I asked one of the companies why not use three phase inverter and they said that that can form three phase connection using single-phase microinverter.

Anyone knows if this a viable substitute as opposed to just straight up install three phase inverters?

For context this is for a >9Kwh system

Haha
>9kW system use 1 phase inverter on 3 phase tnb grid supply? Run. Run very far from them.

Which company is this?

It's Pathgreen which I came to know from discussions around this forum.

That would be solaredge.

Or huawei with optimizer.

But both are not cheap and have lots of serviceable parts. Each panel will be fixed with optimizer.

Actually, single phase micro is a better solution for three phase connection for home from my understanding how it is installed. Single phase micro inverters can be balanced between three phase so it’s not really an issue. I have studied how it is installed and it has its advantage especially those with ev.

Last time I was also think like you. Coz why not use three phase micro if the house is three phase. Turns out there are some advantages using single phase over three phase.

But this is for micro only. For string, it must strictly follow the phases to reap the benefit.

It’s on microinverter if not mistaken so It should be okay. Coz they can string two micro on each phase. With 6 inverters, they should be enough for all three phases. So essentially it’s still connected to all three phases.

no idea.

i google online, look like kind important to have optimizer, cause if 1 panel drop efficiency cause by any mean, all other panel will drop together as well.

That’s the benefit of optimizer. But usually due to its cost, not recommended if your house is not really shaded or ur roof is not complicated.

That’s micro inverter. Different from the string inverter I am talking about.

Micro & string have respective pros and cons. Cannot say one is better than the other. Just what suits you better plus what you prefer. If shading is an issue, definitely micro is the way to go.

But shading is non issue for me so string all the way. It is also simpler in terms of setup versus micro.

Solaredge is Israhell company. Who carrying? I go report polis 😂

If installing string inverter + DC optimizer, I think it’ll be more costly than Hoymiles micro. What for. Hoymiles can support 4 panels per micro inverter whereas you need 1 DC optimizer for each panel — just introduce more points of failure.

Not true. Don’t need it if no shading issue. And top of the range string inverters such as Fronius overcome shading issues with their algorithm.

https://youtu.be/TqOw43-hbjc?si=sX4kGADoINEZimLi
Btw Enphase is the king of micro inverters.

Ultimately, it’s 2 different approach. Just a matter of understand pros & cons plus your personal preference. Nothing wrong with either setup.

This post has been edited by Jason: Apr 30 2024, 11:36 PM

Pm boss

TS agen pasang or sales & marketing?

I got question on Inverter choice:
- can the mirco or string inverter be used with Battery Mgmt System in the future (after NEM completion) ?
- I was told we need 'hybrid' inverter. How much extra are we going to pay for this ?
- do you guys prepare your solar system to work with BMS in the future? Or modify your system later (eg change inverter type) when the time come ?
Thanks.

just get a AC coupling battery storage system and hook straight to the DB. Works the same regardless of string or micro invertor



of course dc coupling is more efficient because less conversion losses, ac couple system will have about 10% round trip losses as per tesla powerwall 2 specs.

but if u get a hybrid invertor now and hope to connect straight to dc battery directly after the 10 years NEM period, high chance is the invertor is almost at the end life already haha as warranty for string invertor is usually 10 years unlike micro-invertor standard warranty is 12 years extendable to 25 years

This post has been edited by yeapsc73: May 2 2024, 02:44 PM

why not , they just need to split the microinverters into 3 phases.

The only problem is that they cannot balance it perfectly into 3 phases.

not necessary to balance into 3 phases also as our house appliances also not perfectly distributed into 3 phases, but at least good to have multiple of 3 nos of micro-invertor so input to the DB is more or less balance

but if you can get hybrid inverter now for the same price, or cheaper, why not?

After NEM expires in 10 years, I have an easy straightforward option to plug in a battery to the hybrid inverter. no fuss. I can still deploy AC coupled battery if I want to. Why want to choose otherwise is beyond me if you are going for string inverters.

high usage people kena hammer every month by ICPT charges. see necessary or not. I find it interesting. spending so much to install solar, dont want to do it properly. lol.

This post has been edited by Jason: May 2 2024, 04:15 PM

11am tomorrow registered for GET!
GET

Tak faham. Whats the benefit?

Pay extra 10c per kW capped @100kW to get a green certificate!

get the certificate for what? why would i want to pay extra?