If you generate renewable electricity in your home or business, you can feed back into the National Grid any electricity that you don't use. Under the Smart Export Guarantee (SEG) scheme you will be paid for every unit (kWh) of electricity that you feed back to the National Grid. You will need to have your solar PV system installed by a MCS Certified Solar PV (Panels) Installer like NXTGEN Energy, as you are required to have an MCS Certificate. An MCS Certificate proves that your Solar PV System has been correctly installed to MCS standards.