How many Panels do I need
The performance of your system will vary according to its capacity, the number of people who are using it, how much hot water they use, how frequently it is used and the climate you live in
The number of panels you are going to need will depend on
- How much water you are trying to heat or
- how big your storage tank is
- Your demand for hot water or
- how many people are using it for showers each day
- how long those showers last and
- do you wash up after every meal
- do you have other requirements for hot water
Other factors can effect the efficiency of your system
- Is your tank well insulated
- Are the supply lines from your solar heating panels insulated
The information given here is a guideline and provided as general advice only
Size of Tank |
Number of users |
Showers/day |
Wash-ups/day |
Extra usage |
Number of panels |
Up to 25 Lt |
1 to 2 |
1 to 2 |
1 to 2 |
occasional |
1 |
25 to 50 Lt |
2 to 3 |
2 to 3 |
2 to 3 |
2 times / day |
2 |
50 to 75 Lt |
3 to 4 |
3 to 4 |
3 to 4 |
3 times / day |
3 |
more than 75 Lt |
Multipule |
More than 3 |
4 or more |
3 or more times/ day |
4 or more |