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Solar Output Today
Historic Solar Output
Solar Production
- Current power: 0 kWh
- Energy today: 0 kWh
- Energy this week: 103.985 kWh
- Energy this month: 213.558 kWh
- Lifetime energy: 6.110972 MWh
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Author Archives: Eric Sandeen
Comparing PVWatts Estimates to Actual Solar Production
PVWatts is a website run by the National Renewable Energy Lab (NREL) which can be used to estimate how much energy a given solar array might produce, based on historical mesurements of insolation. If you ever have a site analysis … Continue reading
Posted in Energy, Renewable
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Linux Filesystems LOC Update
I did a post last year about how lines of code for some of the primary Linux filesystems were evolving. It seemed to spark people’s interest, so here’s an update through v3.4-rc4: (Click to see full size). I added regression … Continue reading
Posted in Computers, Linux
3 Comments
Opower goes social
I wrote about Opower almost 2 years ago, a company which is working to reduce energy use by simply making people more aware of what they use in comparison with others. At the time of that post, they seemed mostly … Continue reading
Posted in Conservation, Energy, Monitoring
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Monitoring boiler temps with an arduino
Ok, so I have a problem; a measurement & charting problem. The first step is to admit you have a problem; but I don’t yet want to change, it’s too much fun!
Posted in Energy, Monitoring
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pvoutput.org rocks!
(And in other news, I hit 5MWh of lifetime solar production today, woo!) pvoutput.org is a free service run by a mystery man down under, which can accept solar generation as well as household consumption data, and slice, dice, and … Continue reading
Posted in Energy, Monitoring, Renewable
3 Comments
Siri meets wifi thermostat
Oh, man, this is just too cool. And sadly I just upgraded to an iPhone 4, not 4s (I am both a sucker for a deal, and normally filled with buyer’s regret). But anyway, this guy used the Radio Thermostat … Continue reading
Using a wifi thermostat API
I love it when device manufacturers realize that they can do well by selling a device with documented interfaces, in the hopes that a nebulous community of hackers will invent cool new things for it. So I was pretty happy … Continue reading
Therms per Heating Degree Day
In an earlier post I had tried out a few ways to figure out if our energy-saving efforts with respect to natural gas use were paying off; I did a few bar graphs of therms per day, per heating degree … Continue reading
Posted in Energy, Monitoring
30 Comments
Eternal Vigilance is the Price of Efficiency, part 3 – gas
In my last two posts I talked a little about our utility usage for electricity and for water; last up is natural gas usage. (I don’t think I’ll ever start weighing my garbage, but who knows).
Eternal Vigilance is the Price of Efficiency, part 2 – water
In my last post, I talked about how I keep track of our electricity usage, to be sure that our efforts at efficiency & conservation are staying on track. But that’s just one of 3 utilities; water has been another … Continue reading
Posted in Conservation, Energy, Monitoring
5 Comments