I am considering 13 X 4 meter solar structure, and I am looking for a contractor in the Taling Chan area of Bangkok. Does anyone have a recommendation?

I also have a question about three phase. With three phase, would the panels not be in multiples of three, or does the power from the panels get "divided" in the inverter(s)?

7 minutes ago, Yellowtail said:

I also have a question about three phase. With three phase, would the panels not be in multiples of three, or does the power from the panels get "divided" in the inverter(s)?

The panels/batteries provide DC and DC doesn't have "phases" so it's effectively all in one lump.

The inverter(s) then convert the DC to 3-phase AC, same voltage for each phase but the energy is divided between the phases as required by the load each phase sees. Generally one tries to keep the phase loads roughly equal, it's not vital but will keep your inverter happy.

7 minutes ago, Crossy said:

The panels/batteries provide DC and DC doesn't have "phases" so it's effectively all in one lump.

The inverter(s) then convert the DC to 3-phase AC, same voltage for each phase but the energy is divided between the phases as required by the load each phase sees. Generally one tries to keep the phase loads roughly equal, it's not vital but will keep your inverter happy.

That makes sense, thanks!

I have a guy quoting Aiko inverters and panels. Is this considered good equipment?

QTY of 1, Sun-10K-G03 inverter

QTY of 17, Aiko N-type ABC Module, Comet series, 670W

Would that not overload the inverter?

3 minutes ago, Yellowtail said:

I have a guy quoting Aiko inverters and panels. Is this considered good equipment?

QTY of 1, Sun-10K-G03 inverter

QTY of 17, Aiko N-type ABC Module, Comet series, 670W

Would that not overload the inverter?

Looks like an on-grid inverter, not a name I've come across.

17 * 670W = 11.4kW, that should be well within the capability of a 10kW inverter (you never get the rated panel wattage anyway).

Spec. here https://www.thaisolarsystem.com/product/1156/inverter-on-grid-tmda-%E0%B8%A3%E0%B8%B8%E0%B9%88%E0%B8%99-sun-10k-g03-%E0%B8%82%E0%B8%99%E0%B8%B2%E0%B8%94-10k-3p-ct-%E0%B8%9B%E0%B8%A3%E0%B8%B0%E0%B8%81%E0%B8%B1%E0%B8%99-10-%E0%B8%9B%E0%B8%B5 says it's on the approved lists.

I would encourage you to get a hybrid inverter so you can add batteries later, unless you intend selling energy back to MEA/PEA in which case you will need an inverter on their approved lists.

1 hour ago, Crossy said:

Looks like an on-grid inverter, not a name I've come across.

17 * 670W = 11.4kW, that should be well within the capability of a 10kW inverter (you never get the rated panel wattage anyway).

Spec. here https://www.thaisolarsystem.com/product/1156/inverter-on-grid-tmda-%E0%B8%A3%E0%B8%B8%E0%B9%88%E0%B8%99-sun-10k-g03-%E0%B8%82%E0%B8%99%E0%B8%B2%E0%B8%94-10k-3p-ct-%E0%B8%9B%E0%B8%A3%E0%B8%B0%E0%B8%81%E0%B8%B1%E0%B8%99-10-%E0%B8%9B%E0%B8%B5 says it's on the approved lists.

I would encourage you to get a hybrid inverter so you can add batteries later, unless you intend selling energy back to MEA/PEA in which case you will need an inverter on their approved lists.

On grid, yes. I am not interested in selling back, and I may want to add batteries in the future or even now.

Budget quote is B194K for the solar, and B62K for the free-standing structure.

Before I pull the trigger on the solar, I want to track my usage for a few months. I do not have historical data, because we are in a new house, we are in the process of upgrading to three-phase, and we are installing all new air conditioners.

I'd like something that I can at least track peak kw and kwh per day, per phase, and cumulatively.

Do these typically come with a app/website to view and store the data?

I was looking at the Shelly Pro 3EM, but the couple of videos I watched were not real helpful with the software and what I want to do.

Shelly Pro 3EM DIN Mountable 3 Phase Energy Meter Photovoltaic Rady Reports Accumulat Energy Instantaneous Voltage Current Power | Lazada.co.th

Any suggestions? I like cheap, but I like easy better...(gotta be a joke there)

Thanks!

Looks like I get my new meter on Tuesday or Wednesday.

I ended up ordering this Emporia Vue 3 energy monitor from Amazon. Free shipping, so with tax and duty, $234.50 delivered. This will let me track 16 separate circuits, which should cover all my AC and hot water.

On 1/23/2026 at 8:22 AM, Yellowtail said:

I have a guy quoting Aiko inverters and panels. Is this considered good equipment?

QTY of 1, Sun-10K-G03 inverter

QTY of 17, Aiko N-type ABC Module, Comet series, 670W

Would that not overload the inverter?

Im qouted 32 panels on a 10kw inverter.

