To roughly calculate the cost of buying solar panels for your home, determine your monthly energy consumption (kWh), assess your location’s average sunlight hours per day, calculate the required solar panel capacity (kW) via solar calculator, research solar panel prices in your area, and multiply the capacity by the price per kW. Consider additional expenses like installation, permits, and inverters to get a more accurate estimate. Consulting local solar installers can provide further insights into the total cost.