Monthly Energy Use & Energy Production for Greg Kremer's 1 kW wind and 0.96 kW solar RE system

(all values in KWH)

Cumulative Production for first 5 years (June 2004 through May 2010):	7480 KWH
Net sent to grid for first 5 years (June 2004 through May 2010):	3871 KWH net positive
Approximate amount of coal that would have been burned to produce the same amount of electricity (assuming 2kWh / kg coal)	3740 kg, or 8228 pounds
Approximate amount of CO2 reduction	15,000 pounds

Approximate monthly averages for my production and use of electricity

	Overall
Produced	110 kWh/month
Used	50 kWh/month
Sent to grid	60 kWh/month

Seasonal averages for my production and use
(as of December 2007, after 34 months of full production)

	Spring	Summer	Fall	Winter
Produced (kWh/month)	135.5	106	95	111
Used (kWh/month)	41.2	49	44	55
Sent to grid (kWh/month)	94.3	57	51	56

2010

Date	Total Produced	Cumulative Production	Actual Use	Sent to grid	Cumulative sent to grid
Jan 10 to May 10+	475	7480	341	134	3871
June 10 to Sep 10	408	7888	152	256	4127
Oct 10
Nov 10
Dec 10

+ gas line problems led to little to no gas service during this time,
increasing use of electricity

2009

Date	Total Produced	Cumulative Production	Actual Use	Sent to grid	Cumulative sent to grid
Jan 09	See combined numbers for Oct 08 – Jan 09 below
Feb 09	129	5916	53	76	3086
March 09	161	6077	40	121	3207
April 09	149	6226	30	119	3326
May 09	119	6345	39	80	3406
June 09	113	6458	40	73	3479
July 09	85	6543	42	43	3522
Aug 09	103	6646	56	47	3569
Sept 09	90	6736	36	54	3623
Oct 09	75	6811	42	33	3656
Nov 09	100	6911	25	75	3731
Dec 09	94	7005	88	6	3737

2008

Date	Total Produced	Cumulative Production	Actual Use	Sent to grid	Cumulative sent to grid
Jan 08	106	4528	58	48	2329
Feb to March 08	219*	4747	88*	131*	2460
April 08	118	4865	31	87	2547
May 08	126	4991	30	96	2643
June 08	122	5113	41	81	2724
July 08	100	5213	60	40	2764
Aug 08	108	5321	42	66	2830
Sept 08	100	5421	43	57	2887
Oct 08 to Jan 09 *	366	5787	243 (for 4 months)	123	3010

* Included an ice storm that resulted in power outage, and 4 days of no production from turbine
and solar panels due to being covered in ice.

2007

Date	AC In	AC Out	AEP Meter	Total Produced	Cumulative Production	Actual Use	Sent to grid	Cumulative sent to grid
Jan 07	1223^	1800^	199704^	105^	3173	228^	-123^	1546
Feb 07	1305^	1828^	199678^	110^	3283	84^	26^	1572
March 07	1345	1920	199589	132	3415	43	89	1661
April 07	1378	2048	199464	161	3576	36	125	1786
May 07	1414	2147	199370	135	3711	40	94	1880
June 07	1450	2226	199294	115	3826	39	76	1956
July 07	1496	2292	199233	112+hp	3938	51+hp	61	2017
Aug 07	1539	2360	199178	111	4049	56	55	2072
Sept 07			199113	105	4154	40	65	2137
Oct 07	1612	2482	199066	90	4244	43	47	2184
Nov 07	1647	2543	199008	96	4340	38	58	2242
Dec 07	1688	2584	198969	82	4422	43	39	2281

2006

Date	AC In	AC Out	AEP Meter	Total Produced	Cumulative Production	Actual Use	Sent to grid	Cumulative sent to grid
Jan 06	698	994	-350	128	1843.5	44	84	978
Feb 06	741	1084	-433	133	1976.5	49.5	83	1061
March 06	776	1178	-522	130	2106.5	41	89	1150
April 06	806	1306	199988**	157.5	2264	40.5	117	1267
May 06	837	1393	199911	116	2380	39	77	1344
June 06				101.5	2481.5	58	43.5	1387.5
July 06	916	1517	199824	101.5	2583	58	43.5	1431
Aug 06	959	1573	199779	99	2682	54	45	1476
Sept 06	995	1620	199741	83	2765	45	38	1514
Oct 06	1031	1688	199677	104	2869	40	64	1578
Nov 06	1073.5	1716.5	199651	71	2940	50	21	1599
Dec 06	1128	1790	199581	128	3068	58	70	1669

2005

Date	AC In	AC Out	AEP Meter	Total Produced	Cumulative Production	Actual Use	Sent to grid	Cumulative sent to grid
Jan. 05	254.5	144	28988	47.5	549.5	48.7	-1.2	215.5
Feb. 05	298	181	28956	81	630.5	49	32	247.5
Prior to this date the battery charger was not temperature compensated, leading to a significant decrease in recorded production levels. Therefore, the values for Feb 05 and earlier should not be included in predictions of potential system output.
Mar. 05	341	270	28870	132	762.5	46	86	333.5
Apr 05	373	379	28767.8	141	903.5	38.8	102.2	435.7
May 05	408.5	458.5	28699.5	115	1018.5	46.7	68.3	504
June 05	420	559	28612	112	1130.5	24.5	87.5	592.2
July 05	463.5	618.5	-25 *	103	1233.5	42.5	60.5	652.7
Aug 05	508.5	669.5	-63	96	1329.5	58	38	690.7
Sept 05	544	747.5	-133	113.5	1443	43.5	70	761
Oct 05	588	779	-155	75.5	1518.5	53.5	22	783
Nov 05	621	867	-235	121	1639.5	41	80	863
Dec 05	660	904	-266	76	1715.5	45	31	894

2004

Date	AC In	AC Out	AEP Meter	Total Produced	Cumulative Production	Actual Use	Sent to grid	Cumulative sent to grid
			29204.2
June 04	NA	NA		75 KWH	75 KWH
July 04	22	NA	29129.6	75	150			74.6
Aug. 04	60.5	18.5	29087.5	80	230	37.9	42.1	116.7
Sept 04	100.5	70	29047.5	91.5	321.5	51.5	40	156.7
Oct. 04	140	92	29033.1	61.5	383	47.1	14.4	171.1
Nov. 04	167	121	29007.7	56	439	30.6	25.4	196.5
Dec. 04	207	144	28987.5	63	502	42.8	20.2	216.7

· The "AC In" meter records energy to the core loads (battery backup, refrigerator, furnace fan, and a few lights and outlets).

· The "AC Out" meter records energy to all other loads (very small amount) plus the amount sent to the grid.

· AEP meter values are my readings of the meter at the end of the month (*new digital meter installed,
**digital meter reset to 200000 in April to allow for backwards readings).

· ^ : gas furnace failed and heat pump was used during a very cold week, leading to greatly increased use of electricity. The heat pump apparently is not routed through the AC out meter, so it is only reflected in the AEP meter readings.

· hp=heat pump. It is sometimes used for cooling when I have visitors. I try to indicate months that it is used since I do not believe the electricity it uses is directly metered by my system (it is included in the AEP meter).