Maximum wattage from small solar panels connected in series can reach up to 600 watts, 2. Shadowing affects performance unpredictably. Wiring solar panels in series means connecting the positive terminal of one panel to the negative terminal of the next, which increases the system's voltage while maintaining the same current. This configuration is particularly suitable for high-voltage applications and works optimally with MPPT. Use our solar panel series and parallel calculator to easily find which common wiring configuration maximizes the power output of your solar panels.