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Dina

May 2014 renewable statistics

WOW. I was blown away by this month's solar statistics. This is our first May with the new panels, and a truly impressive one it was.  We still ended up with generator hours, nevertheless -- I turned the a/c on 24/7 as soon as the weather called for it, because pregnancy makes me very intolerant of excess heat.  Howard has since adjusted the charging parameters on the batteries, however, so we may have had higher generator hours than we would have had the batteries already been optimized.

We more or less skipped spring this year.  We had winter-cold weather clear up toward the end of April, and all of the spring flowers bloomed a few weeks later than normal.  Then May brought a week or two of what I'd call legitimate 'spring' weather and then leapfrogged right into summer.

May 2014 Solar Statistics:
Peak daily production: 42.33 kWh (13.92 higher than April)

Lowest daily production: 7.92 (5.23 higher than April)
Days of 35+ kWh production: 9 (9 more than April)
Total monthly production:  846 kWh (430 kWh higher than April)
Average daily production:  27.29 kWh/day (13.43 higher than April)
Generator hours: 18 (18 more than April)

May 2014 wind statistics:
Total generated: 147.74 (74.26 lower than April, 17.46% of solar production
Windspeed: 8.7 average, 68.8 max
Power: 211 average, 3221 max

Previous May statistics for comparison:

May 2013 Solar:
Peak daily production: 20.55 kWh (1.52 kWh lower than April)
Peak instantaneous production: 3654 watts (113 watts lower than April)
Lowest daily production: 3.53 kWh (3.15 kWh higher than April)
Days of 20+ kWh production: 2
Total monthly production: 439 kWh (100 kWh higher than April)
Average daily production: 14.16 kWh (2.86 higher than April)
Generator hours: 18, a whopping 75 hours lower than April despite running the AC! The new batteries are doing a great job!


May 2013 wind statistics:
Total generated: 112.47 kWh (66.49 lower than April; only 15.14% of solar production). This is a record low wind production, ever since the turbine was installed, but I'm fairly sure at this point that it's due just to an amazingly still spring rather than a glitch with the turbine.
Windspeed: 7.7 mph average, reported 0 max (which is obviously wrong, but resetting the wind statistics seems to have fixed that glitch)
Power: 158 watts average, 2989 peak

May 2012 solar statistics:
Peak daily production: 20.21 kWh (1.46 kWh lower than April)
Peak instantaneous production: 3423 watts (50 watts lower than April)
Lowest daily production: 2.93 kWh (0.63 kWh lower than April)
Days of 20+ kWh production: only 1 -- 6 fewer than April!
Total monthly production: 462 kWh (17 fewer than April)
Average daily production: 14.90 kWh (1.07 less than April)
Generator hours: a whoppingly painful 89.  I don't have time to check right now but I think that's probably our worst ever since getting the solar installed.  Though some of that was supporting AC usage during part of the month, I suspect the vast majority of it was due to the generator issues we were experiencing, plus the debugging time, almost none of which was productive (ie, it wasn't charging the batteries while running).

May 2012 wind statistics:
Total generated: 60.27 kWh (only 13% of solar production)
Windspeed, in mph: 6.4 avg, 29.5 max
Power generated: 84 watts avg, 2922 max

May 2011:

Solar:

Peak daily production: 21.28 kWh (.5 lower kWh than April)
Peak instantaneous production: 3415 watts (343 watts lower than April)
Lowest daily production: 2.28 kWh (1.37 higher than April)
Days of 20+ kWh production: 1 (1 less than April)
Total monthly production: 391 kWh (65 more than April)
Average daily production: 12.61 kWh (2.09 higher than April)

Generator hours: 17

Wind:
110.51 kWh generated (284 kWh less than April).   28.3% of solar output.
Average production: 3.56 kWh/day (9.18 kWh/day less than April)
Average windspeed: not recorded; anemometer still broken
Maximum windspeed: ditto
Average power production: 160 watts (442 watts lower than April)
Maximum power production: 3277 watts (226 lower than April)

May 2010:
Peak daily production: 21.29 kWh (a slight decrease from April's 21.63)
Peak instantaneous production: 3406 (148 watts lower than April's 3554)
Lowest daily production: 0.52 (April: 1.96)
Days of single digit production: 9 (April: 6)
Days of 20+ kWh production: 2 (April: 11. This is the #1 reason May was much less stellar than April for solar stats!)
Total monthly production: 440 kWh (still only 44 less than April, due to an abundance of above-15-but-below-20 kWh days)
Average daily production: 14.19 kWh (2.14 kWh less than April)
Total generator hours: This we're not quite sure on, since Don forgot to record generator hours at the end of the month. May's weather and June's were pretty similar, though, and we had 28 generator hours total between the 2 months, so for calculation purposes I'm going to estimate that half should be allocated to each month. So: estimated 14 hours.
Estimated renewable shortfall: 84 kWh, average of 2.71 kWh/day. That's another 1.5 kWh better than the actual for April -- which means another record low! -- though 2.67 higher than what I estimate April's would have been without the solar hot water system testing.
Average daily usage: 16.90 kWh/day (a smidgen higher than April's estimated value of 16.73 if one excludes the solar hot water testing, but our lowest actual value yet!)

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Dina

July 2015

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