Efficiency: A good inverter should be highly efficient in converting DC power from the solar panels into AC power that can be used in your home or fed back into the grid. Look for inverters with high efficiency ratings, typically above 95%.

Power output: Choose an inverter with a power output that matches the size of your solar panel system. An over-sized or under-sized inverter can lead to performance issues, so it's important to choose the right size.

Reliability: A reliable inverter is essential for the long-term performance of your solar panel system. Look for inverters with a good track record for reliability, and be sure to choose a brand that offers a solid warranty.

Compatibility: Ensure that your inverter is compatible with your solar panel system and meets local electrical codes and regulations. Your solar installer should be able to advise you on this.

Monitoring and control: A good inverter should come with monitoring and control features that allow you to track your system's performance and troubleshoot issues remotely. Look for inverters that offer mobile apps or web-based monitoring tools.

Safety features: Look for inverters that include safety features such as surge protection, ground fault detection, and automatic shut-off in case of a fault.

Cost: Consider the cost of the inverter and balance it against its features and benefits. While it's important to choose a quality inverter, you don't want to overspend and compromise on other parts of your solar panel system.