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[Eric]

Occasional daily production numbers to supplement monthly totals, to see effects of different weather and seasons.

Live data may be seen here

Background on the system here

Both mounts at 25 degree tilt.

2009 June 27 mostly sunny: Fixed 3041Wh Tracked 4112Wh. 35% increase.

2009 June 28 mostly sunny: Fixed 2857Wh Tracked 3871Wh. 35% increase.

2009 June 29 mostly sunny: Fixed 2859Wh Tracked 3917Wh. 37% increase.

2009 June 30 very sunny: Fixed 2942Wh Tracked 4195Wh. 42% increase.

2009 July 2 partly cloudy: Fixed 1733 Wh Tracked 2224 Wh. 28% increase.

2009 July 3 partly cloudy: Fixed 1861 Wh Tracked 2017 Wh. 8% increase.

2009 July 5 partly cloudy: Fixed 2379 Wh Tracked 3190 Wh. 34% increase.

2009 July 7 very sunny: Fixed 2931 Wh Tracked 4017 Wh. 37% increase.

2009 July 10 mostly sunny: Fixed 2405 Wh Tracked 3379 Wh. 40% increase.

2009 July 18 very sunny: Fixed 2912 Wh Tracked 4132 Wh.  42% increase.

2009 July 19 partly cloudy: Fixed 1949 Wh Tracked 2438 Wh.  25% increase.

2009 July 26 cloudy: Fixed 1250 Wh Tracked 1538 Wh.  23% increase.

[Eric]

2009 Aug 4 partly sunny: Fixed 2497Wh Tracked 3487Wh. 40% increase.
Here are output curves for one module from each array:

Fixed:


Tracking:

[Eric]

2009 Aug 13 Cloudy. Fixed: 1.8kWh  Tracking: 2.2kWh   22% Increase.

Unfortunately the curves for individual modules are not available on the public site; I'll keep doing occasional screenshots.

Fixed:


Tracking:


Horizontal axis is a little compressed on one of those...


2009 Aug 14  no numbers but interesting curves:

Fixed:


Tracking:



2009 Aug 15

Fixed:


Tracking:

[Eric]

2009 Aug 19th Sunny Fixed: 3kWh Tracking 4kWh 33% increase

[Eric]

2009 Aug 20 Sunny

Fixed:


Tracked:

[Eric]

Sept 4th Tilt Angles on both mounts changed to 35 degrees

Sept 13, cloudy late in the day, Fixed 1.8kWh, Tracking 2.2kWh, 22% increase

Fixed:


Tracker:



Sept 19, late clouds, fixed 2.5kWh, tracking 3.0kWh, 20% increase

Sept 21, afternoon clouds, fixed 2.6kWh, tracking 3.2kWh, 23% increase
Fixed:

Tracking:

Today was much cooler than it has been.

Sept 27, clear, Fixed 2.8kWh, Tracker 3.8kWh, 36% increase.  Now we have near record warm temps.
Fixed:

Tracked:

[Eric]

October 7 2009, mostly sunny, panels are a little dusty from windy weather.
Fixed 2.4kWh, Tracked 3.2kWh, 33% increase

October 10 2009, sunny, Fixed 2.8kwh, Tracker 3.8kWh, 36% increase.

fixed:

tracked:


tilt of tracker now 45 degrees, fixed now at 55 degrees for the winter.  tracker will be adjusted again to also be 55.

October 23 2009 mostly sunny, fixed 2.6kWh, tracked 3.2 kWh, 23% increase

[Eric]

Now that enphase has added ability to get data for any inverter on any day in the past, these posts are less necessary.  Increase from tracking has decreased a little bit with the shorter days.  Note this is versus a fixed mount which is adjusted to a good seasonal angle, currently at 55 degrees from horizontal for the winter season.

November 7 some clouds fixed 16.6kWh tracked 19.8kWh, 19% increase.

November 15 mostly sunny fixed 2.6kWh tracker 3.2kWh, 23% increase.
fixed:


tracker:



Nov 25, sunny, fixed 2.6kWh tracked 3.2 kWh, 23% increase.