Global ASC Solar AI
GLOBAL ASC GROUP
Free tool
Solar PV calculator for South African business
Enter your monthly electricity spend and available roof area to see the system size, panel count, yearly generation and savings for a commercial or industrial solar installation.
Your electricity
Assumptions used
5.2 peak sun hours a day, 80% performance ratio, 5% system losses, 585 W panels, 6 m² per kWp. Complete solar PV project pricing is R12/W below 500 kWp, R11/W from 500–999.9 kWp and R10/W from 1 MWp, excluding VAT. Battery storage is not included and is quoted separately.
Indicative result
333,3 kWp
570
480 827 kWh
68%
R 1 466 521
2,7 years
R 4 000 000
R 3 400 000 – R 4 600 000
456,8 t a year
Your available area limits the system to about 333,3 kWp, below the size needed for the cover you asked for.
Preliminary engineering assessment only. Final system sizing, equipment selection, structural suitability, electrical protection, grid compliance and installation requirements must be confirmed by qualified professionals following site inspection and applicable standards.
Get a detailed assessment
Send us your details and our team will prepare a full sizing, battery option and financial model for your site — at no cost. Prefer WhatsApp? Chat to us on +27 82 799 2339.
How this solar calculation works
Your monthly bill divided by your rate per kWh gives your electricity use. A system's yearly output is its size in kWp multiplied by peak sun hours, days in the year, the performance ratio and system losses — so in most of South Africa one kWp produces around 1 442 kWh a year.
Roof space matters as much as consumption: about 6 m² is needed per kWp, so your usable area caps the size whatever your bill. Savings are the generation multiplied by the rate you pay today, before tariff increases, which lift returns further.