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.
For those looking for a range for the cost of solar panels, the cost will run from as low as $0.85 per watt to $1.25 per watt with output ranging from 150W to 350W for a typical solar panel. If those numbers seem low, remember that an installation has added costs thanks to the inverters, solar batteries and other additional equipment needed for a complete solar energy system.