Development of Optimal Tilt Angle Models of a Photovoltaic Module for Maximum Power Production: Ethiopia

Table 3

The seasonal and yearly optimal tilt angle of 44 cities in Ethiopia using the isotropic model, equation (16).

Cities	Winter	Spring	Summer	Autumn	Annual
Adama	32.33	3.33	0	17.67	13.33
Addis Ababa	33	3.33	0	18.33	13.67
Adigrat	37	4.67	0	23	16.17
Arbaminch	29.33	2.33	0	15	11.67
Asela	31.67	3	0	16	12.67
Asosa	33.33	3.67	0	17.67	13.67
Assaita	34	4	0	20.67	14.67
Awash	32.67	3.33	0	17.33	13.33
Awassa	31.33	3	0	16	12.58
Axum	37.67	5	0	23	16.42
Bahir Dar	35.33	4	0	20.33	14.92
Butajira	32.33	3	0	17.33	13.17
Debre Birhan	33.33	3.67	0	18.67	13.92
Debre Markose	33.67	3.67	0	19	14.08
Degehbur	32.67	3.33	0	17.67	13.42
Dek Island	36	4.33	0	21	15.33
Dessie	34	3.67	0	19.67	14.33
Dilla	30	2.67	0	15	11.92
Diredawa	33.33	3.67	0	18.67	13.92
Dubti	34.33	4	0	20.67	14.75
Filtu	29	2.33	0	13.33	11.17
Finoteselam	34.33	3.67	0	19.33	14.33
Gambela	29.67	3	0	15.67	12.08
Gebreguracha	33.33	3.67	0	18.67	13.92
Geladi	31	3	0	16.33	12.58
Ginir	31	3	0	15.67	12.42
Godie	30	2.67	0	15	11.92
Gonder	36.33	4.33	0	21.33	15.5
Harar	33.33	3.67	0	18.33	13.83
Hosaena	30.33	3	0	16.33	12.42
Jima	29.33	2.67	0	16	12
Jinka	28	2.33	0	14	11.08
Kebri Dahir	31	3	0	15.67	12.42
Logia	33.67	4	0	20.67	14.58
Mega	27.67	2	0	12	10.42
Mekelle	36.67	4.67	0	22.33	15.92
Metekle	34.33	4	0	19	14.33
Metema	36.67	4.67	0	21.33	15.67
Mizan Teferi	28	2.33	0	14.67	11.25
Nekemt	32.33	3.33	0	17.67	13.33
Semera	34.33	4	0	21	14.83
Shashemene	31.33	3	0	16.33	12.67
Welyta Sodo	30.33	2.67	0	15.33	12.08
Ziway	32.33	3	0	17	13.08