2 posts tagged “geek”

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Prius Year in Review (2008)

Jan 5, 2009
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Another year of statistics is in the books for the Prius. Nothing much out of the ordinary from previous posts, except it's interesting seeing how quickly the price of gas fell and I didn't have any fillups during the month of September.

The table has a bunch of statistics for the life of the car and then shows the trend over the last 90, 180, and 365 days. Savings comparisons are approximate (I'm calculating based on averages and I'm not sure it's accurate). Pretty charts are below.

	Lifetime	Last 90	Last 180	Last 365
Number of Days in Service	1852	90	180	365
Number of Fillups	129	6	12	28
Miles	46130.1	2107.9	4343.8	9896.2
Gallons	1003.4	46.2	93.1	219.7
Cost	$ 2,558.10	$ 96.01	$ 264.94	$ 685.00
Avg. Days between Fillups	14.4	15.0	15.0	13.0
Avg. Gallons per Fillup	7.78	7.71	7.76	7.85
Avg. Gallons per Day	0.54	0.51	0.52	0.60
Avg. Miles per Tank	357.6	351.3	362.0	353.4
Avg. Miles per Day	24.9	23.4	24.1	27.1
Avg. Cost per Gallon	$ 2.55	$ 2.08	$ 2.84	$ 3.12
Avg. Cost per Mile	$ 0.0555	$ 0.0455	$ 0.0610	$ 0.0692
Avg. Cost per Day	$ 1.38	$ 1.07	$ 1.47	$ 1.88
Avg. MPG	46.0	45.6	46.6	45.0
Avg. Estimated MPG	46.5	46.3	47.1	45.7
Avg. Daily Temperature	50.5	43.0	56.1	52.1
Savings vs. 25 MPG	$2,146.31	$ 79.06	$ 229.37	$ 548.98
Savings vs. 30 MPG	$1,362.24	$ 49.88	$ 146.98	$ 343.32
Savings vs. 35 MPG	$ 802.19	$ 29.04	$ 88.14	$ 196.42
Savings vs. 40 MPG	$ 382.16	$ 13.41	$ 44.00	$ 86.24

Prius MPG for 2008

Prius Lifetime Average MPG by Month

Prius MPG Distribution

Gas Prices

I Have the Power (Monitor)

Aug 9, 2007
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Power Monitor

A little over a week ago I was paying my electric bill online and noticed that my electric company was providing a deep discount on a PowerCost electricity usage monitor ($30 instead of the usual $135), with the discount ending that day (although utility providers in other parts of the country may still be offering some discounts). The inner geek in me (inner? -- who am I kidding...) leapt at the opportunity. It arrived earlier this week and I installed it last night.

The website interface for ordering was pretty bad, and I have to say the device's setup process could use a little improvement (and the number of errors in the documentation is amazing). It took a while, but I eventually got the sensor to recognize the signal from my meter and then communicating with the display unit.

I played with turning a few appliances on and off. A 60 watt bulb adds about 0.1 - 0.2 kWh of usage. I was surprised to learn the 15 year old refrigerator also only adds about the same amount as the light bulb. The computer or TV add about 0.3 kWh. It was hot, so I didn't try turning on the stove.

Now if only you could download the data to a computer and create some nice charts and graphs...