New 6KW Setup - Basic Questions

[inetdog]

What I wish to ask if is whether there are 2 connection between the circuit breaker panel and the GTI i.e. one being input of AC and another being output? Or just one connection that senses and passes current?

100% of GTI's have only one AC connection, the ouput. I suppose you could also say that it functions as an input while the GTI is just sitting there looking at the grid and deciding whether or not to produce power. But the power consumption for that is negligible.

That connection actually senses voltage and supplies current.

[jainsushant]

Thanks DreInMD and inetdog

This thread has been really helpful. Getting to learn so much.

Can you also please tell me how can I design my array? For a 5 KW or 6KW system, if I wish to use 250 Watts panel, then how should I plan? Is there an online tool somewhere that I can use?

Regards

Sushant

[russ]

Thanks DreInMD and inetdog

This thread has been really helpful. Getting to learn so much.

Can you also please tell me how can I design my array? For a 5 KW or 6KW system, if I wish to use 250 Watts panel, then how should I plan? Is there an online tool somewhere that I can use?

Regards

Sushant

Sushant - You need to have a local party design it to local requirements - this trying to get something is a national pastime I know but Dre should not answer you. You have shown you have no idea whatsoever - you could well kill someone.

Russ

[jainsushant]

Sushant - You need to have a local party design it to local requirements - this trying to get something is a national pastime I know but Dre should not answer you. You have shown you have no idea whatsoever - you could well kill someone.

Russ

Hi Russ

Understanding very well, you are the moderator, such a reply was really not expected. These forums and all are for knowledge sharing and if everybody knows everything, then there is no need for such groups. And you are using such immature tone of national pastime shows how much you really know about the world. It seems that you believe that you were born with all the knowledge in the world without acquiring anything from anyone.

What are you doing wasting your time between us humans?

[russ]

Hi Russ

Understanding very well, you are the moderator, such a reply was really not expected. These forums and all are for knowledge sharing and if everybody knows everything, then there is no need for such groups. And you are using such immature tone of national pastime shows how much you really know about the world. It seems that you believe that you were born with all the knowledge in the world without acquiring anything from anyone.

What are you doing wasting your time between us humans?

I spent many years working in your country - I know the games all too well.

The forum is not to teach someone how to do something dangerous or illegal.

Bye

[SunEagle]

Hi Russ

Understanding very well, you are the moderator, such a reply was really not expected. These forums and all are for knowledge sharing and if everybody knows everything, then there is no need for such groups. And you are using such immature tone of national pastime shows how much you really know about the world. It seems that you believe that you were born with all the knowledge in the world without acquiring anything from anyone.

What are you doing wasting your time between us humans?

While there are many people on this forum that have a lot of knowledge concerning solar pv systems none of them may know exactly what is required by law and code for where you live. If someone provided you with a design that is not correct the least would be that you have wasted money on a system that won't be allowed, the worst is that you or someone is hurt by that system. The best experts to talk to would be those that install pv systems where you live. They will know the laws and codes for that installation.

As I remember you first posted a question concerning the lack of power from your DG when the grid goes down requiring you to turn off your AC loads. We have already discussed that a solar pv system would not help you with that issue so I would suggest you determine what your priority is and then focus on spending your money on that issue.

Installing solar may save you money in the long run but a larger DG should solve your under power issue when the grid goes down.

[extreempv]

Hi Sushant

I just found your post about PV + diesel generator while grid power is out.

It is possible, but to do it properly I'd suggest

There are several 6kw 3 phase inverters available. For mixing with generators I'd recommend SMA as they have the option of using them in an off grid mode.

SMA 6kW Tripower 3 phase inverter

In addition to this, you need some method of controlling any excess PV power generated if/when you are running from generator. If you don't then you can, and probably will damage the generator.
If you add a SMA Sunny Island then this will control the power and prevent damage to the generator.
You would need 3 x Sunny Islands - 1 per phase and a suitably sized battery bank.

This would give you a flexible and future proof system. If you wished you could expand the PV up to about 30kw ( 2 x the rating of the Sunny Islands)

Ken

Mod note - Ken - do not put your links in a post - a manufacturers links are usually acceptable.

[sushant]

Hi Russ / inetdog / SunEagle

I will start my post by apologizing to all of you to barge back into the forum even though I was kicked out of it 2 years back. Now logging in with a different ID. I took my time to find my answers, install the system all by myself and get the system running as per my requirement.

The reason for coming back and posting is very clear. I wish to answer the allegations that were put on me and my respected country after you disabled my comments. Well, I hope you realize what you had written about my countrymen is categorized as racist remarks and you can be, or rather should be, put behind bars for that.

