They combine the advantages of (PV) island systems and (PV) grid-tied systems, namely battery backup for essential appliances offered by island systems and lower installation and operations outlays offered by (PV) grid-tie systems. It also avoids the loss of unutilised green power by being grid-interactive whilst at the same time supplying power to both essential and non-essential appliances. Unlike with island systems, batteries will not be used when grid power is available, thereby maximising battery lifetimes.

Also, unlike with grid-tied systems the Hybrid system autonomously switches to island operation in cases of grid power failure, which means that your green power will be available even during power outages. The batteries are sized to maintain all the essential appliances in case of grid power failure.

Advantages

• Modular building blocks, easily expandable.
• Easily add optional external power source (grid, generator, or wind power for day or night time supplement)
• High intelligent / efficient inverter technologies used.
• Batteries sized accordingly to power demand for backup time during power failures.
• Batteries only used/cycled during grid power failure conditions.
• No power storage losses, due to grid-tie technology
• Minimum diesel generator fuel used. (Where utility power is not available)