Connecting 2 2kW grid tie inverters with limiter in parallel. Power source - 23.5kWh LiFePo4 bank.
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- เผยแพร่เมื่อ 22 ก.ค. 2024
- Make 2CT sensors wire: • Updating CT cable for ...
Building 23.5kWh LiFePo4 battery bank: • Building 23.5kWh batte...
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timecodes:
00:00 - Intro
01:39 - wires connection
3:01 - 2 inverters connected to AC power
3:56 - CT sensor wiring mismatch between inverters
4:41 - splitting cable to 2 connectors
7:30 - testing CT cable
10:25 - overview
Good video again. Very interesting that you needed to switch the aero connector wires
I have been searching for a clear explanation for almost a year, 🙏🏾 THANK YOU 🙏🏾
you are welcome! thanks for the feedback.
@@SolarEngineering is this applicable for multi ground grid. L is 240V while N is neutral?
@@earlnicolasnicolas6041 for single-phase systems you need only 1 CT sensor located on L. So no modifications need to be done. Inverter should work right out of the box.
Thank you. I've been waiting for a video on this!
Very nice! Great explanation too! Thank you!
Great video thanks. Would love to build a power wall like yours.
thanks
good to know ! di you ever extend your limiter sensor? if yes what cable should i use to extend it? because i have to put the inverter like 25 yard from my smart meter
Good job my friend... Here's my full support for you... God bless....
#solar lover
thanks
Great video thank you. I also have two of the units. May try your method
this setup works great for me, I had some issues with backfeeding, found another way to do CT cable, since then didn't have any issues. I added a link for video to the description.
@@SolarEngineering perfect thank you
Deye 3 kw inver ile bu göstermis oldugunuz inverter birlik de bu sekilde yapsam olur mu
Excellent tutorial! Just what I need. Question: You have to manually set the menu options in each inverter to be the same right? There is no master/slave arrangement?
Specifically, I'm wondering how would the input-side "current limit" & "voltage limit" work if these values are set differently in each inverter.
Hi, correct 2 inverters fully independent, you could set individual settings for every inverter. For example, inverter #1 could be limited to 1kW output and shut off when battery dropping to 50V, inverter #2 could do full output (2kW) and shut off when battery voltage will drop to 49V.
My SUN-2000W GTIL2 will not save settings after correct operations. Any ideas as to how to factory reset, or correct the problem. THANK YOU. Cliff
Then what if there are 5 or 7 inverter need to be all paralel ?
I opened up my GTIL inverter and found it has a very clean layout inside. So I would open the new inverter and physically reverse the pins on the "Internal" limiter connector from the inside. That way, the two inverters have uniform polarity on its internal limiter port which will greatly reduce confusion later. There is a TH-cam video showing the GTIL inverter with its front case removed and it shows the sensor connectors from the inside:
th-cam.com/video/_vaPt-OTQk4/w-d-xo.html
This video also shows a "hidden" connector in the GTIL inverter that allows you to *directly* control the inverter's output via 5k potentiometer or via a microcontroller if you want to implement your own governor -- something I might do later.
i did this too like 3 years ago but i had nothing but problems, sometimes it seems fine then other times it puts to much power to the grid or way to little, it was real random, i found just having each unit use their own clamp sensor was more reliable, i just have 4 clamps all on the same main cable but spaced slightly apart, then i used normal cat 8 ethernet cable to extend the length by 30m
Did the 30Meter length cause any problems? I have two 1000Watt 120VAC units I intend to put one on each leg of my North America split-phase system each with its own CT sensor (limiter). I need to extend the cable length on each sensor to 25 feet (7.6 meters).
@@benkanobe7500 nope, its been working sweet, the only problem i ever got was when i connected all inverters to one clamp sensor, they need there own clamp sensor to work right or you get random inverters doing random things, like pumping in too much power or not enough, the cat 8 cable has enough wires inside to connect upto 4 sensors and the cable is made for low noise so its perfect and cheap.
@@Yahgiggle Thank you for your helpful information derived from experience.
