I was pleasantly surprised that PG&E includes graphs for usage and billing history on their website. You can view electricity usage and charges in a pretty neat (but simple) graph.
I’ve been living in my current apartment since March 2007 which is the first data point on the x-axis. I wonder if there is a limit to how many months they show?
Making it easier to compare
The electricity usage is obviously seasonal and you can see the ups and downs in the graph. It would make more sense to have a 1 year wide graph and overlay last years data over the current data in a line or area chart. This would make the comparison easier and more meaningful. Alternatively a 12-months trend line would provide additional information but with a significant delay.
I created the above graph using Google Docs. I like the look and it makes comparing the charges from one year to the next a lot easier. Even adding another year shouldn’t impact readability. Now I have to find out why I’m paying 15-20% more this year.
It would also be interesting to compare usage and charges in the same graph. Am I paying more because I’m using more or because electricity is more expensive?
What are other companies providing?
Not much. I would love to have similar graphs for my bank account, credit card and phone bill. In fact I initially started this post rambling about AT&T and how they make it really hard to look at usage history. I’ll save that for another post. Maybe I’ll whip out Greasemonkey and create a little script…
Update 7/8/08: I’ll have to check out Skydeck for my AT&T billing needs. Still in closed beta.