They may not have copyrighted the phrase but Go Big or Go Home certainly describes Texas and Texans.
Our sample assumes a 10 KW solar PV installation and installed cost of $3.00 per watt. This keeps the math simple and allows you to estimate your own needs for your own property based upon electric bills.
Dallas gets on average 5.5 sun hours per day. Using a 10 KW solar PV system one could expect to produce about 14,952 kWh annually, or 1,246 kWh per month which is about even with the average home electric usage of 1,156 kWh for the State. Estimated Annual Savings would be $1,642. At a $30,000 total cost to install your simple payback is in 18 years.
Houston, more or less same as Dallas, gets about 5.3 sun hours, which produces 14,384 kWh annually or 1,088 monthly. Estimated annual savings are about $1,579, which gives a payback in about 18 years also on a $30,000 system install cost.
While Texas generally has an excellent average number of sun hours per day, the low cost of electricity in the state gives solar a relatively long period til breakeven.
The above payback calculations do not take in to account any incentives, State or Federal. If you want to run your own analysis for your home town feel free to check out how we calculate solar power using PV Watts Database. If you want to learn more about various incentives, all the information you need can be found through the DSIRE database.