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 Home solar 4 months in.

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dwRK
post Oct 23 2024, 10:48 AM

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QUOTE(mercury99 @ Oct 23 2024, 10:06 AM)
Would you know how is the connection from micro inverter or DB to the battery? I believe it's not so straightforward.
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replace micro with hybrid/battery... or add charger/inverter... ppl will sell packages by then

if adoption still bad/power not enough may still continue... roi liao not a problem can junk it... most likely daytime use till the max... biggrin.gif

This post has been edited by dwRK: Oct 23 2024, 10:49 AM
dwRK
post Oct 25 2024, 12:43 PM

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hi guys... yall getting hms 1800 or 2000 nowadays ?

dwRK
post Oct 26 2024, 06:33 PM

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QUOTE(sadlyfalways @ Oct 26 2024, 06:03 PM)
Anyone here using emit solar care to share their experience? Mine just got installed, waiting for tnb to activate
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isn't it too late to ask such question?

after install is time to share experience... good or bad...

edit: i changed my mind... i think is ok to ask and compare notes...


This post has been edited by dwRK: Oct 26 2024, 06:34 PM
dwRK
post Oct 26 2024, 06:42 PM

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QUOTE(mrstohchu @ Oct 26 2024, 03:28 PM)
Seems that most are on HMS as i can barely find any user contribution on HMT. Price wise, i got my system comparable to a HMS system so i went with it despite there being not much review on this series (To be fair, my vendor said he underquoted me).

So far only diff is i get a balanced distribution of the energy to each phase* n my per panel max is slightly higher. Asides from that, i cannot tell or have yet to discover.

*Good or bad i dont know, mr google n chat GPT says balanced better, others say ability to customise better šŸ¤·šŸ»ā€ā™€ļø.
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lets say you're using 3 hms... each connected to a separate phase in a 3-phase house... imho, that is balanced enough...

my home despite 3-phase, practically all my load is on a single phase bc downstairs aircon which was balanced to another phase is almost never used... lol

dwRK
post Oct 26 2024, 06:46 PM

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QUOTE(numbertwo @ Oct 25 2024, 05:24 PM)
I think HMT is a true 3 phase Micro Inverter ... more expensive than the HMS model hence not many solar vendor offer this, mostly offer only HMS. 
Spec wise there is some difference in terms of Max Input, but need electrician to decode what it means in terms of differences to HMS single phase model.

HMT-2000-4T
Max. input voltage: 65V
Rated output power: 2000VA
Number of modules connected: 4
Commonly used module power: 400W to 670W+
MPPT voltage range: 16V–60V
Max. input current: 4 Ɨ 16A
Number of MPPTs: 2

HMS-2000-4T
Max. input voltage: 65V
Rated output power: 2000VA
Number of modules connected: 4
Commonly used module power: 400W to 670W+
MPPT voltage range: 16V–60V
Max. input current: 14A
Number of MPPTs: 4
Max. input short circuit current (A): 4 Ɨ 20A
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the hms is also 4 x 16A... no difference with inputs...

dwRK
post Oct 26 2024, 07:46 PM

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QUOTE(mrstohchu @ Oct 26 2024, 07:32 PM)
I have 4 MIs so it would have been unbalanced if i went with the HMS..
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its not a problem having extra MI on a phase...

those single phase houses with 4-5 kwp all goes to 1 phase, MI is much less...

anyways just saying not an issue with home installations...

commercial is a different story amd have very rigid requirements

dwRK
post Oct 29 2024, 12:31 PM

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QUOTE(Icehart @ Oct 29 2024, 12:06 PM)
Current house under construction is 3 phase.
Asking because developer included this solar system as part of the house.
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quite sure you need to apply for higher capacity...

also most likely hard to upgrade panel alone... probably install additional panel/inverter


This post has been edited by dwRK: Oct 29 2024, 12:34 PM
dwRK
post Oct 29 2024, 04:56 PM

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QUOTE(netflix2019 @ Oct 29 2024, 03:26 PM)
my contractor subtle hinting i can add without Seda approval. but faham2 la, a few panels is okay.
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i prefer legally correct answers... do no harm to ppl... biggrin.gif

dwRK
post Oct 30 2024, 12:01 PM

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QUOTE(Cavino @ Oct 30 2024, 10:00 AM)
HMS are having 4 MPPTs while HMT having 2 MPPTs.

That means HMS series can have 1 MPPT to each panels while HMT are sharing 2 panels to 1 MPPT.
From my understanding, the more MPPT the better it is for efficiency of each independent panels.