@@benkanobe7500 sweet as
Как хорошо, что нашел это видео! Давно думал, можно-ли так сделать. От ввода протянут один провод, второй лимитер было-бы очень трудно поставить, дого думал, можно-ли вот так разветвить? Спасибо!
рад что видео помогло, сам провел много времени за поиском информации.
Hello, thank you for your videos.😊 so,Can I have 2 inverters 1kva , and plug them to my grid plug?
Also, about the limiters, 2 inverters I have 2 limiters, is ok to add 2 limiters on my face wire so i dont exporting power back into the Grid? It will works? Thank you so much..
Thank you, very useful video. Excellent! If I have a Sun 2000GTIL with 8x300w south oriented, and a second 2000GTIL with 8x310w west oriented, does it make sense to connect them in parallel.?
paralleling arrays could decrease it's production.
Do you know if it has DC input overvoltage protection? For example I see the DC input range is 48-90 volt. What if you connect two strings of 3 parallel panels whose voltage is 100volts when not underl load and 70Volts under load. Do you think there will be a problem with the inverter when not under load?
will not start if the voltage is over the max, plus you have the rist to blow some capacitors inside with a too high voltage.
In this video, are the two parallel 2K inverters using the two CTs (in parallel with tuning resistor) used in the previous video with just the one, 2K inverter? Or, is this a different configuration for the CTs? (I understand you put the input cables from the CTs to each 2K inverter in parallel except for the anomaly with the one inverter).
here is the latest video for 2 inverters with 2 ct sensors:
th-cam.com/video/PcIfI7jypB4/w-d-xo.html
Thanks for this tutorial. Very nice. Like other asked if there is a way to configure Master / Slave unit. I wonder if both unit continuously monitoring load and decide to send equal amount since they are watch in real-time would send too much power in one leg.
Both of these units 240V, so using 2 legs always. There no option to set primary/secondary inverter. You could get two 120V inverters and set each on its own leg with its own CT sensor (if it's something you need).
@@SolarEngineering I purchased and installed 2 120v, one per leg and sensor wired up per leg. For the input I have 1.5kw solar panels. wonder if i should split 750w to each or is good idea to just connect to single input parallel on to both Sun Grid Tie invertor inputs. I see some people do this on TH-cam but on the manual it states not recommended because invertors may get confused on how much total power from input it can pull. your thoughts? Thanks agin!
@@RealHomerSimp2025 I didn't run inverters from solar panels, mine were always connected to battery. If you have 1.5kW panels already in place, I'd try to just connect 2 inverters to panels without splitting and see how it works, if production dropping - then splitting panels going to be required.
What sizes of wires did you use for the solar panels and the electrical panel?
from solar panels I have 2 sets of 10AWG
from inverters to electrical panel 12AWG
this video might help: th-cam.com/video/XpPdbo1LXEg/w-d-xo.html
how many amps does it support? in your opinion can it accept a curren of 20 ampere? (2 panel2 45volt, 10 ampere in parallel)
yes, 1 inverter can accept ~40Amps
Very good indeed ... Can we do it also for 2KW Solar Grid Tie Inverter and 2Kw Wind Generator Grid Tie Inverter. Thank you.
Yes, this combination will work as well.
Can you attach 48V battery bank (100AH each)
directly to the + and - terminals of the SUN-2000GTIL2-H ?? Please advise...Thank you. I connected 48V battery bank to the + and - correctly and blew the unit???
Any suggestion. My unit is the 2000W Grid Tie Inverter Power Limiter LCD Display DC50-90V Solar Input AC185-265V Output SUN-2000GTIL2-H
It may have been the surge. You need to connect using a precharge resistor before you connect directly.
I have a question sir can you help me pls if would like to extend the limiter sensor cable what would be the sizes wire and how long can a be the maximo
Use a network (Cat5 UTP) twister pair cable, use one of the pairs and you can go around 40ft end to end without causing measurement issues.
Have you tried running this with loads of 220v?
yes, works fine. grid voltage is 240V so loads also 240V.
