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Archive for March, 2009

I want to power my new home I am building on solar power alone what will the cost be roughly?

I also want to stay off the electric grid . It would cost an additional ten thousand dollars to be hooked into it and I want to be independant from utilities. Would solar panels and batteries power lights and T.V , computer , washer dryer ect.

TV, lights and small appliances, yes. Washer, maybe. Dryer, not likely unless it's gas – consider a clothesline. Electric range or oven, no. Hot tub, no unless it's converted to a gas heater.

The raw panels are about $3-8 per watt. So for 6Kw figure about $18k for the panels. The charger/inverter and batteries, figure $2-3k more. Figure about $30k including the installation.

You might also consider a generator. The off-grid houses I've seen tend to have them, even if they have batteries too. Add $3k for that.

Do you have a creek? Consider small-scale hydro too.

What do you think is more efficient in harnessing wind power, a conventional wind turbine or a windbelt?

Whats more efficient in terms of power generation and maintenance, a wind turbine or a windbelt?

windturbine

solar/wind power question?

does anyone know (on average) how much energy solar power creates per one hour of sunlight (like one hour of sunlight creates an X amount of kilowatts)…and also the same thing for wind power (like how much wind is needed to create 1kilowatt of energy…?

It is not that easy to answer your question because it is a function of size and type of wind turbine or solar panel. An average Home Solar Panel is about 3 ft. X 4 ft. and will produce maybe 30-40 Watts when the sun is around peak position. Remember, this peak is only a few hours a day. Lets say each panel would produce 50 Watts for 5 hours a day and less for another 5 hours, and the average is 30 watts/hr over the 10 hours it can produce any power. I would need 1000/30, or about 34 panels to average 1 KW that period. Of course, I still have 14 hours with no power.

Wind Turbines can be just about any size up to 1.5-2.5 Million Watts for most of the large ones used by electric companies. I've heard of a few larger, but not many. Most good wind turbines only require 6-10 MPH of wind to produce at peak power. They just need to spin at a certain speed, and the blades rotate to catch more or less wind as the wind speed changes. This is primarily to protect the equipment from overspeeding and damaging the reduction gear and motor. Her again, they produce nothing when the wind dies down.

Both Solar and Wind require a lot of area to produce much power. The wind turbines a large with over 40ft. blades and are on an enormous stand that is about 100 ft high. The turbines must be spaced pretty far apart.