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Thursday, December 19, 2013

December Bill, No November?, Overall: Still doing OK

Happy Holidays!  Merry Christmas!  Happy Hanukkah!  
(Insert any other holiday you wish to celebrate)

My daughter wonders what Santa is going to bring her for Christmas...

If you've been keeping track, you may be saying..."uhh December?  What happened to November?"  Well...for some reason Duke Energy did not send me a bill.  And I cannot find my November information online except for what Duke wants to bill me.  It's as if November never existed.  Unfortunately, Duke Energy would not take the actual dollar value of the bill and make that disappear too.  In any event in the lack of actual data, I'll post what my TED5000 unit says I did.  So...without further ado...below my November and December usage data.

November 2012  (Oct 2 - Nov 1)
Energy Consumed = 509 kWh
Billing Days = 30
Average Daily Usage = 16.97 kWh/day  (Ranks as #5 best month ever) 
Heating/Cooling Degree Days = 217
Weather Normalized Usage = 2.35 kWh/HD
Bill =$58.14

November 2013  (Oct 2 - Nov 2)  <--TED5000 setup to always be 2nd to 2nd
Energy Consumed = 651 kWh
Billing Days = 31
Average Daily Usage = 21.0 kWh/day  (24% increase in usage)
Heating/Cooling Degree Days = 191 (minus 15 days where there were <5 CDD/HDD)
Weather Normalized Usage = 1.76 kWh/HD
Bill =$64.02 (from Duke Energy.  TED Estimate = $78.19).

Based on the Bill amount, I'm guessing TED was WAY off.  At $0.11/kWh, my usage should be in the neighborhood of 560 kWh comparing to 2012.  That's a 20% error.  If you compare October's Bill, TED says I used 746 kWh while my Bill said I used 595 kWh which adjusts up to 664 kWh adjusting for the bill having 28 days and TED having 31 days.  So TED is about 15-20% off on those two months.

December 2012  (Nov 1- Dec 3)
Energy Consumed = 970 kWh
Billing Days = 32
Average Daily Usage = 30.31 kWh/day
Heating/Cooling Degree Days = 533
Weather Normalized Usage = 1.82 kWh/HD
Bill =$98.52

December 2013  (Oct 28 - Dec 1)  <-- Back to Duke Energy Billing Cycle 
Energy Consumed = 951 kWh
Energy Produced = 45 kWh  <--Panels energized midday 11/4, but not producing fully until midday 11/11.
Net Energy Consumed = 906 kWh
Billing Days = 34
Average Daily Usage = 26.65 kWh/day  (12.1% reduction from 2012)
Heating/Cooling Degree Days = 530
Weather Normalized Usage = 1.71 kWh/HD
Bill =$96.66

The good news here is that without factoring in the solar panels, I used less energy in 2013 than I did in 2012.  And that's with roughly the same Heating Degree Days.   Including the energy I generated, easily puts me at well below my 2012 usage by ~12%.   So far this month, according to TED, I'm on a similar pace to be just right around my 2012 consumption without the solar panels.  Apparently, the weather has been similar to last year also.  Through yesterday, the preliminary weather data is showing we've used 310 HDDs or 17.22 HD/day.  Extrapolating to 32 days, we're on pace for 551 HDDs compared to 533 in 2012.