Very interesting vlog. I’m in the Uk on single phase 230Volts (Line to Neutral).
Was wondering about using one CT clamp connected to two inverters. But not connecting linking the DC terminals together. What do you think? 🤔🤟
About to do the same thing myself, should work.
yeah will work.
The 2 KW inverter at the back it has 2 entries.One is for the sensor Internal USE .and the other for another sensor external use.What is the purpose of external use sensor.Where do we use it and how please????
I think in past it was another device (external limiter) and 2nd connector was made for it. Didn't see anyone using it.
nice video, so you just connected the 2 input connectors in parallel ? so basically 1 sensor with 2 plugs ?
2 sensors in parallel on one side, 2 connectors in parallel on another side.
here is updated video: th-cam.com/video/PcIfI7jypB4/w-d-xo.html
@@SolarEngineering just did it myself.. works nice :) wondering if i can somehow use 1 wifi for both as well ..
@@wilco300674 nice, congrats! I think wifi module can monitor only 1 inverter.
@@SolarEngineering i switched both and the sottware sees both but i also think we cannot monitor both at the same time with 1 module..
Where can a Beginner go to get a lot of answers to their questions ? Such as should I think about 12 volt or 48 volt batteries ? How many panels should I get ? What kind of Inverter ?
feel free to describe your requirements. I can help you.
Dear Friend. I have bought 3 items 2KW inverter with limiter. In A house that there is 3 phase Grid RST 380 VOLT. 230 volt per phase. Question No1.Can i connect each inverter seperatelly in each phase of the grid with each own sensor each one???? Question No 2. If i switch off from my electric panel the 2 phases and i leave ONLY one. Can i connect the three inverters in series so i can have in total 6 KW output to the GRID. ???? Thank you for your kind responce.PV
1. Yes you can do that, each inverter will be connected to each phase with it's own CT sensor on phase wire.
2. Yes, you can connect all 3 inverters to one phase. All 3 CT sensors will go to the same wire then.
I wonder shy one is putting out most of the power
please very much where can i get limiter 60 ma i am waiting for reply thank you very much
Dear Friend .I want to add a 4 x 12 batteries through an extra solar charge controller for 48 VOLTS batteries system..Could you please tell me what type of controller for 48 volts I can buy from the market ?? I will have for each 2KW inverter solar power [1 pair of panels v=68,4 I = 9,94]. and i will connect 3 pairs in parallel giving me Total 68,4 VOLTS and 29,82 Ampere. Thank you very much.I appreciate your very kind response...
There many different types of MPPT charge controllers, I'm using Outback 80A version.
Dear friend I forgot to ask you.Since i have an array of similar solars with out put Volt [max] =68,4 and I[max]=30 Amperes is it better to instal 5 pieces of 12 volt batteries and make a system for 60 VOLT instead of 45 volts for a 2 KW on grid inverter with limiter ??? and of course buy a solar charge controller of 60 volts 50 Amp. ???? Thank you
60V would be better for inverter
@@SolarEngineering 60volt could be better.But is hard to find a solar charge controller for 60volt battery and at least 40 Amperes.Do you know any??
@@pkefvkef4856 Outback specs saying that it's supporting 60V batteries.
Is it possible to parallel two inverters one 2kw and the other 1kw? Thanks
I don't know what kind of CT sensors 1kW model uses. If it's same as 2kW (100A/50mA), and 1kW inverter supplying 240VAC, then yes in theory should work. But I haven't try.
@@SolarEngineering yes, just received my 1kw today. It uses 100A/50mA CT sensor and can do either 120v or 240v. In theory, yes this should work. Should be the same as though you were using a battery. Example: 12v30aH + 12v18aH in parallel will just add capacity. So 240V8A + 240V4A in parallel should net you 240V12A.
@@SolarEngineering yes, they come with the same ct 100A/50mA
I’d say it would work
Hello sir
If I don’t used a control charger the inverters still be connecting the same way in parallel
I'm not sure what do you mean by control charger, but in any case parallel connection still will be the same.
