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Aug. 3rd, 2014

Dina

April 2014 renewable statistics

April 2014 Solar Statistics:
Peak daily production: 28.41 kWh (10.65 kWh lower than March)

Lowest daily production: 2.69 (1.38 higher than March)
Days of 35+ kWh production: 0 (3 fewer than March)
Total monthly production:  416 kWh (113 lower than March)
Average daily production:  13.86 (3.20 lower than March)
Generator hours: 0 (parity! and 9 fewer than March)

April 2014 wind statistics:
Total generated: 222.00 (111.16 lower than March, 53.37% of solar production)
Windspeed: 9.5 average, 53.5 max
Power: 319 average, 3585 max

Previous April statistics for comparison:


April 2013 Solar:
Peak daily production: 22.07 kWh (8.61 higher than March)
Peak instantaneous production: 3767 watts (275 watts higher than March)
Lowest daily production: 0.38 (0.61 lower than March)
Days of 20+ kWh production: 1
Total monthly production: 339 kWh (162 kWh higher than March -- nearly double!)
Average daily production: 11.3 kWh (5.59 kWh higher than March)
Generator hours: 93, 106 fewer than March -- and all attributable to April 1-16th, before the new batteries were installed.  We haven't needed the generator even once since the new batteries were installed on April 16th.

April 2013 wind statistics:
Total generated: 178.96 (47.32 lower than March,  52.8% of solar production)
Windspeed: 7.6 mph average, 37.1 max
Power: 247 watts average, 3437 max

April 2012 solar statistics:
Peak daily production: 21.67 kWh (.15 kWh lower than March)
Peak instantaneous production: 3473 watts (37 watts lower than March)
Lowest daily production: 3.56 kWh (2.35 kWh higher than March)
Days of 20+ kWh production:7 again -- the same as March -- with 5 of those days over 21 kWh production!
Total monthly production: 479 kWh (16 more than March, despite one less day in the month)
Average daily production: 15.97 kWh (1.03 kWh more than March)
Generator hours: 28 (7 less than March)

April 2011:

Solar:
Peak daily production: 21.78 kWh (0.16 higher than March, and .10 higher than previous record from March 2010)
Peak instantaneous production: 3758 watts (302 higher than March)
Lowest daily production: 0.91 kWh (0.09 lower than March)
Days of 20+ kWh production: 2 (3 less than March)
Total monthly production: 326 kWh (15 more than March)
Average daily production: 10.52 kWh (0.49 more than March)

Generator hours: 0

Wind:
395.05 kWh generated (85.35 more than March, setting yet another new record high). 121% of solar output.
Average production: 12.74 kWh/day (2.75 more than March, and also another new record).
Average windspeed: 1.9 mph reported, but anemometer broke completely early in the month
Maximum windspeed: 61 mph reported, but again, I don't believe it in the least!
Average power production: 602 watts (159 higher than March)
Maximum power production: 3503 (111 lower than March)

April 2010:

Peak daily production: 21.63 kWh (just a hair lower than March's 21.68)
Peak instantaneous production: 3554 watts (104 watts lower than March)
Lowest daily production: 1.96 kWh (.79 kWh better than March)
Days of single-digit production: 6! (This is what really made April such an outstanding month: very few low-production days. That's 9 days better than March, and our second-best month since system installation. Best ever was August 2009, with only 5 single-digit days.)
Days of 20+ kWh production: 11! (2 better than March's record-breaking 9.) It's also worth noting that we also had an additional 5 days of production between 19 and 20 kWh.)
Total monthly production: 484 kWh (120 kWh better than March, 108 kWh higher than our previous monthly record from Nov. 2009)
Average daily production: 16.33 kWh (4.89 kWh better than March, 1.47 kWh higher than our previous monthly record from Aug. 2009)
Total generator hours: 21 (18 fewer than March, and 13 fewer than our previous best since I started recording generator hours, Nov. 2009. And 19 of those 21 hours were in the first 10 days of the month, when we were testing Philip's setup for solar hot water; if not for that testing, we would probably have needed only 2 generator hours for the entire month!)
Estimated renewable shortfall: 4.2 kWh including the impact from the test period -- still 3.35 kWh better than March, and 2.6 kWh better than our previous best, Nov. 2009). And as noted above, I estimate that it would have been under 0.4 kWh had we not done the test cycle!

May. 3rd, 2014

Dina

March 2014 renewable statistics

For March we missed recording solar data for the first 6 days of the month, so max and min production does not include those 6 days.  The total for the month, however, should still be accurate.

