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Posted by Ron Rosenfeld on April 10, 2010, 12:09 pm
 




A number of US based systems also require a second meter.  In your case,
I'd say that's pretty useful if you really want to encourage PV. Otherwise,
you'd just be running the meter backwards and only get the $.082/kWh
credit for any excess you generated.  No payback there.



I don't know how mine would behave if a single phase was open.  It is
spec'd to run, unloaded, at up to 150 mph (240 kph).  But it would sure be
scary if the balance wasn't correct.

Mine generates wild AC at voltages in that range.  That is brought to the
house where it connects to a 4:1 step-down transformer; and then goes to
the controller which does the rectification through some SCR's.  The
circuitry in the controller prevents the DC voltage from going above
certain setpoints -- 56.2V for normal charging; 64 for equalization.


Mine start to furl at about 33 mph (53 kph).  Maximum output is at a bit
lower speed than that.


I can order a replacement from the factory.  Did you build your own wind
turbine?  

The circuitry seems simple enough to do, especially if you can fabricate
the printed circuit board.  And I have replaced it once or twice as some
circuitry was upgraded.

--ron

Posted by Josepi on April 10, 2010, 1:23 pm
 


I have one of these cheap 10' Chineese units. No parts seem to be available.
I talked to a few local guys selling them but they both freaked out about
selling just a controller but both claimed it was their design and wouldn't
match anything I bought elsewhere...LOL I could identify the chip numbers
and give them the schematic I made for their "custom" designs.

I have a few industrial quality o/v relays I will build a decent controller
around. I will stage the loading at two different voltages and possibly use
crowbar o/v for the if-all-else-fails last resort, third level. I am hoping
to either feed this through my PV unit or directly to the batteries after I
find out how my co-gen units responds to somebody else's feed in to the
batteries. The input's to PV units seems to always be capped at about 125vdc
(component maximums) and a run away wind turbine would ruin the works. That
would be alt energy / wallet  disaster then.


I can order a replacement from the factory.  Did you build your own wind
turbine?

The circuitry seems simple enough to do, especially if you can fabricate
the printed circuit board.  And I have replaced it once or twice as some
circuitry was upgraded.

--ron



Posted by Ron Rosenfeld on April 10, 2010, 7:32 pm
 



That's probably a good thing!  You'd want to buy stuff with better quality
:-)


My wind turbine and PV controllers are hooked to the batteries separately.
--ron

Posted by Josepi on April 10, 2010, 8:50 pm
 

My turbine was hooked to the batteries separately but when the controller
was found inadaquit (sp?) to handle the high wind energy production it
boiled my batteries and cooked them before I could realize what was
happening. The 125 Ah rating was too small to handle that kind of heavy
charge and I couldn't seem to stop the beast with a phase wire burned off
inside the turbine. The wind comes and goes with my lake effect climate. You
can be outside without a breeze and half an hour from now you are
reinforcing the gazebo with criss cross 2x4 lumber...LOL

Some big lessons learned, some sweat, and some environmental familiarity.




My wind turbine and PV controllers are hooked to the batteries separately.
--ron



Posted by Energy Guy on April 11, 2010, 12:25 am
 

Josepi wrote:


What's to stop me from running a line from my house to my neighbor's, so
that he can feed it back into the grid?

I get billed at, what, 10 cents/kwh here in Ontario?  And he gets a
credit of 80 cents for making his meter run backwards?

So when he gets his payment, we split it (I get 50 cents/kwh, and he
gets 30 cents).

Tell me why that wouldn't work.

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