It seems that we are able to skip the 50kW transforner and will have a dirext connection with PEA soon.

I think we also should be able to sell energy to PEA, max 5kW.

Will that work so after my batteries are full, overflow of energy can be sold to PEA.

What function will take care of that?

And also take care of the load I have.

Panels filling batteries, taking care of the load and after that, selling energy to PEA.

Is it working like that? If so, where is the function, in inverter?

Max 5kw, if I can sell 5kW in 3 h, will it be 33 baht?

In a month, perhaps it can be 1000-1500 baht, not so big money.

Now I am off grid but batteries are not enough so it can be good to get some extra power from PEA.

Is there a fixed cost or are there only kWh price?

You'll have to go see PEA. They have all the answers about selling electricity to them.

You need your solar installation inspected and signed off by PEA (and also the local Tesaban, anyway we had to sign off with both). We also provided about a 1" thick A4 book with all the diagram of all the installation and tests and signed off pages that our PEA required to approve the installation. We employed an Electrical Engineer from the university with this job of getting and submitting the required BS to PEA. Seems rates for this are B1000/inverter kW ie 20kW cost B20000, but we talked it down to B15000. Maybe this is a scam, but your installer and local PEA will be able to advise you.

From when I last enquired PEA pay about 2 Baht/unit.

Our inverter was bigger than 5kW so they said we couldn't sell (even though you can program the inverter to only export less than 5kW.)

Best to see your local PEA.

Your inverter must be approved by PEA, and the installation also has to be inspected and signed off with the required drawings and paperwork, as Carly mentioned. In the inverter app you should then be able to set the priorities, house load first, battery charging second, and after that export any surplus to PEA.

The rules also seem to have changed regarding system size. PEA now allows systems larger than 5 kW for your own consumption, including batteries, while export is limited to 5 kW AC per meter. So a larger inverter should not automatically prevent selling anymore, provided the system is approved and the export is limited correctly.

We paid 12,000 baht for the registration and final paperwork with PEA, all handled by the installer.

4 hours ago, Hummin said:

Your inverter must be approved by PEA, and the installation also has to be inspected and signed off with the required drawings and paperwork, as Carly mentioned. In the inverter app you should then be able to set the priorities, house load first, battery charging second, and after that export any surplus to PEA.

The rules also seem to have changed regarding system size. PEA now allows systems larger than 5 kW for your own consumption, including batteries, while export is limited to 5 kW AC per meter. So a larger inverter should not automatically prevent selling anymore, provided the system is approved and the export is limited correctly.

We paid 12,000 baht for the registration and final paperwork with PEA, all handled by the installer.

Hi Hummin. What size was your inverter?

12kW?

Edited August 28Aug 28 by carlyai
Mistake

15 hours ago, carlyai said:

Hi Hummin. What size was your inverter?

12kW?

10 kW inverter, but I do not sell electricity back to the grid, at least not yet.

I think I now have found out that 3 phase smart meter DTSU666 and setting of inverter takes care of that, sothis will work fine.

The need of all the documentation scares me.

A cost about 10,000 for that can be the same as selling electricity 10 years. That seems terrible!

7 hours ago, Anders Eriksson said:

I think I now have found out that 3 phase smart meter DTSU666 and setting of inverter takes care of that, sothis will work fine.

The need of all the documentation scares me.

A cost about 10,000 for that can be the same as selling electricity 10 years. That seems terrible!

What size and brand 3 phase inverter do you have?

Mine is a 20kW Deye.

2 hours ago, carlyai said:

What size and brand 3 phase inverter do you have?

Mine is a 20kW Deye.

Sofar HYD 20KTL 3PH, 2 in parallell

26 minutes ago, Anders Eriksson said:

Sofar HYD 20KTL 3PH, 2 in parallell

2x 20kW in parellel is a big system.

10 hours ago, Anders Eriksson said:

I think I now have found out that 3 phase smart meter DTSU666 and setting of inverter takes care of that, sothis will work fine.

The need of all the documentation scares me.

A cost about 10,000 for that can be the same as selling electricity 10 years. That seems terrible!

Many other threads discussing this but you nailed the consensus. THe plan is terrible as PEA intended it to be. They have less than zero incentive to buy electricity and many incentives not to buy. Self interest rules! Until that changes or they are forced to abide to higher ups, it will never be a viable solution to sell to PEA. Hence the reason why it seems nobody does and that goes for the people that would be eligible if they got certified by PEA.

4 minutes ago, atpeace said:

Many other threads discussing this but you nailed the consensus. THe plan is terrible as PEA intended it to be. They have less than zero incentive to buy electricity and many incentives not to buy. Self interest rules! Until that changes or they are forced to abide to higher ups, it will never be a viable solution to sell to PEA. Hence the reason why it seems nobody does and that goes for the people that would be eligible if they got certified by PEA.

Is it really like this? Are there not many selling to PEA? And what are the reasons for that? Please give me a list for the reasons and a percentage ho big it is

1 hour ago, Anders Eriksson said:

Is it really like this? Are there not many selling to PEA? And what are the reasons for that? Please give me a list for the reasons and a percentage ho big it is

Go read through the Alternative Energy sub forum. This has been discussed in detail. You already stated it doesn't make sense in an earlier post so it seems you grasp why. THe math doesn't work as many things solar. I love my solar setup but went in knowing it was more of a hobby and it might have an ROI someday but without funky math that ROI is many years away.
If you go through all the hoops and costs to get it approved which is far from guaranteed, then you can export 10 units a day is my guess with the info you provided. 10x2 =20 baht! Show me your daily production screenshot and size of your battery as well as when that battery is fully charged. I.e., 48V x 280Ah battery = 13.44 kWh which is fully charged this month by 1pm.

We can then crunch the number but have a feeling you already have but you don't like the results.

Edited August 30Aug 30 by atpeace

10,000 or 20,000 THB to register?

They buy it at have the rate it's worth?

Funny.

Weeell if you go to the local PEA they say there is a HUGE waiting list to approve sells.

It will sort itself out...maybe, but in the meantime my local PEA doesn't know if the line power is 220V, 238v or 234V. 3 phases always different.

Our power comes from Lao, so it's their fault. :)