If you produce more than enough energy with your solar panels, do you have to sell the excess energy to the utility company or is there a way to store it for later use?
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{ 4 comments… read them below or add one }
If you are properly on line with the grid, you will be “paid” for excess electricity. Don’t expect much unless you have acres of panels. If you have a small setup, like on the roof, you could have batteries to store the extra or a “heat sink” device that turns the unused electricity into heat that dissipates.
I would take over the world!
It’s really hard to store the energy locally and recover it at a better price than paying the utility company.
In an area that has a “net metering” plan, the utility company acts just like a huge storage battery in practice.
Let’s say you had some actual batteries in your house, and the solar array generated 1 kWh more than you need during the day. You would charge those batteries, then draw the 1 kWh out at night. Net charge from the utility company: zero. But you would still have to buy the batteries and charger, and deal with the hassle of maintaining the batteries.
With net zero metering, if the array generates 1 kWh excess during the day, you drive your meter backwards, effectively selling to the electric company. At night, when you draw out the 1 kWh, the meter advances again, showing a net advance of zero. Net charge from the utility company: zero. Financially the same, except no batteries.
The example above is just an approximation, though. Some utility companies have various ways of charging you even though your net usage is zero.
Grid-tie systems generate electricity sending this energy back to your utility company’s power grid. In effect, this means the utility company will be paying you to produce energy for them, since the energy you produce counts against the energy your home or business uses. http://sites.google.com/site/earthforsolar/what-is-grid—tie
Your solar panels will produce DC (Direct Current) electricity. This electricity will be run through an inverter to produce AC (Alternating Current) electricity. This energy is then run into your AC power panel, which feeds energy back to your utility companies power grid. If your solar power array produced enough electricity, your utility meter would begin to run backward! Not just any inverter will work for grid tie. You need to have a special inverter called a grid tie inverter.
The inverter IC will monitor the volume, frequency and phase of the home grid, then produce a pure sine wave that the frequency and phase will match the grid’s. The volume will be higher than the grid’s, then according to our current controlled PWM, to control the output power to the grid. The inverter will puts out power when the home grid is on.
The main components of a Grid-Tie system are:
Its like have a little more money and most of the time not to often But extra you put in a bank when you need more money or in this case electric you can get more that you had them hold this is with a grid tie inverter and BANK metering
http://sites.google.com/site/earthforsolar/what-is-grid—tie
For low price solar panels for Grid tie http://www.solarcells101.com/