Again, many thanks 'oztules'. If you were closer I would buy you a Pint of our local Brew.
Here being advertised by our Cat, Kiwi, (sorry name was a coincidence).
The Family Hubert's just live 8 miles away, good friends........http://www.lesvergersdelamoriniere.com/
Thanks, Black eye to neg... it is, nice to hear that 'PJ' are listening to you.
If I can lift those temp sensors and re-use, I will. However I will be fitting a temp sensor and switch to switch the other 2 spare fans on, maybe.
No, I will not be using the PJ battery charging facility, but I like your fuse concept for Synchronisation of the HZ with other sources.
Thanks about the centre bolt, it becomes an extra turn if something touches the top......got it.
And yes I have a suitable plastic tube to shield the bolt.AC Coupling
Using used/second hand GTI's, (very very cheap), all SMA as I have Grid guard codes to alter their parameters. These GTI's are taking PV and are connected into the 220vac Mini Grid that the New Inverter is creating, and which the House's, Buildings are using.
Now what I understand from your last comments..... That the new inverter can take backfeed from the GTI's and this can go backwards through the transformer.?
I have done your test with 220vac on the secondary and producing 28vac at the Primary so I see that.
......But this will be AC at 28v. ?
......So its unlikely that the batteries can be charged.?
Battery charging using this Inverter is not required by me as I have plenty of Battery charging sources, 3off 3.7m (12 footers) wind turbines and 5kW Pv on trackers, these are controlled by 3 Tristar Dump/controllers a Tristar MPPT controller and a Midnite Classic 200. The Midnite Classic has 2 aux relay outputs and these can be set to switch on and off depending on the battery voltage. (I love the Classic as its just so good with its charging regime).
I also have a real sweet used/second hand ELTEK 220vac IN, 100a 48vdc, battery charger installed, that can be used if all else fails, ie no SUN and NO WIND.
In certain conditions this also could be connected to my mini grid and use excess power from the GTI's. I find that I get a good 10% of PV rated power from my Mono Panels on even gloomy days, ambient light.
Modern GTI's are reasonably efficient so with say 15kW of PV I would still be getting about 1.5kw on those murky days.
Okay raising the HZ frequency to back off/shut down the GTI's is a NO NO, why? because I have a SMA Sunny Island 6kw, actually only rated at 4.2kw continues use.
And the Frequency Control is very flaky and with me goes up to 60Hz, with not so good consequences. Yes I could get around this, but by totally installing very expensive SMA ancillary equipment, which I will not as this defeats the Self Build/empowerment concept within me.
Now what I recall you said, "If the GTI's power is not being used, the 220vac voltage from the Inverter increases" or something like that.
Do you recall how much the voltage increase is before things start to get 'hairy' and what increase do you think is SAFE, (without damage) that this Inverter PJ boards can take?
As I can set the GTI's to shut down at say 245vac or whatever.
Now my 5off GTI's are/can be up to 500 feet away from each other and my main Power station Building, so I promised the Mrs that "I shalt not dig any more Trenches", Sigh, so no way of getting signal cables to the GTI's.
So I will also need some sort of simple PowerLine control to shut down the GTI's when power is not required, but I will separately post on this forum about that.
Yet again, a big thanks to 'oztules'.
I am awaiting some more 50mm/2 flex cable for final hook up, so a few days before I switch the baby on.