19
Jun
Updated solar stats pages.
I’ve updated my solar stats pages with 30-day and 90-day reports. Take a look!
Continue Reading →17
May
Solar monitoring is back up, bugs fixed.
By slacy|General, solar|Be the first to comment!
I’d been struggling to find time to debug the problems I’ve been having with my solar monitoring system. Well, after filling up my hard drive with 60+GB of logs, I finally have deployed a fix to production, and the new service is running 24/7. (thats a bit of work-speak for everybody) It’ll take another week [...]
Continue Reading →15
May
Weather on your desktop
By slacy|General, solar|Be the first to comment!
One of the interesting questions about having a solar system is how does the weather affect solar production. Specifically, how does temperature effect the panel output. If I ever had spare time and money, I’d get one of these WMR918 units, and run wx200d to collect the data, and compare that to the solar output. [...]
Continue Reading →26
Apr
Graphing my solar system’s output.
By slacy|General, solar|Be the first to comment!
I’ve set up rrdtool to collect and graph the output of my solar system, as well as some other interesting numbers. Check it out!
Continue Reading →14
Apr
17W shy of theoretical maximum output.
By slacy|General, solar|Be the first to comment!
As of 3:15pm today, my solar system was only 17W shy of its theoretical maximum output. I was shocked when I looked at the inverter and meter, which both confirmed the same numbers. Theoretical output is: 22 panels * 175 Watts each * 95% inverter efficiency = 3657W The system was outputting 3640W just a [...]
Continue Reading →10
Apr
Solar is turned on for good!
By slacy|solar|Be the first to comment!
PG&E came out and installed and inspected my NEM (Net Metering) system today. This means that I can (and have!) turn on my solar system for good! The NEM E7 meter records total usage as well as “peak” usage in kWh. PG&E has approved only 5000 of these E7 style meters for the whole year [...]
Continue Reading →27
Mar
My eeeevil twin
By slacy|solar|Be the first to comment!
Stephen Lacey is the host of “Inside Renewable Energy” which is supposedly the #1 Renewable energy podcast! Here’s a big shout out from one Steve L. to another!
Continue Reading →26
Mar
Feinstein & renewable energy.
By slacy|solar|Be the first to comment!
Today, I filled out the form on solar-nation.org. It sent e-mails for me to Dianne Feinstein, Anna Eshoo and Barbara Boxer. Boxer & Eshoo sent generic “thanks for your feedback” e-mails, but the awesome Dianne Feinstein sent this: March 26, 2007 Mr. Stephen Lacy Mountain View, California 94041 Dear Mr. Lacy: Thank you for writing [...]
Continue Reading →25
Mar
Vernal Equinox and solar production.
By slacy|solar|Be the first to comment!
So, in my last post, I postulated that the average solar production for the year was equal to the production on the equinox. After pondering this for a while, I realized something else. The issue is the angle of the sun. The panels are oriented to be about perpendicular to the summer sun at noon, [...]
Continue Reading →24
Mar
13 kWh produced today.
By slacy|solar|2 Comments
I know. I’m not supposed to have the system turned on until the PG&E and city inspections are complete, but I couldn’t resist leaving it on for the day (or for the weekend) to see how much electricity it produced. Its not quite sunset right now, but its close, and we just broke the 13.0 [...]
Continue Reading →Twitter Updates
- Now I'm thinking about Python Generators like they're sockets. Yowza. 9 hours ago
- @kstrauser yeah, I'm reading up on the poorly documented send() method now. 10 hours ago
- To break your reddit habbit, use this mantra: Facebook is bad, screenshots of facebook are the raw untreated sewage of the internet. 11 hours ago
- Is "x = yield y" the same as "x = y; yield x" in #python? What's the definition of the result of a yield statement? docs.python.org/reference/simp… 14 hours ago
- @svachalek Yup. That's in contrast to the fake one that's been going around. :) 14 hours ago
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