On 1/24/2026 at 2:07 PM, Yellowtail said:

Before I pull the trigger on the solar, I want to track my usage for a few months. I do not have historical data, because we are in a new house, we are in the process of upgrading to three-phase, and we are installing all new air conditioners.

I'd like something that I can at least track peak kw and kwh per day, per phase, and cumulatively.

Do these typically come with a app/website to view and store the data?

I was looking at the Shelly Pro 3EM, but the couple of videos I watched were not real helpful with the software and what I want to do.

Shelly Pro 3EM DIN Mountable 3 Phase Energy Meter Photovoltaic Rady Reports Accumulat Energy Instantaneous Voltage Current Power | Lazada.co.th

Any suggestions? I like cheap, but I like easy better...(gotta be a joke there)

Thanks!

Also track voltage during peak hours and see the drop especially when you start showers and ac units at the same time, and even water boilers. You might need voltage regulator if the drop is significant to protect your inverter and batteries, as well AC´s, tv´s and also fridges and freezers, ,,,

8 minutes ago, Hummin said:

Im qouted 32 panels on a 10kw inverter.

How many watts are the panels?

8 minutes ago, Hummin said:

Also track voltage during peak hours and see the drop especially when you start showers and ac units at the same time, and even water boilers. You might need voltage regulator if the drop is significant to protect your inverter and batteries, as well AC´s, tv´s and also fridges and freezers, ,,,

Right now, I just plan to use it to size my system and decide if I want batteries or not.

3 minutes ago, Yellowtail said:

How many watts are the panels?

Right now, I just plan to use it to size my system and decide if I want batteries or not.

620W panels the last offer.

3 minutes ago, Hummin said:

620W panels the last offer.

Are you buying batteries? That seems like a lot of panels.

1 minute ago, Yellowtail said:

Are you buying batteries? That seems like a lot of panels.

Yes, two 10kw batteries to start with, 18kw capacity

7 minutes ago, Yellowtail said:

Are you buying batteries? That seems like a lot of panels.

44 minutes ago, Yellowtail said:

Looks like I get my new meter on Tuesday or Wednesday.

I ended up ordering this Emporia Vue 3 energy monitor from Amazon. Free shipping, so with tax and duty, $234.50 delivered. This will let me track 16 separate circuits, which should cover all my AC and hot water.

Is this unit suitable for use on 230V 50Hz??

9 minutes ago, Crossy said:

Is this unit suitable for use on 230V 50Hz??

Yes, up to 264VAC L-N, 50/60 Hz. This is the email response I got from their live customer support staff to the questions I asked:

 

Hello XXXXXx, thank you for your interest in the Emporia Vue Energy Monitor! To answer your questions:

 

1) Based on the Amperage/Voltage/Etc. info you provided in your first email, yes, the monitor is compatible with this electrical panel.

 

2) The 200A CTs will have no problem going around 2AWG / the 50A CTs have an internal window diameter of 10mm and 2AWG insulated wire has a diameter of about 9.6mm so it would be close.

 

3) We do have a circuit merging feature in the app. So by default the CTs will show readings for all 3 legs of the 3phase circuit separately, but you can merge them into a singular readings with one overarching circuit name in the app for easy data readings.

 

4) If the 3 Phase Circuit is a Balanced Load across the 3 phases, then you can monitor one circuit line and in the app we have a setting called "Multiplier" so you can change that from the default of 1x to 3x to account for the 2 unmonitored circuit lines. If it is an unbalanced load, then you really should monitor each line and merge them.

 

5) We don't have an add on perse, but you are able to install multiple energy monitors in the same electrical panel and then we have a Vue Combining feature in the app which will get the UI to display them as a singular monitor with an extended circuit list.

 

6) Hourly, Daily, Weekly, Monthly, Yearly data is stored indefinitely in the Emporia Cloud, and is viewable on the Mobile App and Desktop (at web.emporiaenergy.com) Seconds data is stored for 3 hours at a time, and minutes data is stored for 7 days at a time. If you need to keep a 3 hour seconds chunk or 7 days of minutely data, we do have the ability to export the data into a CSV file so you can run an export during times when needed. Local Storage will also be released at a later date/

 

7) Can export to CSV for Excel, etc.

 

8) The antenna is supposed to be outside of the electrical panel, or it can be placed behind drywall if the panel is in the wall. Just outside of the metal panel is highly recommended. If needed, there is an ethernet port.

 

22 minutes ago, Yellowtail said:

Yes, up to 264VAC L-N, 50/60 Hz. This is the email response I got from their live customer support staff to the questions I asked: 

It's always worth asking, way too many people have ordered stuff from the US only to get a pop and a whiff of Magic Smoke ☹️

20 minutes ago, Crossy said:

It's always worth asking, way too many people have ordered stuff from the US only to get a pop and a whiff of Magic Smoke ☹️

Absolutely. Been there, done that. Fortunately, most of that was while i was working, and spending company money.

I let you know how it goes.

I received the monitor today and I'm really impressed with the look and feel, seems very robust.

Should get the 3ph meter this week!