Electricity usage is measured by kilowatt hours, or kWh. In 2004 Pacific gas and electric company charged .20 per unit of tier 4 energy used, in 2016 this same tier 4 energy was billed at .349, that’s a 75% increase over 12 years! This information was pulled directly from PG&E’s website. So it makes sense for most people that are in a position to get financing or pay for a solar system out right, to do so.







