Tuesday, February 26, 2019

Long time no update...

I am not happy with myself for letting this blog wither. So I want to go back to my original assumption that the solar panels would pay for themselves in 6+ years. I have been taking a credit of $1,666.69 cents for the energy I'm saving each year (I could write a volume on how I came up with this figure). I am also deducting the SREC's I receive each quarter. I generate 8 per year, usually 1 in Q1 and Q4 and 3 in Q2 and Q3. The SREC's are paid out with a 6-month delay. The solar installation became cash positive in November of 2017 which is about 6 years and 4 months - so right on schedule. (I don't deduct the electrical bill savings until December...) If I could have done it again, I'd have gotten a larger installation! So I've generated nearly 60MWh of electricity at this point. I'd like to point at that I do not have micro inverters and I do have a shading issue with my neighbors trees. They keep infringing more and more every year. So, one thing I didn't anticipate is a second electric car. So here's some data:
year cost/year (cents) avg. cost/kWh kWh used/year comments
2006$2,326.2718.7511431
2007$2,545.9418.2014022
2008$2,101.2519.1910853
2009$2,115.4619.0511331
2010$1,796.5616.6110818
2011$1,430.2416.618637Solar installed in July
2012$510.4116.913489
2013$1,498.4016.6990661st EV received in January
2014$1,251.9519.2370682nd EV received in September
2015$1,794.5524.188523
2016$2,025.2723.808816
2017$1,087.7521.644672meter broken for 3+ months
free electricity!
2018$1,732.3522.207430
It is a lot of data. Notes: I wasn't always quick to move to a competitive electrical supplier. There have been improvements like moving from incandescent bulbs to CFL's to LED's. A very efficient A/C unit was installed in January of 2018... So, the entire project has been a success...watch this space: