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External limiting an GTIL2 SUN-1000G2 with raspberry
Hello suntan. I do not know much about all that stuff your asking about... so no help from me.
Nice setup btw.. never seen so many 2000 watt gtils used at once. I got 2 myself. I’m in the process of letting one of them be supplied by batteries. hey Why not use limiter cables? What are those 2 black boxes bottom left with the yellow on them.. are they charge controller? Also it looks like u are supplying all of those inverters from one power source.. Are u using batteries?
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Not sure if that last reply was directed at me Doin it but here goes anyways....

It would be much easier to control the inverters via Modbus over 232 since the main panel for my house is on the exact other side of the property. That panel in the picture is just a small 100A sub panel that feeds my two EV chargers in the garage. 

You are correct in that the whole setup is fed from batteries. 6 Tesla 1860 modules to be exact (3s2p). 

I have a fairly large PV setup (15Kw dc) and with my rate plan with my local utility my on peak usage (3pm - 8pm) is expensive and I also get hit with demand charges. Goal of the whole project is to be able to charge up the batteries (only using 80% SOC down to 20% SOC to preserve cell health) during the night and day and then let the GTILs work from 3p - 8p so I can have my home at a decent temperature (live in Phoenix Arizona) and I am not screaming at the wife / kid whenever they turn something on. 

Oh and the two boxes in the lower left are some 48Vdc power supplies connected to some CVCC boosters used for charging. 


RS232 -> USB adapter should be here this weekend, Going to attempt to fire up a mod-bus connection, will keep you guys posted. 

Sorry for the lack of structure, just now enjoying my morning cup of coffee.
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You may want to add a few cm of space between the backboard and the GTI to improve airflow and increase passive cooling.
Particularly the horizontally mounted GTI will not enjoy any natural airflow (no chimney effect), making the cooling fins at the back near useless.
Modular PowerShelf using 3D printed packs.  40kWh and growing.
https://secondlifestorage.com/t-AJW22-s-...PowerShelf
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(09-29-2019, 12:50 AM)ajw22 Wrote: You may want to add a few cm of space between the backboard and the GTI to improve airflow and increase passive cooling.
Particularly the horizontally mounted GTI will not enjoy any natural airflow (no chimney effect), making the cooling fins at the back near useless.
Agreed. Going to place some standoffs behind the heat fins after I get everything dialed in. Working on the Modbus 232 communication with the GTILs and some interfacing with the Tesla BMS modules. I should write up a fill blog post on the setup when it's finished.
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@sogorman

For the run from the main panel to sub panel you could use CAT5 or CAT6 wire. I ran CAT5 from my main panel to my GTILs (4 of them), around 40-50' in distance. CAT5 has 4 twisted pair of wires that mate up nicely to the 4CT Clamps. Been in place roughly a year without issue.
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Update, thanks to @ZARK I was able to communicate with the controller of my GTILs using the RS232 specs he provided. Working on finding the registers for controlling the generation limit / amount so I can remotely control.

(08-06-2019, 03:25 AM)ZARK Wrote:
(08-05-2019, 12:24 PM)watts-on Wrote:
(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:


Thanks very much for your responce Smile . You have been very helpful. The pin out diagram was very useful. I have now manage to connect and communicate with the inverter Cool , although I cant make much sense of the data. I was successful with a modbus tcp client. I want to monitor the inverter using openhab2.  The modbus binding for openhab support tcp client anyone knows how to set this up. had no luck thus far Confused




@ZARK and @watts-on are you able to read registers greater than 198? I am able to communicate with the inverter but only able to access registers up to 198 with ModLink VCL Demo. Most of the 'good stuff' on the inverter is in the high 200 register range.

Also if anyone need this or if it helps, this is the modbus documentation I am going off of for the inverter... sorry about the chinese. Better than nothing.  

https://drive.google.com/open?id=1QmXChLB3xM4ilQgnIhnX8HtPADPAMqL_
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@sogorman

A while back I tried to find any modbus write cmds, but concluded that the external modbus port must be read only (maybe for security?). I believe the controller board inside for the display has a CAN/Modbus port that might allow for write cmds. Also I've attached an additional Modbus doc in Chinese , you might have better luck than I did.    

(10-02-2019, 01:03 AM)sogorman Wrote: Update, thanks to @ZARK I was able to communicate with the controller of my GTILs using the RS232 specs he provided. Working on finding the registers for controlling the generation limit / amount so I can remotely control.

(08-06-2019, 03:25 AM)ZARK Wrote:
(08-05-2019, 12:24 PM)watts-on Wrote:
(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:


Thanks very much for your responce Smile . You have been very helpful. The pin out diagram was very useful. I have now manage to connect and communicate with the inverter Cool , although I cant make much sense of the data. I was successful with a modbus tcp client. I want to monitor the inverter using openhab2.  The modbus binding for openhab support tcp client anyone knows how to set this up. had no luck thus far Confused




@ZARK and @watts-on are you able to read registers greater than 198? I am able to communicate with the inverter but only able to access registers up to 198 with ModLink VCL Demo. Most of the 'good stuff' on the inverter is in the high 200 register range.

Also if anyone need this or if it helps, this is the modbus documentation I am going off of for the inverter... sorry about the chinese. Better than nothing.  

https://drive.google.com/open?id=1QmXChLB3xM4ilQgnIhnX8HtPADPAMqL_


Attached Files
.pdf   Modbus RTU Protocol 宁波德业V100.pdf (Size: 1.86 MB / Downloads: 20)
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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
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