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#Post#: 1184--------------------------------------------------
Re: 300 watt Grid Tie Inverter
By: lynx wind Date: January 2, 2014, 7:03 pm
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It is really tricky going straight from wind turbine to GTI.
The GTI is really designed to track solar power. Solar is far
more steady. An occasional cloud will come by and the GTI will
adjust up or down as needed. Wind is far more sporadic, even
when you might think it is steady. The GTI will pull too many
amps and the turbine almost stops. A larger turbine will work
Ok, but if it races up over 30 volts before the GTI adjusts,
then it fries the GTI.
One trick is to run the turbine as a supplement to the solar,
but that only works during sunlight hours.
I think it is best to charge batteries with small wind power, or
charge batteries to run the LJL-SC.
The GTI limiter worked pretty good to meter power to the GTI in
predetermined steps. It would take a lot more refinement, but
it works to limit the power to the GTI.
#Post#: 1185--------------------------------------------------
Re: 300 watt Grid Tie Inverter
By: mindhormone Date: January 2, 2014, 10:03 pm
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thank you, so basically i can hook wind/hydro turbine
considering if it is "stable in rpm"
probably hydro turbine because there is a constant flowing river
here. :)
I was thinking hugh piggot's blog
HTML http://scoraigwind.co.uk/2011/09/powerspout-hydro-turbines/
HTML http://www.youtube.com/watch?v=cQXwvQfIL-M#t=103
And yes i can do your design LJL-SC for portable/moblie energy
system.
#Post#: 1188--------------------------------------------------
Re: 300 watt Grid Tie Inverter
By: lynx wind Date: January 3, 2014, 8:30 am
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Sorry, I didn't really answer your question very well.
Yes, if you can run a system at a fairly steady speed and power
a GTI will work very well and the 300 watt Power Jack is about
90% efficient. I have run a couple for years without any
problems.
Hydro would be perfect for a GTI.
Cutin for the 300 watt Power Jack is about 14 volts. As the
voltage increases the GTI ups the amperage in steps. Until
finally at 30 volts it is pulling 10 amps. Mine run typically
in the 180-250 watt range. It will start at 14 volts and .25
amps.
#Post#: 1533--------------------------------------------------
Re: 300 watt Grid Tie Inverter
By: mindhormone Date: February 15, 2014, 11:25 am
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Thank you Marcus
#Post#: 1538--------------------------------------------------
Re: 300 watt Grid Tie Inverter
By: nessprojects Date: February 15, 2014, 3:14 pm
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Just a mention that you can get dedicated turbine GTI`s from
China. The one I got was a 300w that started charge at 10.5v and
worked really well for about 6 months then it dropped to only
outputting about 30w (Circuit fault which I have not yet tracked
down). They also have a dump load controller built in but you do
need your own 2-3 ohm dump load.
#Post#: 3427--------------------------------------------------
Re: 300 watt Grid Tie Inverter
By: nessprojects Date: June 20, 2014, 4:55 pm
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@ Lynx
You say in a previous topic that you use a GTI as a dump
load.....Can I ask a few questions.
1. Do you couple the 14-28v GTI direct to the battery that is
being charged by turbine ?.
2. Have you ever had any issues with the GTI being constantly on
24/7 ?. (Mine seems to cut-in at around 14v and drops out at
about 12.8v).
Only reason I am asking is because I was a little concerned
about it being on all the time, this is why I removed it a while
back. (Normally on solar they get to have a break at night).
I was wondering if a control panel of some sort would be good to
disconnect the GTI at a low voltage and back on again at a
higher voltage ?.
#Post#: 3430--------------------------------------------------
Re: 300 watt Grid Tie Inverter
By: lynx wind Date: June 20, 2014, 6:33 pm
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Mine has been on for five years (I should make sure the cooling
fan is clean)
A 12 volt battery can easily reach 14 - 15 volts with charging.
I had one up to 14.59 volts at 2 amps the other day. So if that
level is reached the GTI will start pulling a few watts. If the
charge level keeps rising, the GTI will try taking more power.
I think this is quite safe for home, battery, and system.
#Post#: 3431--------------------------------------------------
Re: 300 watt Grid Tie Inverter
By: nessprojects Date: June 20, 2014, 6:54 pm
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Thanks for the reply....Think I might give mine another chance.
#Post#: 3575--------------------------------------------------
Re: 300 watt Grid Tie Inverter
By: nessprojects Date: June 30, 2014, 7:09 pm
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Got my GTI connected directly to battery now for the last week
and noticed that my dump load hardly ever kicks in.
It starts exporting at about 14v and stops exporting power at
about 12.8v.....Max exported power I have seen is about 80w
which is better than just dumping it. I Like !!!.
#Post#: 3579--------------------------------------------------
Re: 300 watt Grid Tie Inverter
By: lynx wind Date: June 30, 2014, 8:41 pm
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This together with the boost is a pretty darn good system. No
need for controllers, complicated and fragile circuits. So far
to me it seems foolproof. Keeps the battery fully charged with
no fear of overcharge and dumps excess back to grid.
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