March 2014 Solar Statistics:
Peak daily production: 39.06 kWh (13.470 kWh higher than February)

Lowest daily production: 1.31 (0.43 higher than February)
Days of 35+ kWh production: 3 (3 more than February)
Total monthly production:  529 (232 more than February)
Average daily production:  17.06 kWh/day (6.46 more than February)
Generator hours: 9 (21 fewer than February)

March 2014 wind statistics:
Total generated: 333.16 kWh (134.97 more than February, 62.98% of solar production)
Windspeed: 9.5 average, 55.3 max
Power: 434 average, 3708 max

Previous March statistics for comparison:


March 2013 Solar:
Peak daily production: a dismal 13.46 kWh(6.22 lower than February)
Peak instantaneous production: 3492 (120 watts lower than February)
Lowest daily production: 0.99 (.8 higher than February)
Days of 20+ kWh production: 0
Total monthly production: 177 (61 kWh lower than February)
Average daily production: a pitiful 5.71 kWh/day (2.79 lower than February)
Generator hours: 199 (151 more than February, and largely attributable to the failing batteries, though production was low as well).

March 2013 wind statistics:
Total generated: 226.28 (2.13 kWh lower than February), 128% of solar production
Windspeed: 9.5 mph average, 40.1 max
Power: 310 watts average, 3405 max

March 2012 solar statistics:
Peak daily production: 21.82 kWh (.49 kWh higher than February, and just barely a new record, by 0.04 kWh -- previous record was April 2011)
Peak instantaneous production: 3510 watts (120 watts higher than February)
Lowest daily production: 1.21 kWh (.68 kWh higher than February)
Days of 20+ kWh production: a whopping 7! (5 more than February)
Total monthly production: 463 kWh! (189 kWh more than February)
Average daily production: 14.94 kWh (5.49 kWh more than Februrary)
Generator hours: 35 (22 less than February)


March 2011:

Solar:
Peak daily production: 21.62 kWh (0.29 higher than February)
Peak instantaneous production: 3456 watts (206 watts lower than February)
Lowest daily production: 1.00 kWh (0.61 higher than February)
Days of 20+ kWh production: 5 (3 more than February. Here comes spring!)
Total monthly production: 311 kWh (106 more than February)
Average daily production: 10.03 kWh (2.72 more than February)

Generator hours: 4 (100% attributable to cistern leak the first week of March -- we had to run big, fast pumps to bring the water level down)

Wind:
309.70 kWh generated ( 7.42 kWh more than February, and a new record high). 99.6% of solar production.
Average production: 9.99 kWh/day (0.81 kWh less than February, despite the new record high, because March was of course 3 days longer than February).
Average windspeed: 9.8 mph (0.4 mph lower than February)
Maximum windspeed: 47.6  (34.5 mph higher than the 13.1 that I didn't believe in February.  It turns out that soon after this the anemometer quit altogether, so I don't trust this number any more than I did February's.)
Average power production: 443 watts (42 watts lower than February)
Maximum power production: 3614 (65 watts higher than February)

March 2010:
Peak daily production: 21.68 kWh, a new record! (We had also set a new record the day prior to that -- 21.61 kWh -- and keep in mind that the record prior to that -- 21.49 kWh -- had only been set in February. It's looking like Don's plan to maximize spring and fall production is working very well.)
Peak instantaneous production: 3660 watts (92 better than February)
Lowest daily production: 1.17 kWh (.92 better than February)
Days of single-digit production: 15 (5 better than February)
New field: days of 20+ kWh production: 9. (February: 2, plus one day that came close. November-January, 0. October, 3. September, 1. August, 0. In other words: we had 50% more days of 20+ kWh production in March than we had had in the entire previous life of the PV system combined!)
Total monthly production: 364 kWh (163 more than February!)
Average daily production: 11.74 kWh (4.56 better than February)
Total generator hours: 39 (28 less than February)
Estimated renewable shortfall: 234 kWh, which works out to 7.55 kWh/day (6.81 better than February)

Apr. 25th, 2014

Dina

Monthly weather log: March 2014

Yes, I missed February.... I'm so far behind!  Statistics for Feb. coming soon, though I can't retrieve the February weather logs at this point.  But here they are for March, before I forget!

march2014monthly

Apr. 3rd, 2014

Dina

February renewable statistics

I am so ridiculously behind on statistics at this point that I'm going to be keeping this as brief and simple as possible, by necessity to allow me to catch up.  Sorry for the lack of detail!

