Thread Rating:
  • 0 Vote(s) - 0 Average
  • 1
  • 2
  • 3
  • 4
  • 5
External limiting an GTIL2 SUN-1000G2 with raspberry
So on the gtil forum they are saying that if I don’t have batteries I don’t have to limit the watts. Seems not good to let the inverter get to max, but a lot of ppl have been doing it for yrs with an oversized array and not limiting watts in the settings. I want 2 more panels so I get more watts on cloudy day. My panels are series and parallel. 33v each, 66v total, 9amps each , 27amps total. With 2 more panels my volts will stay the same but my amps will raise to 36
Reply
(04-30-2019, 01:36 PM)Doin it Wrote: So on the gtil forum they are saying that if I don’t have batteries I don’t have to limit the watts. Seems not good to let the inverter get to max, but a lot of ppl have been doing it for yrs with an oversized array and not limiting watts in the settings. I want 2 more panels so I get more watts on cloudy day. My panels are series and parallel. 33v each, 66v total, 9amps each , 27amps total. With 2 more panels my volts will stay the same but my amps will raise to 36

Quote: I want 2 more panels so I get more watts on cloudy day
Got it sounds good. I guess if the forum says don't limit then its up to our personal discretion.
I have mine set to 900 Watts each which seems to work out perfect.
Caught this pic while the sun was out and very happy with the results. both L1 and L2 are independent of each other.
Also with 1 GTIL2 1000 I would have never been able to get over 1kW of production. Of course you have the 2000 Watt version.
Note: I have seen both combined outputs as high as 1.8kW but just for a short period of time.
Wolf
Solardad likes this post
If 18 X 650 = 2200+mAh then we have power! 
May all your Cells have an IR of 75mΩ or less Smile
Last count as of 5/19/2019
Total Number of Cells                          5263
Cells  >80% of Capacity                      3703
Cells <80% of Capacity                       1535
Cells ≥2200mAh & ≥ 80% & ≤75mΩ    2563
For Info Google Drive
Not your average Wolf       
            Cool



Reply
They say u don’t have to limit inverters max if u power with solar directly. But with batteries yeah it’s a necessity

Cool man I’m glad the 2 inverters are working like u want
Reply
(04-19-2019, 08:40 PM)Wolf Wrote:
(04-19-2019, 08:13 PM)Doin it Wrote: Wish we woulda figured that out sooner, I already bought the 240v version and it’s hooked up and running. I think my loads are balanced fairly well tho.
So wolf how did u wire to your breakers?  Are u running the inverters at 120v now instead?

I am running them at 120V each with CTs for each one individually. Same breaker 20 Amp 240V. Obviously 1 GTIL is on L1 and the other one on L2 Working great.
Check out my emoncms.org dashboard https://emoncms.org/dashboard/view?id=53517
Also you can check out my Grafana dashboard on my home server. Got to log in though as guest and password is guestw
http://wolftech.mynetgear.com:4562 

Wolf

Hi Wolf - Dashboards look great!.

I think you leverage have a battery bank with your system..?.? Have you tried to measure / monitor the voltage of the pack with Iotawatt? I am thinking of setting up a similar monitoring system. Thanks
Reply
(05-07-2019, 09:58 PM)Solardad Wrote: Hi Wolf - Dashboards look great!.

I think you leverage have a battery bank with your system..?.? Have you tried to measure / monitor the voltage of the pack with Iotawatt? I am thinking of setting up a similar monitoring system. Thanks

Thanks Solardad

Ah the monitoring of Battery Voltage yes that is an issue. Unless I am missing something really obvious The IoTaWatt only does CTs and 1 Voltage input for line AC which is supplied by a calibrated Transformer. I just 2Xed it to get my 2 phase V of ~240.

The Emon system seems to allow for battery V measurement with their system I think.

For battery voltage measurements I am in the pre breadboard stage and collecting parts. I will be using an Arduino to measure Battery V using a V divider and a Shunt to give me my Amps to and from the battery. Once that is accomplished I hope to send the data over wifi to my local influxdb and be able to chart it. I am watching and learning a lot about how to do it and if successful will publish here. I still have to figure out all this about ESP32, ESP8266 etc etc  C++ AT commands and so on. Ha I remember AT commands from my modem days to get on to the internet.
On another note once I get my Li-ion packs built I will more than likely get a Batrium system and I believe then that info can then be ported to my influxdb.

Wolf
If 18 X 650 = 2200+mAh then we have power! 
May all your Cells have an IR of 75mΩ or less Smile
Last count as of 5/19/2019
Total Number of Cells                          5263
Cells  >80% of Capacity                      3703
Cells <80% of Capacity                       1535
Cells ≥2200mAh & ≥ 80% & ≤75mΩ    2563
For Info Google Drive
Not your average Wolf       
            Cool



Reply
I’ve figured out how the fella on eBay makes the dual CT cables. So if anyone is interested let me know. Also wolf I have figured out why exactly we have to flip one of the cts with the 240v version. Makes perfect sense now as to why the 240v inverter does not backfeed as long as main panels loads are not more than 75% different leg to leg
Reply
(05-09-2019, 12:47 AM)Doin it Wrote: I’ve figured out how the fella on eBay makes the dual CT cables. So if anyone is interested let me know. Also wolf I have figured out why exactly we have to flip one of the cts with the 240v version. Makes perfect sense now as to why the 240v inverter does not backfeed as long as main panels loads are not more than 75% different leg to leg

Excellent yea I also took the CTs wiring apart and found a resistor in there. Didnt look any further though as I was busy hooking up my 2nd GTIL.
Its sitting on my bench for further study when I get a round tuit. Tongue

So since my mains had a greater than 75% difference between the 2 legs I was having issues. Makes sense.

Wolf
If 18 X 650 = 2200+mAh then we have power! 
May all your Cells have an IR of 75mΩ or less Smile
Last count as of 5/19/2019
Total Number of Cells                          5263
Cells  >80% of Capacity                      3703
Cells <80% of Capacity                       1535
Cells ≥2200mAh & ≥ 80% & ≤75mΩ    2563
For Info Google Drive
Not your average Wolf       
            Cool



Reply


Who read this thread?
100 User(s) read this thread:
hbpowerwall, Chickey, daromer, Sean, mike, Joaquinsfy, NiVa, owitte, ken, dakoal, ruby2, JustJim, Korishan, A + A, P.Tasyo Powerwall, PAF, nikitto, Franky Beuselinck, Batrium, Scepterr, Mike C, eAnic, jdeadman, charlie246, camils, wim, frnandu, Jeremy Choy, 1958 greyhound, neilmc, Ragulin83, tbostjan, watts-on, Dan Lim, jesusangel, Daggerzz, Hanssing, kot, quake101, Joost2, Stefaan De Ridder, systemtm, Al's Shed, KtB, netmonk, Seedser, Mazlem, ivnz, Chris Davis, iceisfun, Geek, Rad, Jon, jamesk9, floydR, Wodys, AlexCPU, SimonW, Learjet, DarkRaven, karrak, tomganleylee, Grumplestiltskin, burtyb, DCkiwi, Stuart Pittaway, dougal, aflecha, mormor1971, Tostaki, tocan, teslar, roland, techzack, howiegrapek, cristof, WardenCommader, Florian Chambrier Donnadieu, Oderus420, Oz18650, accoelho, neurocis, tocool24, bres55, Brett Walsh, bzzt, revolting, lukose, paz45, demko, donj51, Antony, CarelHassink, cmg_george, macallazack, Pavel Razzorenov, Filip, soulwarrior, Cody2o0, Sam Lind

Forum Jump:


Users browsing this thread: 4 Guest(s)