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.
How Much Does a 10kW Solar System Cost? As of January 2017, the average cost of solar in the U.S. is $3.26 per watt ($32,600 for a 10 kilowatt system). That means that the total cost for a 10kW solar system would be $22,820 after the 30% Federal ITC discount (not factoring in any additional state rebates or incentives).