February 2014 Solar Statistics:
Peak daily production: 25.59 kWh (15.13 kWh lower than January)

Lowest daily production: 0.88 (0.8 higher than January)
Days of 35+ kWh production: 0 (2 fewer than January)
Total monthly production:  297 kWh (176 lower than January)
Average daily production:  10.60 kWh/day  (4.66/day lower than January)
Generator hours: 30 (26 more than January)

February 2014 wind statistics:
Total generated: 198.19 kWh (176.31 lower than January, 66.73% of solar production)
Windspeed: 8.1 average, 18.8 max
Power: 304 average, 3586 max

Previous February statistics for comparison:


February 2013 solar:
Peak daily production: 19.68 (0.09 kWh higher than January)

Peak instantaneous production: 3612 (11 watts higher than January)
Lowest daily production: 0.19 (.16 lower than January)

Days of 20+ kWh production: 0

Total monthly production: 238 kWh (16 lower than January -- but keep in mind that February was 3 days shorter, too)

Average daily production: 8.5 kWh (.31 kWh higher than January)

Generator hours: 48 (38 fewer than January)


February 2013 wind statistics:

Total generated: 228.41 (8.19 kWh higher than January), 95.97% of solar

Windspeed: 10.1 mph average, 63 max

Power: 375 watts average, 3471 max

Previous February statistics for comparision purposes:


February 2012 solar statistics:



Peak daily production: 21.53 (2.35 higher than January, and our best yet for February!)

Peak instantaneous production: 3390 watts (99 watts lower than January)

Lowest daily production: 0.53 kWh (0.66 lower than January)

Days of 20+ kWh production: 3, plus 2 more over 19 and one more that just barely missed it -- not bad for February!
Days of single-digit production: 14 (5 better than January)


Total monthly production: 274 kWh (9 more than January, even though February was 2 days shorter)

Average daily production: 9.45 kWh (0.90 more than January, and while low, it statistically looks like that's really pretty good for February solar, more than 2 kWh higher than we've had from solar the past 2 years.  If we had had the turbine working, I'm guessing we would have needed no generator hours at all.)

Generator hours: 57, 7 less than January

Turbine not in service

February 2011:




Solar:

Peak daily production: 21.33 (2.10 kWh higher than January)

Peak instantaneous production: 3662 watts (356 higher than January)


Lowest daily production: 0.39 kWh (.38 higher than January; and like the super-record low in January, it was cloudy, and we had snow on the panels).

Days of 20+ kWh production: 2 (2 more than January. Here comes spring!)

Total monthly production: 205 kWh (20 kWh less than January -- but remember, February was 3 days shorter)

Average daily production: 7.31 kWh (.05 kWh *more* than January)

Generator hours: 16



Wind:

302.28 kWh generated (a whopping 100.43 kWh, nearly 50%, more than January)

Average production: 10.80 kWh/Day!  4.29 kWh/day higher than January, and a tremendously record-breaking 147% of solar production

Average windspeed: 10.2mph avg (2.2 mph higher than January)

Maximum windspeed: here's where we have an issue. It *claims* 13.1 mph max, but I know for a fact that that's wrong.  It was higher than that on many observed occasions during the month.  131, maybe, and it couldn't cope correctly with the decimal point? That seems *too* high to be likely, though it's somewhat possible, since we did have tornado warnings twice this past month.  Likely is somewhere in the ballpark of the 93.6 mph measured for January, I'd guess, possibly/probably a bit higher given the intensity of the storms we've had.

Average power production: 485 (192 watts higher than January)

Maximum power production: 3549 (305 watts higher than January)



February 2010:



Peak daily production: 21.49 kWh, a new record! (2.82 kWh higher than January)

Peak instantaneous production: 3568 watts (7 watts less than January)

Lowest daily production: 0.25 kWh (.2 kWh less than January)

Days of single-digit production: 20 (2 less than January)

Total monthly production: 201 kWh (13 kWh less than January, but of course the month was 3 days shorter, too)

Average daily production: 7.18 kWh (.28 kWh more than January)

Total generator hours: 67 (12 more than January)

Estimated renewable shortfall: 402 kWh, which works out to an average of 14.36 kWh/day (Ouch! 3.7 kWh worse than January)

Feb. 1st, 2014

Dina

January renewable statistics

January was truly an amazing force of nature this year.  We had not just one, but three 'polar blasts,' as the weatherguys called them, in which temperatures dipped to around or below 0, with windchills of as much as -30.  We also had quite a bit of snow, including one memorable part where we had 6 inches on the ground at once (4 inches from one day, 2 from another), which I believe is the most snow we've ever had since moving here. The kids had a heyday playing in it, but they ended up missing over 2 weeks of school as well, the most since the unforgettable winter of 2009 when the ice storms hit.  (And we very well might not be done with missed days yet -- they're predicting snow again for tomorrow night.) We had a pretty scary skidding incident on the north-facing slope of the driveway at one point, and it's still pretty icy; the truck can handle it only with chains on all 4 wheels, and Don and Kailyn have been walking back and forth to the car for a couple of weeks now.  It'd make a good toboggan run, though.

