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

ya ..ya..most customer want to save money ,dont care the spec , installation

delivery saving but not optimum value ..

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.

Maybe I can add in more info:

Option 1: 8.6kwp solar panel  (Longi 610W) + 8ktl SAJ inverter ~RM20k
Option 2: 8.6kwp solar panel (Trina 615W) + 10ktl Solis inverter ~RM25k
Option 3: 8.6kwp solar panel (Trina 615W) + 8ktl Solis inverter ~RM24k

Option 2 was optional to have a bigger inverter, but from all comments seem it doesn't make sense.

So boils down to Option 1 & Option 3 now. I think panel wise both are very similar so nothing much to compare of..? My decision choice now ultimately depends on the inverter brand.

I saw that on the market most companies offer Solis, Huawei, Growatt inverter, but not so much for SAJ inverter. Wondering if there's any catch with SAJ inverter..?

1KW worth of panel cost how much?

Huawei 8kW inverter is rm6.6k

Huawei 12kW inverter is rm7.7k.

Source : https://eezee.com.my/brands/huawei?menuOpti...iesTotalCount=6

Seems cheaper to overspec inverter.

Overly optimistic. Most of the time you got nothing to clip

Regardless of the roof profile, malaysia weather is cloudy most of the time and very rarely u will have 100% sunny in the day to have a perfect bell shape

FYI, mine is 6kwac microinverter 7.2kwp panel, even if 5kwac microinverter used, the reduction in generation maybe only 5% the most

Based on the contract with SEDA, we are not allowed to add additional panel to our solar panel system.

Not allow to add without SEDA approval, but if reapply for upgrade is a different story.

But if you ask contractor to do for you, it won't be cheap. And if you are just adding additional panel, not much contractor will want to do it. cause less profit....  so they will either charged high labour cost or turn you down. In short it is not so worth it. (this is case of buying bigger inverter waiting to install more panels later)

But if like your usage is too high, and after factoring all additional cost, upgrading is still worth for you... then be it lo... it all depends to your kwh tariff tier and the upgrade price.

if you believe you have potential to increase higher usage in future and your roof has limited spaces, try to get some quotations who can offer highest capacity Panels so that you can leave some spaces on your roof for future expansion.
cheers

I am not sure if the price he gets, but doesn’t seem like a good deal. Coz the panel looks like old stock to me.  Panel size slightly smaller too, unless he has a very limited roof, then better go for bigger wattage. Bigger panel in term  of height. Like this he can reduce the number of panels, like maybe 10pcs with a bigger capacity and perhaps there is some more room for future exploration if needed.

If you are giving an option to choose Hoymiles HMS 2000 vs Hoymiles MIT 5000, which inverter you will go with?

Actually it’s possible to free up space for two panels coz bigger wattage usually translate to longer panels. So we are Looking at about 20cm longer per panel. And with the correct placement, they can free up two panels worth of space.  In a bigger setup, probably more.  Coz usually a roof can take about two row of panels. So there is some space gap for the length to grow but to grow sideways is not possible.

Coz they handle two panels string together with one mppt. Hence higher current is very normal.
Yes. If one unit mit5000, I see lose more pro of a micro should offer.

I don’t thjnk y can mix. Three phase and single phase is not possible at the trunking level iinm

I am going to install 18 panels, which mean I will have 2 MIT 5000 and 1 hms 1000, in this case which choice is better? all hms or mixture of hms and MIT?

https://www.pv-magazine.com/2025/01/20/the-...umulation-zone/

This is an interesting article that studies the correlation between solar panel angles, the effects of dust accumulation, rain fall, and power generation.

The experiment was conducted in a desert environment so certain parameters like dust storms do not apply to us but the effect of how rain fall helps clean and restore the efficiency is rather interesting. Solar detractors and those who are unsure about the feasibility of solar on this forum often cite degradation and the cost of cleaning panels as negatives. As can be seen from the detailed study (refer to link within the article), even after 6 months without rain and severe dust accumulation on the panels, their performance was almost restored after just 2 rainy days.

What is also interesting is that 25 degrees seems to be the optimal angle. 0 degrees is the worst when it comes to degradation due to dust accumulation. You need the angle to help rain water wash away the dirt.

Current bill just under rm400, don’t know if in the long run I will untung,break even or rugi if install it??? lol

Panel 4.64kWp can generate how much kWh per day ?