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Advise your accurate latitude and longitude plus the names of your three closest major towns (triangulate if possible). The information will be normally emailed back to you within 10 days.
The following is an example of part of what you will receive - this is for Perth in Western Australia.
| Peak sun hours for -32°S, 116°E | |||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
Tilt angle |
Jan |
Feb |
March |
April |
May |
June |
July |
Aug |
Sept |
Oct |
Nov |
Dec |
Average |
Best all year (1) |
6.8 |
6.6 |
5.9 |
5.2 |
4.2 |
3.9 |
4.0 |
4.5 |
5.3 |
6.1 |
6.5 |
6.7 |
5.0 |
Optimised summer (2) |
7.4 |
6.9 |
5.2 |
3.8 |
2.6 |
2.3 |
2.4 |
3.0 |
4.3 |
5.5 |
6.6 |
6.9 |
4.7 |
Optimised winter (3) |
5.9 |
6.0 |
5.7 |
5.2 |
4.4 |
4.2 |
4.2 |
4.5 |
5.2 |
5.6 |
5.7 |
5.8 |
5.1 |
Grid connect (4) |
6.8 |
6.6 |
6.0 |
5.1 |
4.2 |
3.9 |
4.0 |
4.4 |
5.3 |
6.1 |
6.5 |
6.8 |
5.1 |
This information is for the geographical co-ordinates shown within one degree of latitude and longitude.
Our recommendations
1. |
Stand-alone - a tilt angle of 32 to 37 degrees will provide a good all round compromise. |
|---|---|
2. |
Stand alone - a tilt angle of 17 to 32 degrees will give a higher summer input - at the expense of winter. |
3. |
A tile angle of 32 to 47 degrees marginally improves winter input with a minor loss in summer. |
4. |
Grid connect - a tilt angle of 17 to 25 degrees is best for the maximum power desirable for grid connect. |
Note - recommended tilt angles are from the horizontal ground plane. |
|
General information
Line 1 is the best all round compromise between summer and winter, consistent with high average output.
Line 2 shows average inputs if the array is otpimised for summer months.
Line 3 shows average if the array is otpimised for winter months.
Line 4 shows the highest yearly input regardless of monthly variations. This is generally best for grid-connect systems.
In all cases it is assumed there is unobstructed sun year-around with the solar array facing true North in the southern hemisphere, and true South in the northern hemisphere and with the solar array at the tiltangle shownin the recommendations. The data may be slightly affected by local variations in altitude.
The date provided is averaged from long term reliable sources. it shows recorrded solar input averaged over preivous years. It is as accurate as possible, as of the date provided. Please bear in mind this data shows only what happened in the recent past. Solar input may be affected by changing climatic phenemona. Because of this no guarantee is given or implied that the monthly input data will relate to the future. Tilt angle recommendations are unlikely to change.
Exact orientation is not required. Variations in tilt and azimuth of +/- 5 degrees make next to no difference.
If you would like this information for your solar project, please fill out the attached form and then proceed to our order page to arrange payment.