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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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