Instruction Manual

PowerOptimal Elon® 100 Installation Manual
Version date: 2022/05/23
Page 25 of 37
Version number: 2.20
© PowerOptimal (Pty) Ltd 2022. The content of this document is confidential and all rights to the intellectual
property and/or information contained herein remain vested in PowerOptimal, except if otherwise agreed in
writing.
TABLE C3. PERCENTAGE OF ANNUAL HOT WATER REQUIREMENT
The below example table indicates what % of the annual hot water requirement will on average be
supplied by the system for 2 people each using 80 litres of hot (60 °C) water per day. (The amount of
water heated will vary with weather conditions, by geographic location and by season. Water heated
per day will be significantly lower in winter and significantly higher in summer. These numbers indicate
heating capacity – i.e. if no hot water is used on a given day, there will be less water heated on that
day. This is only an approximate guide.)
Solar + Elon®
Annual average % of hot water requirement supplied for 2 people each using 80 litres of hot
water per day for X kW
p
installed solar capacity
Location
kWh/kW
p
/yr
0.8 kW
p
1 kW
p
1.2 kW
p
1.4 kW
p
1.6 kW
p
1.8 kW
p
2 kW
p
2.5 kW
p
3 kW
p
3.5 kW
p
Bloemfontein
1894
50%
62%
75%
87%
99%
112%
124%
155%
187%
218%
Cape Town
1624
43%
53%
64%
75%
85%
96%
107%
133%
160%
187%
Durban
1447
38%
47%
57%
66%
76%
85%
95%
119%
142%
166%
Jhb/Pretoria
1724
45%
57%
68%
79%
91%
102%
113%
142%
170%
198%
Nelspruit
1627
43%
53%
64%
75%
85%
96%
107%
134%
160%
187%
Port Elizabeth
1565
41%
51%
62%
72%
82%
92%
103%
128%
154%
180%
Upington
1912
50%
63%
75%
88%
100%
113%
126%
157%
188%
220%
Saldanha
1623
43%
53%
64%
75%
85%
96%
107%
133%
160%
186%
Examples:
An array of 1.2 kW
p
will provide approximately 64% of the annual hot water requirement for a family
of two people in Cape Town.
An array of 2 kW
p
will provide approximately 124% x (2 people / 4 people) = 62% of the annual hot
water requirement for a family of four people in Bloemfontein.