Transferring RE Power

[Deleted]

Hiya Gary and Guy's,
Well with my shed RE array dumping a heap of PV power into heating elements I want to transfer the dumpload to my house array. OK for some spec's both the shed and house arrays are 24 volts but the distance between the 2 is over 100 metres so the cable required would exceed 400 amp welding cable and the cost would outstrip our budget. By using high voltage wild AC I can use much thinner and cheaper wire.

Now I know there will be loss's involved but I'm looking at making 2 matching transformers where I can input 24 volts DC in have wild AC out and to the other transformer then back to 24 volts. Now I'll have close to 1Kw of PV and 2 wind generators on the shed so yes I'm talking at serious power I'm currently wasting as my 2 shed arrays are 550AH and 700AH and I mainly only use the shed on weekends. Even if the whole system was only 45% efficient I'd still be putting worthwhile power into my house array which otherwise I'm just dumping the excess.

I'm on looking at the best way to tackle this so all suggestionswill be appreciated.

Cheers Bryan from Australia

[Gary Lecomte]

Well 24 volts at 400 amps would be 9600 Watts.
That would require a MASSIVE INVERTER Circuit.

NOT VERY PRACTICAL at all.

It would be much more practical and cost effective to put a different generator on your wind mill.
Possibly one that put out 110 or 220 Volts AC.
Than use a Transformer and rectifier circuit to Reduce it to the 24 volts at the other end.

[Deleted]

Hiya Gary,
Above I posted my future power spec's I'll be putting in and I'm the first to know you need to learn to crawl before you can walk. A friend in irc gave me this link web.telia.com/~u85920178/power/invert1_00.htm

to think about. He mentioned he did make the circuit and got it working upto around 400 watts with no problems. This weekend I'm going to have a go myself as I've got 2 matching 12 volt 5 amp transformers. It wont matter if I let the magic smoke out as I've got quite a few transformers and I am aware of the dangers of working with AC.

That circuit does use a square wave AC but as I'll just be using it to transmit from transformer to transformer the waveform shouldn't matter.

Sorry about the first post where I mentioned big, instead of I should of started with this post.

Cheers Bryan

[Gary Lecomte]

bryan1 said:

Hiya Gary,
Above I posted my future power spec's I'll be putting in and I'm the first to know you need to learn to crawl before you can walk. A friend in irc gave me this link web.telia.com/~u85920178/power/invert1_00.htm

to think about. He mentioned he did make the circuit and got it working upto around 400 watts with no problems. This weekend I'm going to have a go myself as I've got 2 matching 12 volt 5 amp transformers. It wont matter if I let the magic smoke out as I've got quite a few transformers and I am aware of the dangers of working with AC.

That circuit does use a square wave AC but as I'll just be using it to transmit from transformer to transformer the waveform shouldn't matter.

Sorry about the first post where I mentioned big, instead of I should of started with this post.

Cheers Bryan

Hi Bryan, That circuit will work, but it is Not very stable in Frequency.
And remember, it is Square wave power.

Your two 12 volt, 5 amp transformers will deliver120 watts at best.

This is also squrewave, but a Much Better Inverter circuit.
It can produce a 500 watt inverter with a GOOD Transformer, possibly even a 1000 watt one:

www3.telus.net/chemelec/Projects/Inverter/Mosfet-Inverter.htm

I don't know where that guy got his Mosfet prices from, but there are Many High Current Mosfets available for just a Few Dollars.
(Example: RFP50N06 = 50 Volts at 60 Amps, Cost is only about $2.00 each.)