fyi
how much does electricity cost?
http://michaelbluejay.com/electricity/cost.html
adding solar panels
http://www.evo.com/content/2936/solar_basics_-_is_solar_power_a_good_investment
For an average family home, the stats are:
KW Hours Per Year 12,000
KW Hours per month 1,000
KW Hours per day 33.
Power station Kw Required 6 KW per hour.
Cost per KW installed $5,500
Cost of Solar Power Station $33,000
Solar Energy Grants $15,000
Net Cost 18,000.00
Let's say...
You borrow $18,000 at an average interest rate of 6.00%
Repayment per Month 107.92
Ave Cost Per KW Hour 0.11
Yearly Price Increase 6.00%
Inflation Rate 3.00%
Here is how it adds up:
In the First Year your new power station is saving you $110 a month in electricity.
1000 KW hours * 11c = $110
You are paying 107.92 in interest.
So your 1000 kw hours actually costing 2.08 less a month
By year 10 you are saving $77 a month or $935 a year
Over the 30 life years you actually save $65,000 in power bills or $34,000 in today's money from your power station on top of paying back the $18,000 plus the interest it cost you. '' In other states rebates are not as large but is possible to make savings in less than 2 to 5 years.''
This example was provided on Squidoo - Facts About Solar Energy