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Old 11-22-2017, 09:44 PM  
swimmer_spe
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Default Solar installation

My future house, I want to be off the grid, sort of.

It will be a house on a lake, and I know there is more of a risk of power outage in that location.

So, what I am thinking is a system that has solar panels and wind turbines. This is fed to a battery bank. The house is still connected to the grid, but when the power goes out, the batteries keep me in power. When the batteries are fully charged, the excess power can be sent to the grid.

Does that setup exist?


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Old 01-05-2018, 04:31 PM  
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solar panels
wind turbines
Does that setup exist?
http://www.nrcan.gc.ca/18366
Depending on solar insolation at your location, it may take at least 10 sq. meters of panels to give you 1 kw.

IIRC, a 9' diameter wind propeller 100' off the ground can supply an "average house" with 1 kw.

Cold batteries may give you half of the charge back from what you put into them (50% efficient).

Getting facts rather than opinions about these setups may be prove difficult.



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Old 01-05-2018, 04:33 PM  
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IIRC, a 9' diameter wind propeller 100' off the ground can supply an "average house" (which takes 1 kw).
Ideally, I would do that too.
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Old 01-05-2018, 04:45 PM  
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There was a guy who wanted to use a water turbine, but it was so far from his house he lost half the power in the wires, so he needed step-up and step-down transformers.

His 120v would vary by way more than 10%, so he would then need a voltage regulator.

And troubleshooting this setup will probably keep you up at night. I hate troubleshooting under pressure, like when our old furnace stops on a winter night.

Look b4 you leap.
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Old 01-05-2018, 04:50 PM  
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The cool thing about wind turbines is it works when it’s dark outside...and you have to have wind. I really wish I had the know how and resources and time to do what you are doing, maybe when I retire in like 15 years. There’s a lot on YouTube of diy projects but smaller scales.
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Old 01-05-2018, 05:00 PM  
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Yeah, build a 1/10 scale setup and see how you like it. Power a light bulb for a year and keep records.

I tried to make a boat speedometer out of a small propeller, a dc motor and a milliammeter. Got nothing, never found out why.
Should have tested it under the bathtub faucet first. Let's see, 6 GPM from a 1" nozzle gives me how many MPH?

You could set up a 3' turbine on a pickup truck bed with a frame of 2x3s and see how it does vs. your MPH. Wave to the cops as you go by!
You should have fan shroud in case a blade flies off. . .

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Old 01-05-2018, 08:55 PM  
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They have systems that dump the "extra" power back onto the grid rahter than storing it on site? Power going back on the grid is credited to your account reducing your monthly bill. (Net Metering)

https://us.sunpower.com/blog/2015/08...etering-works/

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Old 01-05-2018, 08:59 PM  
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They have systems that dump the "extra" power back onto the grid rahter than storing it on site? Power going back on the grid is credited to your account reducing your monthly bill. (Net Metering)

https://us.sunpower.com/blog/2015/08...etering-works/
I would want some storage so that would allow me to last 72 hours with no gird power.
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Old 01-05-2018, 10:24 PM  
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Yeah I agree with you! If you’re going to do it, go all in and be self sufficient so you can give the middle finger to the utility company! �� Which I happen to work at lol.
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Old 01-06-2018, 02:21 AM  
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Yeah I agree with you! If you’re going to do it, go all in and be self sufficient so you can give the middle finger to the utility company! �� Which I happen to work at lol.
I am doing it because I will likely be living in a more remote area that if it looses power, it may be off for more than a few hours.


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