MDJGyurgeiz said:Thank you very much. do you think you could think of amplifying the signal near the clamp and with a trimmer calibrate it to compensate for the longer cable length? but what board are you preparing that would work?
Doinit said:Aminet why are u grounding your ct. also when using 2 cts one on each phase there is only 1 way to make the cable like I described above. Or am I wrong? When u get a second inverter u need to just parallel another 2 prong connector to second inverter. cable constructed like I said above. Its odd how the inverters switch back and forth between master and slave. Im trying to figure out how to dedicate one inverter as master all the time. Then install batteries on second inverter so that second inverter-batteries only get used when first inverter needs help with loads,Therefore prolonging batteries lifespan and keeping them charged more often.
aquaman said:I accessed the modbus a while back in this thread. Most of the registers seem to be nops. The only interesting data that I could access was the wattage being output.
If anybody else has better luck, please share
I have better luck sniffing the LCD display frames
aesanto said:Hi to all
After reading carefully all posts, and with the knowledge adquired, i've managedto hack the LCD communication protocol and now I'm able to control the Inverter with an ESP8266 via WIFI.
But it not works perfectly. As at every power change it goes to zero before reach the target power.
I'm trying to understand why but so far no progress.
Also I need to decode the remaining protocol in order to get the values showed in LCD. For now i'm working without LCD.
As i understood, there is a frame of bits sent from LCD to the Inverter.
Over there there are some of them witch are the value of power limiting that we can set on LCD.
Changing this ones I can control the Inverter.
In the attached excel you can find the data and how i decoded the important bytes.
Lets see if can make this work smoothly.
Doinit said:You can have both inverters running off of the batteries and the inverters will use the available pv power before they use battery power.
If u insist on having one inverter powered by pv and other powered by battery, then you can try to put the limiting cables at different locations to try and get one inverter to be primary. --- I have a external limiter with two outputs (from 2 inverters)
Are you using the newest version, the GTIL2? --- yes
Also you could go to the GTIL forum on Facebook to get more advice for these inverters --- the facebook group use a mix language english and indian or something else
what facebook group you say ?Doinit said:Can u use the internal limiter of the GTIL2 instead of the external limiter? The group does have mixed language but also has a see translation.
The only way I know to designate a primary with these inverters is to place current sensors before or after the other depending on what they are connected to.. separating loads etc.
Doinit said:You do not need to use the external limiter with the GTIL2.
Search Facebook using GTIL2 as keyword
I don't know if any of the units are fitted with RS485, but the best way to sure is to check the interface board and google the chip. I'm sure you will find it is an RS232.kmsj13 said:Mine is GTIL v1.2, does the DB9 Port labeled with REMOTE is RS232 or RS485?
I also use this unit - and was looking into controlling the output. From what I learned so far :
- My box has a RS232 output, same board as shown in the last post from kmsj13 (the chip is a MAX3232).
- Could confirm the 4 pins being used (pins 2,3,5,9).
- On pin 9 some 12.x volts against pin 5 (ground).
- I can control the power output (Watts) by using a 5kohm poti when connected to the normally not used, open 2 pin socket, in the row of sockets where the externel sensor cable also goes to (see the 2nd picture from 12-31-2017, 12:10 AM, from rolands post, the black and red cable). Did not need to connect anything else to ground so.
- This control is possible only when the "Limit Mode" checkbox is NOT checked.
That is what I could confirm on my box.
- Use a MCP4132 as Digi_Pot controlled by a Raspberry PI (I think I get this to work).
- For current meassuring I will use ACS758LCB-050B modules, where the analog (out2) signal is converted by a ADS1115 to I2C on the Raspberry.
Question: Did I overlook a translated version of the "Eybond Modbus RTU Protocol V100" document ? Since I did not yet get the RS232 interface to talk to me yet, so I assume I do something wrong. Does anyone know of a quick test (some confirmed string to send) for this interface?
Your help is greatly appreciated.