On-grid and off-grid solar systems are two types of solar energy systems that differ in their connection to the electric grid. Here are the main differences between the two:

On-grid solar system

• Also known as grid-tied systems
• Connected to the electric grid
• Provides a reliable power source, supplementing grid power and even feeding unused energy back to the grid through net metering
• Useful when your solar panels are not producing enough energy or when the batteries that store unused solar power have been depleted and need time to recharge
• Allows you to participate in net metering, which compensates you for excess power you generate and send back to the grid

Off-grid solar system

• Not connected to the electric grid
• Entirely independent and relies on battery storage
• Provides peace of mind to homeowners who live in areas with a history of power outages or extreme weather
• Can continue to have access to electricity even when the grid goes down
• Requires high-capacity battery storage and a backup generator to ensure access to electricity at all times
• Ideal for places that suffer frequent power outages and rural or remote areas

In summary, the choice between on-grid and off-grid solar systems depends on your specific needs and circumstances. On-grid systems are useful when you want to supplement grid power and participate in net metering, while off-grid systems are ideal for those who want to be entirely independent and have access to electricity even when the grid goes down.