Results to August 2012

Our solar PV system has been installed for two complete years as of 24 August, it will be the end of September when we have 2 years of full monthly data. Here are my results to date. First I show the monthly revenue in Table 1. August 2010 data (and revenue) is not complete since the system was connected on 24 August.
Comparing 2011 and 2012 months January to August, we see that in particular January, April, May were good months. Interestingly, even after a beautiful summer this year (albeit with very low precipitation), June, July, and August there was only about $50 difference between 2011 and 2012 these 3 months combined. Clearly it was the difference between the winter and spring months that is making 2012 a good solar year for me.

Table 1. Monthly revenue totals for 4.9 kWe solar PV system.

Sum - Revenue, daily	Years
Date	2010	2011	2012	Total Result
Jan		$136.10	$205.18	$341.29
Feb		$220.57	$258.66	$479.22
Mar		$449.77	$456.57	$906.34
Apr		$395.30	$501.84	$897.14
May		$428.51	$607.72	$1,036.24
Jun		$567.19	$573.10	$1,140.30
Jul		$616.75	$611.45	$1,228.19
Aug	$131.53	$528.09	$577.23	$1,236.85
Sep	$351.28	$423.49		$774.77
Oct	$360.90	$313.65		$674.55
Nov	$285.03	$253.69		$538.72
Dec	$62.74	$176.31		$239.05
Total Result	$1,191.47	$4,509.43	$3,791.76	$9,492.66

I've listed kWhr generation summary in Table 2. below. It is interesting that the longest days being in June and July certainly translate to additional generation with July having the highest combined amounts over two years. Don't be fooled but the Total Result column with August showing the highest result - there was a full week of generation in August in 2010 that is being tallied. The 2011 + 2012 total is 1378 kWhr, notably less than the June and July totals.

Table 1. Monthly power generation totals for 4.9 kWe solar PV system.

Sum - Daily kWhr	Years
Date	2010	2011	2012	Total Result
Jan		170	256	426
Feb		275	323	598
Mar		561	569	1130
Apr		493	626	1119
May		534	758	1292
Jun		707	715	1422
Jul		769	762	1531
Aug	164	658	720	1542
Sep	438	528		966
Oct	450	391		841
Nov	355	316		672
Dec	78	220		298
Total Result	1486	5623	4728	11836

I will share some additional statistics and parameters in my next post.