Electricity from the wall plug costs about 10 cents per kilowatt-hour (kWh). If you were to get the same electricity by buying AAA alkaline batteries at the local store, the cost of that electricity would be: $1,000 per kWh.
A $1.50 AAA battery delivers about 1 ampere for 1 hour at 1.5 volts — an energy of 1.5 watt-hour. That means it costs $1 per watt-hour, or $1,000 per kilowatt-hour. People sometimes complain about the high cost of electricity, but in fact it is 10,000 times cheaper than battery power.- R. A. Muller
The highest achieved efficiency (solar energy converted to electrical energy) of solar cells is approximately 41%.
Inexpensive solar cells give an efficiency of 10–15%, but the best ones deliver 41% efficiency. The catch is that these cells cost $10 per square centimetre. – R.A. Muller
The highest achieved efficiency (solar energy converted to electrical energy) of solar cells is approximately 41%.
Inexpensive solar cells give an efficiency of 10–15%, but the best ones deliver 41% efficiency. The catch is that these cells cost $10 per square centimetre. – R.A. Muller
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