Solar Usage Offset

Number of days when solar panels produce less than the energy used

Maximum consecutive days with energy deficit from solar panels

Battery capacity needed for 10 - 12 year life without using gas generator in kWh

Number of days when gasoline generator is needed (towards end of battery life)

120%

111

9

180

46

140%

55

5

133

22

160%

47

4

120

18

180%

39

4

106

15

200%

29

3

92

11

220%

26

3

84

6

240%

23

3

83

5

260%

19

2

82

4

280%

15

2

81

3

300%

14

2

79

3