My idea of joining your forum was to gain some knowledge so that I could get my basics clear and do my solar installation myself. I have this dream of making this technology customer friendly than being vendor friendly. And the replies and comments I got from you all really shock me. Thank God, the whole world is not like this and I found my answers elseware. And now, I have a running 5.5KW Grid Tie System on my rooftop. It has 22 Panels of 250Wp each and they are connected to Delta 5KW Inverter. When there is grid, then no problems of course. And when there is no grid and DG is ON, there is no problem still. As per my sweet desires and requirements, the system works perfectly on DG thereby saving me the trouble for the change of DG and saving me diesel also. Yes, I succeeded in what I wanted to do inspite of your demotivations.

I also thank the God that he did not give inventors and innovators mind like yours otherwise there would have been no inventions ever. I don't say what I did is new invention, but yes new for me. And what was possible and you all tried convincing me that it was impossible.

What you all said about my whole country being a gang of crooks, who promote the agreeable fools and not the deserving ones or them making you sit on podiums just to show foreign participation can be specific cases. And it is really not right to make demeaning statements about a country like that based on such specifics. On the contrary, all the innocent investors, INDIAN Investors were fooled by seeing your face. That also puts the burden on your shoulders of fooling so many of us by sitting on such podiums. Had I been on your place, I would have simply refused to attend such an event rather than dying of guilt of cheating many at one go. That you did without refusing.

Well, I really do not wish to waste any more of my time. But, what I wanted to tell was that it is really not illegal to make a GTI inverter run on DG as long as we ensure it is not going back to the grid while it is out. And if you have any questions about how I did it, please do ask me. I will be more than happy to share what I know unlike you. And if you are coming to India again, please come and see my setup and then tell me that I am wrong. Not otherwise.

Regards (because your knowledge still deserves regards, not your attitudes)

Sushant Jain

Hi Ken

Thanks for the advise. My system is up and running.

[SunEagle]

Hi Russ / inetdog / SunEagle

I will start my post by apologizing to all of you to barge back into the forum even though I was kicked out of it 2 years back. Now logging in with a different ID. I took my time to find my answers, install the system all by myself and get the system running as per my requirement.

The reason for coming back and posting is very clear. I wish to answer the allegations that were put on me and my respected country after you disabled my comments. Well, I hope you realize what you had written about my countrymen is categorized as racist remarks and you can be, or rather should be, put behind bars for that.

My idea of joining your forum was to gain some knowledge so that I could get my basics clear and do my solar installation myself. I have this dream of making this technology customer friendly than being vendor friendly. And the replies and comments I got from you all really shock me. Thank God, the whole world is not like this and I found my answers elseware. And now, I have a running 5.5KW Grid Tie System on my rooftop. It has 22 Panels of 250Wp each and they are connected to Delta 5KW Inverter. When there is grid, then no problems of course. And when there is no grid and DG is ON, there is no problem still. As per my sweet desires and requirements, the system works perfectly on DG thereby saving me the trouble for the change of DG and saving me diesel also. Yes, I succeeded in what I wanted to do inspite of your demotivations.

I also thank the God that he did not give inventors and innovators mind like yours otherwise there would have been no inventions ever. I don't say what I did is new invention, but yes new for me. And what was possible and you all tried convincing me that it was impossible.

What you all said about my whole country being a gang of crooks, who promote the agreeable fools and not the deserving ones or them making you sit on podiums just to show foreign participation can be specific cases. And it is really not right to make demeaning statements about a country like that based on such specifics. On the contrary, all the innocent investors, INDIAN Investors were fooled by seeing your face. That also puts the burden on your shoulders of fooling so many of us by sitting on such podiums. Had I been on your place, I would have simply refused to attend such an event rather than dying of guilt of cheating many at one go. That you did without refusing.

Well, I really do not wish to waste any more of my time. But, what I wanted to tell was that it is really not illegal to make a GTI inverter run on DG as long as we ensure it is not going back to the grid while it is out. And if you have any questions about how I did it, please do ask me. I will be more than happy to share what I know unlike you. And if you are coming to India again, please come and see my setup and then tell me that I am wrong. Not otherwise.

Regards (because your knowledge still deserves regards, not your attitudes)

Sushant Jain

Hi Ken

Thanks for the advise. My system is up and running.

There is always a possibility to find equipment that will fool a grid tie pv inverter into believing the grid is up and running and keep working but in most countries that regulate a grid tie pv system that hardware may not be legal.

In the US you can build a hybrid pv system that includes batteries. The solar inverter has the ability to continue to work if the grid goes down and still charge the battery system. The hybrid system will also isolate itself from the grid to make sure it does not feed back and pose a dangerous problem to anyone working on the "dead" grid hardware.

What is not common is to find a generator (diesel, gas, propane, etc.) that can emulate the grid to the point of allowing a grid tie inverter to be fooled into working as normal. I am not saying you did not find that type of hardware but for 99% of us it is not something that is easily found or in some cases even legal.

So if your system works without a grid using your DG then my congratulations. As long as it is safe and legal I have no issue with it.

If it is not safe or legal in parts of the world I would ask you not to generalize and say everyone can do what you did because most legal solar hardware will not work that way.

I appreciate you coming back to the forum. I also encourage you to stay and maybe learn more about solar technology that continues to evolve.