gmm solar energy by rob smith gmm committee on climate change
TRANSCRIPT
GMM Solar Energy
by Rob Smith
GMM Committee on Climate Change
Solar energy is the world's most important energy resource.But the balance of absorption and radiation is critical.
The energy available from the sun can suffice for our needs.We can make use of it from wind-power and solar collectors.
Solar installation of a GMM member
Two grid-tie DC-AC inverters
A sunny day, 2026 watts, January, 2012
Power: 32 Solar Photovoltaic Modules @ 190 Watt => 6000 Watts
Energy:6000 Watts x 90% efficiency x 3.5 hours / day => 19 kWh/day
Cost: $1.65 per watt
32 Modules x $315/module => $10,000Electronics & wiring $10,000Installation $10,000
-----------$30,000
Federal Tax Credit (30%) $9,00-----------
Total after credit $21,000
Payback:At $0.15 per kWh:19 kWh / day * $0.15 / kW => $2.85 / day
$21,000 / $2.85 / day => 20 years
Longevity: 30 years or more
Power: 32 Solar Photovoltaic Modules @ 190 Watt => 6000 Watts
Energy:
6000 watts x 90% efficiency x 3.5 hours / day => 19 kWh/day to Power Grid19 kWh / day x 365 days / year => 7000 kWh / year
Global Warming Savings:
1.9 lbs CO2 per kWh generated (US average)
7000 kWh / year * 1.9 lbs CO2 / kWh => 13,300 lbs CO
2/year
=> 6.65 tons/year CO2 saved !
Over 20 years: => 133 tons CO2 saved !
=> more than weight of house !