I'm fairly certain that the wind 'production' understates what it could have produced for the month, thanks to multiple days on which the wind blew so much the batteries were completely full and the turbine would cut generation.  (Today is another of those days.  Don is currently vacuuming because we had winds of 24+ mph but all that potential energy was going to waste because the batteries were already completely full.)

January 2014 Solar Statistics:
Peak daily production: 40.72 kWh (5.77 kWh higher than December)

Lowest daily production: 0.08 (0.43 lower than December, and of course yet another day with snow on the panels)
Days of 35+ kWh production: 2 (2 more than December)
Total monthly production:  473 kWh (67 more than December)
Average daily production: 15.26 kWh/day (2.16 higher than December) 1
Generator hours: 4 (20 fewer than December, and unless I'm misremembering, all 4 were on January 1st, while we still had a large houseful for the reunion.)

January 2014 wind statistics:
Total generated: 374.50 kWh (144.36 kWh more than December, and   79.18% of solar production)
Windspeed: 10.8 average, 23.2 max
Power: 555 average, 3571 max


Previous January stats for comparison:

January 2013:

Peak daily production: 19.59 (1.55 kWh higher than December)

Peak instantaneous production: 3601 (116 watts higher than December)
Lowest daily production: 0.35 (.04 lower than December)
Days of 20+ kWh production: 0
Total monthly production: 254 kWh (30 higher than December)
Average daily production: 8.19 kWh (.97 kWh higher than December)
Generator hours: 86 (2 more than December)

January 2013 wind statistics:
Total generated: 220.22 kWh January 8th-31st (had forgotten to check earlier in January, but wind during that time was minimal, so can be disregarded for statistical purposes. Total production 93.62 kWh lower than December, 86.7% of solar production.
Windspeed: 9.9 mph average, 28.0 max
Power: 399 watts average, 3369 max


January 2012 solar statistics:
Peak daily production: 19.18 (1.3 kWh higher than December, and pretty darned impressive compared to the rest of the month -- we had only 3 other days over 18.)
Peak instantaneous production: 3489 watts (162 watts higher than December)
Lowest daily production: 1.19 kWh (0.58 kWh higher than December)
Days of 20+ kWh production: 0, par for the course for January
Days of single-digit production (yes, I know I eliminated this category earlier, but it seems significant for January, so re-adding it): 19


Total monthly production: 265 kWh (15 lower than December, which had already been dismal)  
Average daily production: a truly pitiful 8.55 kWh/day (0.48 kWh lower than December)
Generator hours: 64, 7 less than in December.



January 2011:
Solar:
Peak daily production: 19.23, twice (1.07 kWh higher than December)
Peak instantaneous production: 3306 watts (294 lower than December)
Lowest daily production: 0.01 kWh (14.99 lower than December, and probably a record low; not only was it cloudy, but we had 4 inches of snow over the panels!)
Days of 20+ kWh production: 0 (same as December)
Total monthly production: 225 kWh (40 more than December)
Average daily production: 7.26 kWh (1.29 more than December)


Wind:

201.85 kWh generated (9.37 kWh more than December)
Average production: 6.51 kWh/day, 89.7% of solar production
Average windspeed: 8.0 mph (0.7 mph higher than December, but remember that December had several days of the turbine being iced into immobility, which throws off this measurement)
Maximum windspeed: 93.6 mph (9.4 mph higher than December, and our highest measured yet)
Average power production: 293 watts (24 watts higher than December)
Maximum power production: 3244 watts (369 lower than December)

Unlike December, where generator usage was primarily concentrated in 2 particular episodes, January was consistently cloudy and mostly still; as a result, we ended up needing the generator fairly consistently throughout the month.  Overall, though, the total amount needed still wasn't bad: 38 hours, only one more than in December.

