The maximum system voltage in a solar panel, also known as the open-circuit voltage (Voc), varies depending on the panel's specifications and the number of panels connected in series.
Here's a breakdown:
- Open-Circuit Voltage (Voc): This is the maximum voltage a solar panel can produce when no current is flowing. It's a key parameter listed on the panel's datasheet.
- Series Connection: When solar panels are connected in series, their voltages add up. This increases the total system voltage.
- Maximum System Voltage: The maximum system voltage is typically determined by the inverter's capabilities. Inverters have a maximum voltage input rating, which should not be exceeded.
For example:
- A single solar panel with a Voc of 45 volts can produce a maximum system voltage of 45 volts.
- If you connect two panels in series, the maximum system voltage becomes 90 volts (45 volts + 45 volts).
- However, the maximum system voltage will always be limited by the inverter's maximum input voltage rating.
It's crucial to consider the inverter's maximum input voltage when designing a solar panel system. Exceeding this limit can damage the inverter.
In summary:
- The maximum system voltage in a solar panel is determined by the open-circuit voltage (Voc) of the panels and the number of panels connected in series.
- The inverter's maximum input voltage rating limits the overall system voltage.
