±R22k incl 3 panels is the median. Escaping Eskom will come at a price. It is best to see it as an investment, not an expense. ROI of 50% per year. Nothing will give you that. Best to get the highest wattage panels you can. Your element also needs to be correctly sized for optimum performance.
For more info https://greensolarguys.co.za WhatsApp 060 531 0599 Edenvale, Johannesburg