lom

Read your meter twice or thrice a day. 8am, 4pm and optionally midnight for week and you will know your energy usage during daytime and nighttime. I don't want to guesstimate what you need since I don't know how power efficient your aircons are, nor do I know how well isolated your house is or which temperature you have set the aircons to.

Btw, the reason for the Neutral getting skewed/offset is that there is no Neutral on the high-voltage side, it is created on the low-voltage side of the transformer and its position as a middle point between phases is dependent on the transformer getting all three phases. With only two high-voltage phases, the Neutral will move its position.

I don't think it is but if it is it doesn't change anything. The picture does not show "both remaining phases working perfect" it shows one perfect phase and two phases which would have been at 105V each if they were loaded equally by all consumers on the low-voltage line. They are not equally loaded and that will create a skewed Neutral which easily burns equipment for customers. Three single phase protectors like you have does not help against that, you need the type of phase protector/guard that Crossy showed in his post.

Its main advantage is that it can be easily stored. One of the disadvantages from burning gas and oil in order to produce electricity is that oil and gas prices are globally set and the price Thai consumers pay per KWh is therefore too dependent on that.

The above is loss of one phase on the high-voltage side and the two remaining phases will only give correct voltage on one low-voltage phase. The neutral from the PEA high to low voltage transformer will become skewed and can cause destroyed consumer electronics. When you have a 3-phase supply you also need a phase guard that disconnects all 3 phases when 1 phase is out.

I assume you mean deep cycle batteries. If they are of lead-acid type then they have quite limited lifespan unless you make sure you don't get below 50% depth of discharge so it could have been the reason for replacing them. If they were old type Li-Ion batteries then it sensible to replace them with LiFePo4 batteries for safety reasons regardless of their condition..

It was not a grid frequency problem, it was a problem with the frequency of grid reconfiguration. They occurred to fast, were to many to many in a short time period making the grid voltage going quickly up and down (oscillating). They just had a bad algorithm for the automatic grid reconfiguration.

I guess you didn't understand this:

The Shinawatras seem to have forgotten 2006

Well then the terminal block has no additional electrical function except that it also grounds the DIN rail. Without it there would had been a grey stopper block there as there is on the left side.

The yellow-green colour tells that there should be an earth wire connected. There is no indication on the surge protector that it has to be earth connected.

I'm not a big fan of breakers within a battery case and also not a big fan of small DIN mounted double width DC breakers when it comes to higher current. All my battery packs/stacks use only the external wall mounted bigger MCCB type breakers which have a bigger connection surface and a bigger M6 bolt.

Both settings do import from the grid when needed (grid-assist). Load and Grid are electrically the same but can be divided into two zones with the CT's , before CT and after CT seen from the inverter. Zero Export to Load doesn't export at all. Zero Export to CT exports to any device connected between CT and Load terminals (before CT zone) like for instance a high consuming EV charger that you don't want to be connected to the Backup/EPS terminals. The CT will in that case allow export to the before CT zone but will restrict export to the after CT zone. I have only seen ghost import, no ghost export. Mine is just below 1KW/24h and it disappears when II isolate the system from the grid.

You get supplemental power from the grid. Same as for "zero export to CT"

Deye uses the Pylon protocol to speak with a master BMS over CAN and the masters uses RS-485/Modbus to speak with the slaves. I'm not sure if you can have one brand of BMS as Master and another brand as slave but if you use all your batteries as slave then Deye can speak with all of them over RS-485/Modbus and you will be able to see each battery's parameters/status in the Deye battery setup.