I am pretty familiar with the Classic 150's controls and setup. But I never dabbled into the Dump load...
What I am trying to figure out is how can I dump load into a Grid Tie inverter from the battery side. And use the
150 to control the whole thing.
What type of GTI is it?
Psyfy
I am really confused as to what you are trying to do? You have a Classic charging batteries? But what about the grid tie inverter is it a battery based inverter or pure grid tie?
Ryan
Okay guys Dont kill me here, I have a 600 Sun GTI's What I was wanting to do was take one and use as Dump load or like a no waste deal. I can hook these directly up to my battery bank and I havent had any problems. But I would like to find a way around to switch them on at a certain point like a dump loading..If that makes since.
Ok perfect sense (Sort of)
First question is I assume you have an Off Grid only Battery based inverter?
Second is there any sort of signal for the Sun GTI that would stop it from selling or allow it to sell? The Classic could send a signal at high battery to trigger the Sun but not sure if the Sun allows this? If the Sun has no signal inputs than you have a couple options.
First and easiest but maybe not the best is a SSR (Solid state relay) in the AC to the Sun inverter to give it grid power on high battery voltage. The down side to this is the 5 minute wait for the gti to connect to the grid
Second way would be a DC SSR capable of the ampacity in the dc line to the sun inverter. This will be more elegant but more pricey as well.
Ryan
Yeah there is no signal Input on the SUN GTI's... Its either kick on or kick off. So relay will have to do. And I do have a relay. So I use the relay as a switch on one of the AUX outs I take it.
Relay should handle around 100 amps easy. It was a special relay from a kick starter box Very thick contacts.
Any suggestions on how to perform the wiring on such device or schematic. Thanks guys. And what setting to use on the Midnite Classic for it.
Quote from: SolarVet on February 09, 2013, 12:32:26 AM
Yeah there is no signal Input on the SUN GTI's... Its either kick on or kick off. So relay will have to do. And I do have a relay. So I use the relay as a switch on one of the AUX outs I take it.
Relay should handle around 100 amps easy. It was a special relay from a kick starter box Very thick contacts.
Any suggestions on how to perform the wiring on such device or schematic. Thanks guys. And what setting to use on the Midnite Classic for it.
It's a big subject but if you know what you are doing, here are two vital bits of info.
1.) Many of GTI's that we have seen have an 'Inhibit pin' on the controller board (I'm just an A/H hacker with this stuff by the way, a welcome relief from industrial automation design during the day). So, pulling this line high (CMOS but TTL does the trick) inhibits the H-Bridge (usually an unlabeled header pin and this importantly affects point 2 below).
2.) Use of the inhibit function in 1.) also bypasses the 5 minute delay imposed by the 'Grid Resync' compliance feature in firmware. Otherwise, workshop hacks would spend forever waiting for the things to come back up. Technicians here can imagine the frustration. A bit like old-punch card programming I imagine. :)
However, the fact is that with the entry of Chinese manufacturers into the western markets, no-one in the west repairs this stuff anymore as it just isn't economical at our hourly rates.
Psyfy