Solar Math

This page shows estimated annual solar production associated with different quantities of panels. However, your consumption will likely vary seasonally over the course of a year.

Panels

Price

Total Watts

Est. Solar Power Produced (kWh/year)

Sample Power Equivalents*

1 $499 315 382
2 $998 630 764 Avg. annual electricity use of a refrigerator
3 $1,497 945 1146
4 $1,996 1260 1528
5 $2,495 1575 1910 Avg. electricity use for AC in a small office for three months of summer
6 $2,994 1890 2292
7 $3,493 2205 2674
8 $3,992 2520 3056
9 $4,491 2835 3438
10 $4,990 3150 3820 Avg. annual energy use of a residential electric hot water heater
11 $5,489 3465 4202
12 $5,988 3780 4584
13 $6,487 4095 4966
14 $6,986 4410 5348 Six months of electricity use by avg. of US home
15 $7,485 4725 5730
16 $7,984 5040 6112
17 $8,483 5355 6494
18 $8,982 5670 6876
19 $9,481 5985 7258
20 $9,980 6300 7640
21 $10,479 6615 8022
22 $10,978 6930 8404
23 $11,477 7245 8786
24 $11,976 7560 9168
25 $12,475 7875 9550
26 $12,974 8190 9932
27 $13,473 8505 10314
28 $13,972 8820 10696 Annual electricity use for the avg. US home
29 $14,471 9135 11078
30 $14,970 9450 11460

SOURCE:
Energystar.gov. These are national averages. Energy efficient appliances, lighting and buildings use less energy.