Page 87 - GRIHA Manual Volume III - Introduction to National Rating System
P. 87
80 GRIHA Manual: Volume 3
1. Stand-alone: These systems can generate, store, and deliver power without depending on the
electricity grid. Small stand-alone SPV systems can power systems like:
• Home lighting
• Street lights
• Water pumps
• Garden lights
• Illuminated hoardings
Depending on the nature of the load, stand-alone SPV systems are designed with or without storage
battery.
Stand-alone SPV systems without storage battery: These systems are the simplest and least
expensive as compared to other types of photovoltaic systems. They are designed for usage only
during the day. The appliances use electricity as and when electricity is generated. Depending on
the magnitude of the incident solar radiation, the electricity output of these types of systems varies
during the day. These systems are generally used for water pumping application.
Stand-alone SPV systems with storage battery: These systems have batteries for storing
electrical energy to operate during night or during cloudy weather conditions. Batteries store the
electrical energy generated by the SPV modules and power can be drawn from the batteries as and
when required.
Figure 1 Stand-alone photovoltaic system
2. Grid-interactive: These systems are connected to the electricity grid. DC electricity generated by
the PV system is converted to AC electricity at the grid voltage through a specially designed inverter.
1. Stand-alone: These systems can generate, store, and deliver power without depending on the
electricity grid. Small stand-alone SPV systems can power systems like:
• Home lighting
• Street lights
• Water pumps
• Garden lights
• Illuminated hoardings
Depending on the nature of the load, stand-alone SPV systems are designed with or without storage
battery.
Stand-alone SPV systems without storage battery: These systems are the simplest and least
expensive as compared to other types of photovoltaic systems. They are designed for usage only
during the day. The appliances use electricity as and when electricity is generated. Depending on
the magnitude of the incident solar radiation, the electricity output of these types of systems varies
during the day. These systems are generally used for water pumping application.
Stand-alone SPV systems with storage battery: These systems have batteries for storing
electrical energy to operate during night or during cloudy weather conditions. Batteries store the
electrical energy generated by the SPV modules and power can be drawn from the batteries as and
when required.
Figure 1 Stand-alone photovoltaic system
2. Grid-interactive: These systems are connected to the electricity grid. DC electricity generated by
the PV system is converted to AC electricity at the grid voltage through a specially designed inverter.
