How to Design Off Grid Solar System

BEFORE YOU CONTACT US:

Below is a selection of commonly asked-for information, as well as information we need in order to provide consultation.

Basic Information:

• The highest efficiency of the panels can be reached when they point to the
  south in a 10 - 15 degree angle.
• Surface area needed is 7~8.5square meter per KW peak 
• Dimension of our current panels (550Watt poly panels) is 2278 mm x 1134 mm
• Weight of the panels is 6kg
• 1 KW peak produces around 4~~5.5KW per day (in the year average)
• Avoid shadow on the panels
• The return of investment is around 5 years for grid systems
• Panels and mounting structures have a 10 year warranty (25 years performance 80%)
• Inverters have a 4~5 year warranty

Information we need:

• How much roof top space is available
• What kind of roof is it (flat roof or not, structure, type of surface material, etc)
• What kind of electrical system you have (2 phase or 3 phase, 230 Volts or 400 Volts)
• How much you pay per KW (important for ROI simulation)
• Your actual electricity bill
• Your consumption in daytime (8am - 5pm)

We can provide grid tied systems, off grid systems as well as hybrid systems, depending on the location, the availability of electricity, brownout situation or special customer wishes. Grid tied systems cover your daytime consumption. Perfect for facilities that use energy at daytime when the electricity is produced, like restaurants, bars, schools, offices etc.

If we know your electricity consumption during the day, we will be able to design a system that suits your individual needs best.

A major benefit of utilizing a solar power system, is that it can grow with you. As your power needs increase, you can simply add more capacity to your existing system.

We take: 1 KW solar system peak produces around 4KW per day (in the year average)

(Africa’s sunshine is strong, (in the year average, we can take 5.5hours effective sunshine period instead of 4 hours effective sunshine
That means we will need 135320/5.5=24.60KW solar system   (here we take 30kw)
Based on this requirement, we will recommend a system as below: