What doesn't move, however, is a suspended mass inside the seismograph, called the seismometer. During an earthquake, the seismometer remains still while the case around it moves with the ground shaking. Traditionally, the suspended mass was a pendulum, but most modern seismometers work electromagnetically.
Solar electricity costs about $10 to $12 a watt installed, though you may be eligible for state incentives. Check your utility bill to see your monthly usage. A robust solar electric system will cost about $20,000. You can spend as much money, to receive as much solar electricity, as you feel comfortable with.
The levelized cost of solar is calculated with the following assumptions. First, we use an installed cost for residential solar power of $4.00 per Watt. This number may seem low, as the average cost of residential solar installations in mid-2011 was $6.40.But at the same time, residential solar installations completed under a group purchase have received significantly lower prices.ased on these assumptions, the levelized cost of solar today â without any incentives â varies from around $0.19 per kilowatt-hour (kWh) in Los Angeles to $0.29 per kWh in Seattle. For more discussion on the cost of solar, see the Appendix or for some context, see the Sensitivity Analysis.