Questions and Answers

Q: If I want information on solar energy, who can I contact for assistance?

A: You can find the most official service in the Department of Energy Solar Program, but you can also turn to private service providers like us, to get more knowledge on specific applications in solar energy.

Q: Where can I find information about solar incentives in my state?

A: The North Carolina Solar Center runs the excellent Database of State Incentives for Renewables & Efficiency which tracks state incentives.

Q: How can I make use of solar energy in daily life?

There are two most common ways to utilize solar energy: one is to change it into electricity by using solar cell (PV panels), another is to use it directly for heating. The electricity and heat produced from both ways can be used for household facilities.

Q: How does a solar cell work?

A: The solar cell produces direct current electricity from light through a photovoltaic effect, and then uses an inverter to transfer direct current into alternating current for daily use, or recharge a battery to store the power.

Q: what is photovoltaic effect?

A: The photovoltaic effect refers to photons of light knocking electrons into a higher state of energy to create electricity. The term photovoltaic denotes the unbiased operating mode of a photodiode in which current through the device is entirely due to the transduced light energy. Virtually all photovoltaic devices are some type of photodiode.

Q: Do PV panels only work in "sunny" places like California or Hawaii?

A: No, PV works across the whole country. In fact, the second leading state for PV installations is New Jersey.

Q: What can a PV system do?

A: Usually, the PV system is on-grid, so that you can use electricity from PVs in the daytime, and use grid at night. By doing this, you can save your electricity bill, and even earn credit by selling extra power back to the grid in the daytime when agreed. If the PV system is off-grid, it is recommended that you have alternative power source besides PVs, to prepare for massive electricity demands.


Q: How do I know if I can set up a PV at my location?

A: You may find out the solar energy intensity for different locations in the US from the official website of National Renewable Energy Laboratory:

Q: Do I need a planning permission?

A: No. Since April 6th 2008, all homeowners can install micro generation equipment at home, when it is not obviously affecting others.

Q: How much does a PV panel cost?

A: It depends on the material, quality and size of the PV panel. You can easily find the price information on main stream online shopping websites. Our price is ~~~, since we partner with Chinese producers, who enjoy low-cost advantage but have reliable certificates from research institutions.

Q: How long do my PV last?

A: It depends on the quality, material and working environment of the solar cells. You should contact the specific company for this kind of information and warranties.