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Photovoltaic Cell Cost

Shannon Said:

If a commercial solar cell with a maximum output of 2 amps at 0.5 V costs $30...?

We Answered:

Watts = amps x volts. So how many watts is the cell in your example?

Can you now figure out how many cells would be needed for a kilowatt (1000 watts)?

By the way, this problem seems old - the costs are off by a factor of 10.

Georgia Said:

Help on photoelectrochemical hydrogen production at home?

We Answered:

The National Renewable Energy Lab has a number of alternative to the traditional hydrogen production with electrods. Given your constraint of focusing on water to hydrogen conversion (2H2O --> 2H2 + O2) and use of direct solar energy, your best bet is a semiconductor or a multi-junction semiconductor system described in this paper: http://www1.eere.energy.gov/hydrogenandf…

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