January 2010:

Peak daily production: 18.67 kWh (0.36 kWh better than December)
Peak instantaneous production: 3575 watts (157 less than December)
Lowest daily production: 0.45 kWh
Days of single-digit production: 22 (3 more than December)
Total monthly production: 214 kWh (2 kWh less than December)
Average daily production: 6.90 kWh (0.07 kWh less than December)

Total generator hours: 55

Estimated renewable shortfall:  330 kWh, for an average of 10.65 kWh/day (ouch, but about 1.5 kWh/day better than December)
Dina

Monthly weather log: January 2014

Janmonthly2014
Dina

Daily weather log: January 2014

Januarydaily2014

Jan. 30th, 2014

Dina

December renewable statistics

December 2013 Solar:
Peak daily production: 34.95 (1.85 kWh lower than November)
Lowest daily production: 0.51 kWh (0.14 kWh higher than November, and another day with snow on the panels)
Days of 35+ kWh production: 0, but note that that 34.95 came awfully close!  (1 fewer than November)
Total monthly production:  406 kWh (45 kWh lower than November)
Average daily production: 13.10 kWh/day (1.93 kWh/day lower than November)
Generator hours: 24 (The first time we've needed the generator in quite awhile! 24 hours more than November, which was 0 -- mostly attributable to the high demand of the reunion during a very low production period.)

December 2013 wind statistics:
Total generated: 230.14 (26.29 more than November, and 56.68% of solar production)
Windspeed: 9.4 average, 92 max
Power: 339 average, 3584 max

Previous December statistics, for comparison:


December 2012:

Peak daily production: 18.04 (0.84 kWh lower than November)
Peak instantaneous production: 3485 (279 watts lower than November)

Lowest daily production: 0.39 (.62 lower than November)
Days of 20+ kWh production: 0
Total monthly production: 224 kWh (183 lower than November)
Average daily production: 7.22 kWh (6.35 kWh lower than November)
Generator hours: 84

December 2012 wind statistics:

Total generated: 313.84 to January 7th (had forgotten to check earlier, but January wind had been minimal, so can be disregarded for statistical purposes): 189.63 kWh higher than November, 140.1% of solar productio
Windspeed: 9.9 mph average, 96.6 max
Power: 367 watts average, 3330 max

Previous Decembers, for comparison:

December 2011 solar statistics:

Peak daily production: 17.88 kWh, two days a week apart (1.72 kWh lower than November
Peak instantaneous production: 3327 watts (293 watts lower than November)
Lowest daily production: 0.61 kWh (.07 lower than November
Days of 20+ kWh production: 0, par for the course for December
Total monthly production: 280 kWh (21 lower than November)
Average daily production: a dismal 9.03 kWh/day (1 kWh lower than November
Generator hours: 71.  OUCH -- even worse than 2009, before we had the turbine, double what we had in 2010, and 44 more than November.



December 2010, for comparison:
Solar:
Peak daily production: 18.16 kWh (0.99 lower than November)
Peak instantaneous production: 3600 watts (a mere 14 lower than November)
Lowest daily production: 0.15 kWh (0.54 lower than November
Days of 20+ kWh production: 0 (same as November)
Total monthly production: 185 (98 less than November)
Average daily production: 5.97kWh (3.46 less than November, and a full 1 kWh less than last December -- very pitiful solar production!)

Wind:
192.48 kWh generated (46.27 kWh less than November)
Average production: 6.2 kWh/day, 104% of solar production
Average windspeed: 7.3 mph (1.3 mph lower than November, but definitely thrown off by inability of turbine to move despite wind for several days mid-month)
Maximum windspeed: 84.2 mph (16.2 mph higher than November, and our highest measured yet)
Average power production: 269 watts (89 watts lower than November)
Maximum power production: 3613 watts (108 watts higher than November)
Generator hours: 37


December 2009, for comparison:
December was, not surprisingly, not the best month for solar: 216 KwH, which works out to a daily average of only 6.97 kWh. Not surprisingly, this made for a lot of generator time -- I don't have the notebook in front of me currently, but if I remember correctly it was 60-something hours, with an estimated renewable shortfall of around 12 hours/day. (Ouch. We *really* need our wind turbine -- a lot o
those days would have had splendid wind production, had we only had the turbine up to take advantage of it.)   Maximum daily production was 18.31, but we had 19 days of single digit production, half of those under 1 kWh.  The 0.02 kWh on the 19th was a new record daily minimum -- though I have to admit that I was impressed that the panels produced at all while buried under 3 inches of snow!

Jan. 27th, 2014

Dina

Monthly weather log: December 2013

decembermonthly2013
Dina

Daily weather log: December 2013

decemberdaily2013

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