Off-grid photovoltaic (PV) solar power system or segmented circuit system
The Off-grid photovoltaic (PV) solar power system has been designed for cases where an electrical supply is not available or when certain solar power converted circuits within a house can be separated from the main electrical supply.
Off grid photovoltaic (PV) solar power systems, in areas of no electrical power, consist of an off-grid inverter, battery bank, solar modules and a solar charger.
The photovoltaic (PV) solar power system will be installed in the southern hemisphere, facing north. The angle of inclination for the solar panels depends on your proximity to the equator. These modules will be connected in parallel as this increases the amperage which is required for effective charging.
The PPT solar regulator tracks the sun's maximum yield and optimizes the use of the solar energy provided during the day. This provides up to 20% more charge capacity than a system using a standard regulator.
The batteries are used to store energy for use during periods of darkness or poor light conditions. The panels can be over sized to provide excess power during the day which will directly run the home while still charging the batteries. These systems are more expensive than the grid-tie systems since they include batteries and additional regulatory equipment.
For a home where an electrical supply already exists, certain circuits within the house can be solely provisioned by your photovoltaic (PV) off-grid system.
A typical scenario for home owners wanting to go marginally off-grid will be the separation of the circuits feeding the computer and security systems, fridges, deep freezers, TV sets and the like from the rest. This reduces reliance on the grid for appliances which run constantly and minimises disruptions caused by load shedding and power failures. For lighting in a standard house you could look at a 1000Wh system.