# solar panel

1 Posts
Sep 10, 2009 10:10 am
solar panel

i need to make 50 kwh per day what do i need?

99 Posts
Sep 10, 2009 12:19 pm
Re: solar panel

A better conservation plan.

46 Posts
Sep 10, 2009 05:32 pm
Re: solar panel

Haaaa ha ha!

578 Posts
Sep 10, 2009 06:32 pm
Re: solar panel

danny,

to harvest that amount of energy, you are looking at an array very roughly between 12kw and 20kw, depending on the variables.

you can play around with various numbers here:

http://www.altestore.com/store/calculators/on_grid_calculator/

hope that helps,

james
altE store

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99 Posts
Sep 11, 2009 02:25 am
Re: solar panel

Seriously though, can you specify why you would need to generate that much electricity?  The average American home uses around 30 kWh/day.  My 3200 sqft off-grid home uses about 6-8 kWh/day and generates that with 1.7 kW of wind/solar hybrid.  Conservation is MUCH cheaper than generation.  What loads can you reduce first?  What are your biggest loads?

Sep 11, 2009 07:07 am
Re: solar panel

50 kWh's per day from a photovoltaic array.
If the prospective site for this array will see the equivalent of 4 hours of full rated power per day, as averaged out over the four seasons of one year and, this PV array is a flat plate collector angled at latitude all year... Then it will take a PV array of, at least 12,500 watts or 12.5 kW respectively.
Even if you could obtain this at \$3.00 per watt that would amount to \$37,500.00 not installed.
If you were to purchase this from the utilities at the going rate of \$0.12 per kWh, that would amount to \$6.00 a day or \$2,190.00 per year. So, \$37,500.00 divided by \$2,190.00 would equate to a payback period of 171 years. Remember, that was not installed and your kWh's may vary. To the best of my knowledge PV modules are only warrantied for 25 years.

Potentially, a PV array of this size would be best located in a region of a continent that sees a high average amount of sunlight year round, as well as an area that sees unobstructed sunlight from the earliest sunrise to latest sunset as well as being installed as a pole mounted solar tracker "orchard." Not to mention that, the power made would have to negate the expenditure. In otherwords, be profitable. But thats just my opinion. For all I know, you could be planning to power a small community with all this power. There are so many variables and, you weren't very specific.
http://www.energy.gov/

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