A solar PV power system is a technology that converts the energy from sunlight into electrical energy. Residential solar PV systems can offset much of your household’s power needs, depending on the size of the system and your household’s needs.
In a typical system, a set of photovoltaic modules, or ‘solar panels’, is installed on the roof of your home. The energy generated by these panels is passed through an inverter which creates electricity to match that coming in from the electricity network operated by Power and Water. This electricity then feeds into your local electricity network via the electricity meter. The meter records the amount of electricity produced and this information is provided by Power and Water to your electricity retailer to offset your electricity bill.
As the popularity of solar PV systems continues, Power and Water regularly updates its policy on solar PV installations to ensure the network continues to operate reliably and as many customers as possible can participate.
As of 1 May 2017, Power and Water has revised connection policy for rooftop PV and made key changes to the existing PV policy which will support customers as they try to reduce their usage and as battery technology becomes cheaper. Following changes will be implemented:
Class 1 change from 4.5kW/6kW panel sizing to 5/7kVA inverter sizing. Battery Energy Storage (BES) allowed with ramping, export will still be limited by PV inverter install
Class 2 now includes residential customers wishing for larger PV systems. No export allowed, BES systems may be used with ramping.
Class 3 allows customers to install BES with ramping (sizing to be reviewed as part of assessment)
Class 4 customers must have ramping with level to be assessed.
A 5kW solar PV system will produce enough energy to offset almost all consumption for an average domestic user, depending on the system installed