Photovoltaic Process (PV) PV devices collect sunlight and convert it into electricity.Solar Heating and Cooling (SHC) - These types of devices are designed to reduce the use of natural gases and fuels. Concentrating Solar Power (CSP) - Mirrors are used as the main source to derive solar energy from the suns rays. This latest technology is gaining

Ideally, the switch should take no longer than 17 days from the date you arranged to change supplier. This allows for a 14 day "cooling off period" where you can change your mind about switching. This comes after energy regulator Ofgem challenged gas and electricity companies to cut their switching times.

The best energy companies in the country are Southern Company, NRG Energy, Ameren, NextEra Energy, PPL, ExxonMobil, Baker Hughes, Duke Energy, Conoco Phillips, and Chevron.