@@SolarEngineering if the system is just solar panels to inverter no
Charge controller and no batteries
The connection still be in parallel input and output ?
@@kassab1981 if you use only solar panels then inverters will engage internal MPPT, so it's better to split solar panels between 2 inverters. So MPPTs on 2 inverters will not conflict with each other.
Output still could be paralleled.
Ну привет?'валодя'я имею к тебе пару вапросов по поводу этих ивнрторов'на какую мощность они рас итаны имею ввиду pv платэ ск шт у тебя на крыше и мощность
каждый инвертер рассчитан на 2кВт, панели можно сделать немного с запасом, т.к. они редко выходят на номинальную мощность.
Можно ли на него на один повесить панелей номиналом на 2.4 квт
Dear Friend. As you already know I have 3 x 2KW 220Volt AC on grid tie inverters.I want to connect all these three inverters to my electric panel which has 1 x 40 Ampere Fuse coming from Grid. QUESTION A .As far as the incoming PANEL VOLTAGE to the inverter. I understand that i connect the 3 red on top the +ve from panels in parallel.And also the 3 black on top the -ve from panels in Parallel too.As i know the limiter ring goes to the Live 1 that i only have as i said One phase.Do i have to place each limiter ring in the same live 1 cable??? I beleive yes. QUESTION 2.Now as as as the out put of the 3 inverters is concerned Do i connect them in parallel??? I mean each brown (live) cable together. each blue (-ve) cable together and each yellow (earth) cable together ???? QUESTION 3 .NOW what about the limiter CABLES ......How do i connect the three ones. ???? I must mention here that in a previous video of yours you confused me in a system that you were Using batteries.....48 volt you connected 2 inverters in parallel and you connected 3 sensors if i dont mistaken highlighting that one sensor ring you connected to the panel voltage.......Why? i am really confused. QUESTION 4.What happens if i install 48 volt battery system in the future. Each inverter has a pair of a solar panel array giving hapilly 68,4 volts.Since the top connections of each inverter will go to the battery output because the source of energy now we define to be the battery.........where do i connect the 3 double cables coming from the panel arrays offering each 68,4 volts.???? I imagine each to a solar controller ??? and where can i find a controller for 48 volts or 60 volts , in case i add one more battery.....I have search everywhere No charge controller for 60 volt system.....Thank you solar Engineering. VERY MUCH for your kind attention to my issues.....
Hi there.
1. yes, wires should be paralleled as you described. You could please 3 limiters on the same cable and connect limiters to each inverter.
2. you could parallel inverters, or connect each inverter to the panel using separate circuit breaker.
3. answered in #1
4. just watch my videos where I'm using these inverters with batteries, you could do the same setup. Charge controller that I was using supporting about 60V (don't remember exact voltage)
@@SolarEngineering You are expert and I feel obliged to your proper technically answers to my installation.Thank You.Wish you merry christmas n happy 2022.
Hello sir me again
Quick question the ac output of the inverters how you have connected and what is the output ac voltage per line
Hi, I live in US we have split phase system here. That means from grid 3 wires coming into main electrical panel (120V, 120V and neutral), between 2 legs - 240V.
These inverters producing 190V-250V (might be wrong with exact numbers). My inverters connected in parallel and then it's connected to 2 legs, so it's giving me 240V.
@@SolarEngineering so each inverter has outputs of 120 in parallel together give you 240
@@kassab1981 nope, each inverter outputs 240V, inverters outputs paralleled. Inverter output wires connected to Leg1 and Leg2 in electrical panel (no neutral connection) to get 240V.
@@SolarEngineering I see so in parallel the voltage does not increase so stays in 240v
What wire size did you used for the outlet
@@kassab1981 >>I see so in parallel the voltage does not increase so stays in 240v
yes, you are right
>>What wire size did you used for the outlet
Inverters pushing MAX 1900W each in my case. 1900W * 2 inverters / 240V = 15.9 A. 12 AWG wire should be enough for that. In my case I'm using an existing outlet that wired with 6AWG.
