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External limiting an GTIL2 SUN-1000G2 with raspberry
Got it.

Back burner project for now.
I would be interested to see how your power flows on L1 and L2 maybe at some point you could measure your L1 and L2 with independant CTs and see if you get any negative values on either of them.

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U asked how u would measure single phase on a split phase system..The power coming into your houses meter and out of your houses meter is single phase, the wires the cts go around is single phase. Unless u use the ground that comes from the center tap on the tranformer.

If I measured with independent cts (anotherwords measuring each phase separately) it would most likely show the same results u had which is that it would show as if it was backfeeding due to using 240v single phase inverters and reading at 120v but it’s not cuz 240v ecompany meter.. single phase 240 there is just ground, just like the 240v single phase inverters supply. The power alternates (ac current)back and forth .. It works same as the power we need for individual phases comes from the wires coming into our meter and to the separate legs and doesn’t oversupply the opposite leg. Although we need a limiter ofcourse.
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Hello all. Having read the entire tread I am still lost concerning remote monitoring of this GTIL inverter. I have a GTIL2 1000 watt inverter ver 5.1 with the DB9 connector for remote monitoring.
however i do not have the wifi plug unit. I want to remote monitor my unit localy and not go to the chinese cloud. It seems some have done this here in the thread. I would like some help to do the seem please :-). First of, which standard/protocal does it use rs485 or rs232 with modbus. The manuel seems to imply 485. Or can it use both. The pin out for the DB9 connector on the unit would be helpful. I have a wifi RTU unit (model USR W630) that i want to use to connect it to my network and then monitor using openhab2 with the modbus binding. I cant get it work :-( any help Please. Thanks
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Does anyone have any suggestions how to make one of these inverters stay master and one slave. I have 2 240v inverters that switch between master and slave very often. Ofcourse one cable that has 2 ct clamps to 2 inverters is what I’m using. It works great, inverter tries to supply all the loads and whenever it can’t the other inverter kicks on and helps but the first inverter could be either inverter at any time. I need one inverter to stay primary-master everytime.
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(08-05-2019, 04:11 AM)Doin it Wrote: Does anyone have any suggestions how to make one of these inverters stay master and one slave. I have 2 240v inverters that switch between master and slave very often. Ofcourse one cable that has 2 ct clamps to 2 inverters is what I’m using. It works great, inverter tries to supply all the loads and whenever it can’t the other inverter kicks on and helps but the first inverter could be either inverter at any time. I need one inverter to stay primary-master everytime.

Please make a new thread with this question.
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(08-04-2019, 06:57 PM)ZARK Wrote: Hello all. Having read the entire tread I am still lost concerning remote monitoring of  this GTIL inverter. I have a GTIL2 1000 watt inverter ver 5.1 with the DB9 connector for remote monitoring.
however i do not have the wifi plug unit. I want to remote monitor my unit localy and not go to the chinese cloud. It seems some have done this here in the thread. I would like some help to do the seem please :-). First of, which standard/protocal does it use rs485 or rs232 with modbus. The manuel seems to imply 485. Or can it use both. The pin out for the DB9 connector on the unit would be helpful. I have a wifi RTU unit (model USR W630) that i want to use to connect it to my network and then monitor using openhab2 with the modbus binding. I cant get it work :-( any help Please. Thanks

It's a while since I dabbled with this, but here is some info and images I created at the time if it helps:

The interface is RS232:



The essential functions of the interface board:
 

The 8 pins on the left represent the ribbon cable from the main board.  The 9 pins on the right represent the RS232 D connector.  The centre pins are the connections to the RS232 level shifter IC (charge pump etc components not shown for clarity).
I'm not sure what the connection to pin 9 on the D connector is, but I suspect it is to provide power to a wifi type dongle, so watch out for that if what you connect to it is not expecting that as that is not standard on an RS232 connector.

Some screen shots of settings I used in a modbus application:

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Yeah I would make a new thread but it seems this thread that is getting most attention and if u read this thread most of it consists of info on other issues than what the thread was started about. I’m not that technologically advanced..lol, how do I make a new thread ?
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I am sorry for silly question, but is it possible to connect it directly to ESP8266/32 ? Or what converter I need? I have SUN-1000G2 without WIFI adapter.
Thank you
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(08-05-2019, 02:15 PM)Doin it Wrote: Yeah I would make a new thread but it seems this thread that is getting most attention and if u read this thread most of it consists of info on other issues than what the thread was started about. I’m not that technologically advanced..lol, how do I make a new thread ?
I haven't seen the other posts that aren't according to OP, but I have seen this one.

If you look at the forum sections, there's a big button that says "Post Thread"

The reason to make a new thread with the question is if someone else has a similar problem. They may not figure that this thread (which is about limiting the GTIL) has any information in about Slave/Master mode.
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Completely understandable korishan. The master slave issue I need help with might very well be directly related to the limiting process. I started a thread about it. If anyone in here has info regarding how to make these inverters permanently act as master or slave, I would appreciate the help. The pic is what I’m trying to do.
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