Evidence required to demonstrate competence in this unit must be relevant to and satisfy all of the requirements of the elements and performance criteria and include knowledge of: batteries including: meaning of the terms that define aspects of batteries including: amp hour capacity battery cell charge and discharge rate depth of discharge (DOD) nominal voltage primary and secondary cells state of charge (SOC) watt hour capacity major features of commercially available types of batteries suitable for battery storage systems for grid-connected PV systems factors affecting the life of commercially available types of batteries including the estimation of battery life common processes leading to battery failure in commercially available batteries including sulphation and stratification in lead acid batteries charging regimes suitable for commercially available types of batteries hazards associated with handling, installing or maintaining commercially available types of batteries and risk control measures procedures for safe disposal of commercially available types of batteries battery storage energy demand including: load profiles illustrating average demand and maximum demand, based on appliances required during grid outages or during periods of high tariffs total energy demand including: energy required during periods of high tariffs length of time of typical or expected grid outage battery storage systems for grid-connected PV systems including: applications for battery storage including: electrical energy supply direct to loads during periods of high tariffs electrical energy supply during grid outages drivers of grid-connected battery storage purpose of each component in a battery storage system for grid-connected PV system functional block diagrams for typical configurations of battery storage systems for grid-connected PV systems including: multimode inverter/s for connecting to renewable energy, grid, loads and battery storage; this inverter/s provide backup to dedicated loads on grid failure and may: have a built in charge controller for direct connection of a PV array or require a separate charge controller to direct current (DC) couple the PV array and battery two types of inverters comprising, photovoltaic grid-connected inverters and multimode inverters where: both inverter types are connected to the grid and loads via a switching device that provides backup to dedicated loads during grid failure both inverter types are connected to the grid and only the multimode inverter/s provide backup to dedicated loads on grid failure only the multimode inverter/s are connected to the grid; the grid-connected inverter/s are alternating current (AC) coupled to the multimode inverter/s and both types can provide backup to dedicated loads on grid failure charge controllers including: types and applications of charge controllers within the various system configurations specifications of a charge controller including: DC current rating in and out DC voltage operating window and/or rating efficiency output rating diagrams including: electrical schematics of battery storage systems for grid-connected PV systems including modifications to switchboard to cater for specified loads site diagrams to show the locations of equipment, fittings and cabling energy management strategies and/or energy source switching options to reduce the maximum and surge demand, based on load profile analysis inverters including: differences between multimode and grid-connected inverters output rating of a multimode inverter in relation to: capacity for battery charging required maximum demand program parameters for a multimode inverter, for the correct operation of the system maintenance and installation requirements including: maintenance schedule for battery storage systems for grid-connected PV systems specification of the installation and maintenance requirements for battery storage systems for grid-connected PV systems taking into consideration safety and relevant industry standards, regulations and manufacturer requirements system design including: determining the system yield/performance, equipment costs, maintenance requirements, budget and overall lifecycle costs relationship between the system components: PV array, battery storage and inverters/controllers and the system design criteria size and selection of the battery storage to meet the system performance requirements selecting and sizing the balance of system components including: earthing isolation and switching devices protection devices WHS/OHS policy, workplace procedures and instructions. |