DEAR FRIEND .This on grid inverter with limiter has got only 2 terminals that you may connect the + and - of the solar energy.But in the same terminals you may connect the battery.Yes? It seems that it can not operate the system with solars and battery connected simply because if you use the solars to give to the grid then these have some protection voltage which id different from the protections of nbattery discharge.So this focus our thinking to have the possible connections of this inverter. A. connect straight awaw the panels to the inverter and have no battery.
B.Use solar energy to charge up battery and then connect straight away the battery to the inverter.Your solar will charge your battery and the battery always will give voltage to the MPPT of the inverter.Please answer me if you agree.Thank u very much.
yes, you could so A or B.
Inverter has MPPT built in if you are going to connect solar panels.
Or you can connect inverter to the batteries (like in my system) and then charge batteries from solar panels using another MPPT charge controller (Outback 80A in my case).
@@SolarEngineering I need clarification as I want to use both- solar during the day, and batteries at night with my 120VAC pair of Sun 1000Watt GTILs. I want to leave it as "plug and play" without needing to reconfigure the GTIL for each mode, solar n battery, or disconnecting the DC in from solar and switching it to DC in from battery. The only way I can understand that this could work would be to leave GTIL in battery mode (MPPT disabled when either battery mode is checked) with low voltage cut off and use a separate and independent MPPT Charge controller for the solar (large array) that is connected to the batteries and only the batteries and the batteries + / - output directly connected to the GTIL. Your thoughts, please. And Thank You again for so much useful information and Tutorials.
@@benkanobe7500 I wouldn't bother with switch to Solar/Battery.
Setup like mine worked perfectly.
Solar panels -> MPPT -> Battery -> 2 inverters -> Grid
check this video if you haven't seen it:
th-cam.com/video/XpPdbo1LXEg/w-d-xo.html
@@SolarEngineering Thank You! Your system is amazing! What I am proposing to you is what you called the basic system which you drew in the above TH-cam at the time "12:43". That is what I have been doing a poor job of explaining and my goal to build. Please look back at your basic system at "12:43" and imagine the GTIL is in Battery Mode with low voltage cut off correct for my very large 12VDC AGM batteries wired in Series (36VDC)/ Parallel.
If I leave GTIL in battery mode, then during the day I get batteries charged by MPPT controller and also supply GTIL with power from the batteries to handle the loads. When the sun goes to sleep, MPPT charge controller stops due to low voltage disconnect, but that is not a problem because GTIL doesn't care, it just continues to draw power from the batteries only. If batteries hit set value in GTIL for low voltage disconnect in the night, then cycle just restarts in the morning when MPPT starts back up and powers batteries up to reconnect voltage set in GTIL.
Assume for this explanation 5KW of panels, Southern California, perfect southern exposure, and ground-based 5KW of panels.
Will what I am proposing work? If not, why? Thank You. I need to go back and finish watching your TH-cam.
I’m thinking each inverter should be connected to its own breaker
Ideally yes, not sure if 1 breaker could cause issues..
Probably wouldn’t cause issues. I had both of mine connected to a sub panel and the subpanel wired to one breaker in main panel.
But if each is wired to its own breaker then one inverter can be turned off without both being off
@@RJ-cc1fz in terms of space.... Alek solution is doable....two inverters in the same breaker.... what should be the breaker capacity?
@@carlosguzman4461 each 2KW unit on MAX will pull about 8.3333A. So 2 @ MAX will pull about 16.666A.
you can reverse limiter sensor flow or direction instead of rewiring polarity... jizz, painful to watch
Not true the way he put them in parallel. You would be correct otherwise. The polarity is switched internal to one GTI so this was a workaround. He could have opened the unit and corrected it there without any need for the polarity reversal wiring.
somebody is stealing your videos and post them on amazon under these grid tie inverters and speeds them up so the voice cant be recognized .. they make money on affiliate links at your detriment
thanks for letting me know
Not 100% certain, however, before cutting the CT-clamp-wire and switching wires, same end result would be shown on your SUN Inverter, if you had removed the CT-clamp, turned it 180 degrees and then mounting it again over the same leg.