been running for 7 days with highest yield 40kWh, lowest 20.6kWh, and average 31kWh. to be fair, not a single day with a solid sunny day yet at my place.

to me as long as the company's representative is responsive and open for any discussion, that's quite good already.
pakjat
post Nov 3 2024, 11:31 PM

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QUOTE(dwRK @ Nov 3 2024, 10:36 PM)
imho... peak sunlight could result in high voltage... this can trigger inverter protection circuit... overheat pv also usually reduce output... these can be monitored/observed...
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my inverter has max DC voltage input at 1,100V. from the historical graph below can confirm total voltage never reach that much
user posted image

but if looking at DC current input, looks like it does exceed the inverter max DC current input limit at 11A by ±2A.
edit: i've double check with the name plate on the inverter, DC max current input is 13.5A. seems like the spec sheet i refer for above is obsolete.
user posted image

this might be the culprit for the power drop? or it just purely due to the clouds?

This post has been edited by pakjat: Nov 4 2024, 11:10 AM
pakjat
post Nov 3 2024, 11:35 PM

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QUOTE(bee88 @ Nov 3 2024, 10:51 PM)
It can be overvoltage problem too. So depends on the error code if got.
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i never get any alarm/error code when the power drop occurs.

btw hi bro, I've finally get a string inverter with PG. thanks for all your sharing here notworthy.gif
pakjat
post Nov 4 2024, 10:36 AM

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QUOTE(BaRT @ Nov 4 2024, 10:16 AM)
I wasn't aware that PG offers string inverter too.
Compare with PG microinverter, what is the price difference?
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with same microinverter total output package, i get around 12% lower price

i choose string because my roof only have 2 orientation

This post has been edited by pakjat: Nov 4 2024, 11:35 AM
pakjat
post Nov 4 2024, 11:42 AM

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QUOTE(Drian @ Nov 4 2024, 10:47 AM)
clouds, it is quite normal to have drops.
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yes i believe that is the case as i just realized that the DC current value is still within my inverter operating range.

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