Sun G Wind Grid Tie FAILURES

Mur Good info and response,
To try to answer your question, i do beleive there is another relay that would activate the island protection. i would assume that is the clicking you here when they are turning off/on.
How are we to be assured it will always work. Simply put we are not. These are the chances we take with NON UL approval inverters as well as why they are cheap to pruchase. These are also the reasons as a business i could never install one for a customer. Unless we ourselves install the saftey features as Tom is speaking of or the shut down conatctor system i have in place we will always be taking a chance with these inverters. Knowing thes facts it does leave a newbie in the cold. We all know that as of now to get the manufacture to revise the design will be out of the question. I have no answers on what to do but only to say you take the chance and follow other information as it come in. We are trying to use them in a way to not create any dammage to them and it looks like so far we have been sucess full after many tries. I do not know of any other people using these invertes this extensivly as well as sharing this much infomation on them so i guess we are on our own.

 

Good post Blue that is what i am saying, one inverter may not be enough and you may have to give up some high wind watts to keep it all under control so s#@t does not burn up. I am glad to hear we are all using them in diferent ways to see the results. So far battery clamping, and 2 inverters or more are keeping things out of the frying pan. Go team Sun G

 

Thanks guys.
Just checked the the grid tie for island protection with the wires disconnected. The input terminals go to infinite resistance. So the GTI basically disconnects itself from the turbine during power outages. So now I really wondering how yours could have stopped working after a power outage.
So for now I will run the high and low 500 watt GTIs together and run the switch with a heavy duty relay hooked to the input DC line. So if the power gos out or the GTIs disconnect from over volt it will tie the turbine to the dump load.

 

I just sent an email to the manufacturer.
I asked at what voltage the Sun G wind 10.8-30 volt GTI would fail if in island protection. Let you know when I receive a reply.

 

35 volts tom,the cap will explode inside it and leave wading every where....I have the cap specs if you want to buy some,they are 3-4 dollars apiece..

 

4700uf 35v capacitor,negative is the side with the slashes and the board on the sun g is marked...heres a pic from the web of them

 

Blue are you saying the caps fail at 35v when the GTI is running and getting power from the turbine ( that i know, thanks) or are you saying they fail at 35v when it is the island protection mode? Tom's last statemen seem's to be talking about island protection failure. It is my uderstanding that they disconnect from the turbine totallyy in a higher voltage situation, i have ran 80v through them in dump mode with no dump coil and no blown anything. Sorry a little confused on you statement.
One another note those caps can also be bought from Radio Shack. I tried replacing them in a Power Jack solar inverter a few years ago and the problem was things were toasted before the cap as well.

 

I dont know about the one with the on board dump but the normal 10-30 will fry even if not feeding but connected to voltages over 35volts. the ends burst out of the cap.

 

I would never trust those on board dumps with any type of real turbine.It would get to hot in there from some good 30 mph winds during a power outage.

 

Very good point Blue.