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glatt · 07-30-2008, 04:12 PM

According to that FAQ,

It takes 4 hours at 800 watts to compress enough natural gas to go 50 miles. A lot of people commute 50 miles round trip each day, so you would have to run this almost every night. That's around 1000 hours a year. And Phill is designed to last for 6000 hour of operation. So it will only last 6 years.

800 watts time 1000 hours a year is 800 kilowatt hours. The average cost of a kilowatt hour is 9 cents. So this will cost $70 a year to run plus the $600 or so per year of amortizing the cost of Phill.

So we are talking about using $670 a year to use Phill. YMMV.

07-30-2008, 04:12 PM	#21
glatt ™ Join Date: Jul 2003 Location: Arlington, VA Posts: 27,717	According to that FAQ, It takes 4 hours at 800 watts to compress enough natural gas to go 50 miles. A lot of people commute 50 miles round trip each day, so you would have to run this almost every night. That's around 1000 hours a year. And Phill is designed to last for 6000 hour of operation. So it will only last 6 years. 800 watts time 1000 hours a year is 800 kilowatt hours. The average cost of a kilowatt hour is 9 cents. So this will cost $70 a year to run plus the $600 or so per year of amortizing the cost of Phill. So we are talking about using $670 a year to use Phill. YMMV.