Due my roof setup with many angles, separated with some facing front, some side, some bundle 4 panels, some 1 or 2 panels, the installer recommended 1 MPPT to each panel as each panels can have independent start-up, different shading efficiency, etc. So due to my panels splitting limited roofing positioning, HMS series are better than HMT albeit have to tie down each inverter to individual phase.

HMT with 2 MPPT will confined to 2 panels to same MPPT, with each dual panels having same startup, efficiency (the lowest of the 2), etc. If all facing same direction, they say ok but still I am unsure if 4 MPPT single phase in this case got any advantage over 2 MPPT 3 phase inverter.
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hms n hmt both got 2 mppts only...

in low lights multi panels to 1 mppt is better because of startup voltage... all these are balancing act between panels and mpps and inverters... unless one works out the details and specs, will be hard to say what is better...

dwRK
post Oct 30 2024, 12:47 PM

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QUOTE(adamw @ Oct 30 2024, 12:22 PM)
HMS1600-2000 is 4 in 1.

user posted image
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4 in 1 means 4 panels to 1 inverter... inside 2 mppts only according to specs...

dwRK
post Oct 30 2024, 01:22 PM

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QUOTE(numbertwo @ Oct 30 2024, 01:01 PM)
ahh.. some variation between Online page vs the Datasheet(downloaded).  As per Downloaded Datasheet, HMS-2000-4T has 4 MPPTs.  Online page says 2 only....

user posted image
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which is that?...

i checked many -4T mi... they all show 2 mppts only...
dwRK
post Oct 30 2024, 01:59 PM

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QUOTE(numbertwo @ Oct 30 2024, 01:48 PM)
the image above comes from Datasheet downloaded. 

Online page is this one, it says 2 MPPTs only :  https://www.hoymiles.com/product/hms-1600dw...00dw-2000dw-4t/
4 MPPTs makes sense if we look at the Data in Hoymiles dashboard, every panel has a different output

user posted image
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panel power/dc input can be measured independently before going into mppt... showing 4 doesn't mean you have 4 mppts


dwRK
post Oct 30 2024, 04:18 PM

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QUOTE(Cavino @ Oct 30 2024, 02:45 PM)
I also tot 2mppt based on website but my installer send this....they using 4mmpts.
I think this is the one in website Europe without D or DW behind just HMS-2000. The one in website for Asia comes with HMS-2000D or DW behind..

user posted image
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nice... des why have to know what is installed exactly... sometimes got customer spec not found on product pages...

dwRK
post Nov 2 2024, 12:06 PM

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QUOTE(RVN10 @ Nov 2 2024, 11:26 AM)
Hi Guys, need your opinion and suggestion between these quotes. Not well verse on the solar topic.

user posted image
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a b e... about same unit cost

a e... more power clipping but follow design norms so ok

a... 3 mi higher reliability... 1 fail 2 still ok...

did not consider c d... dunno what advantages

ppl here will mostly prefer a...

ps... typo, i just go down list a-e

This post has been edited by dwRK: Nov 2 2024, 03:01 PM
dwRK
post Nov 2 2024, 03:07 PM

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QUOTE(yeapsc73 @ Nov 2 2024, 02:54 PM)
Had almost identical set up as vendor A but with less efficient panel at 600wp. Been installed since last December and working well so far. Cost around 23k then with EPP

user posted image
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610 vs 600 no biggie lah...

at max sunlight... inverter already clipping it... at lower sunlight... not gonna get 10 watts difference... but yeah a few watts can add up...

dwRK
post Nov 3 2024, 07:17 PM

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QUOTE(yeapsc73 @ Nov 3 2024, 02:55 PM)
Sun at southern atmosphere after September so those panel facing north will have less generation after that
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he didn't mention inclination... if warehouse type flat, almost no effect at all...

dwRK
post Nov 3 2024, 07:18 PM

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QUOTE(pakjat @ Nov 3 2024, 06:03 PM)
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
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you using pathgreen with string inverter?

dwRK
post Nov 3 2024, 07:21 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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someone mentioned here service not so good a few pages back...

i supposed it depends a lot on expectations... so quite subjective especially no details given...

dwRK
post Nov 3 2024, 10:36 PM

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QUOTE(pakjat @ Nov 3 2024, 05:27 PM)
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?
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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...


dwRK
post Nov 4 2024, 01:00 AM

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QUOTE(pakjat @ Nov 3 2024, 11:31 PM)
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.
user posted image

this might be the culprit for the power drop? or it just purely due to the clouds?
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sure looks like it... can easily confirm... find a sunny 1pm see what happens... smile.gif

ive seen a few charts... always around 1pm... biggrin.gif

most ppl design pv kwp >= 1.2 x kwac to get more power in the am/pm/cloudy days... so this is quite normal...


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