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Elements and Performance Criteria
Range Statement
Performance Evidence
Knowledge Evidence
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 measuresprocedures for safe disposal of commercially available types of batteriesbattery storage energy demand including:load profiles illustrating average demand and maximum demand, based on appliances required during grid outages or during periods of high tariffstotal energy demand including:energy required during periods of high tariffslength of time of typical or expected grid outagebattery 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 outagesdrivers of grid-connected battery storagepurpose 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 orrequire a separate charge controller to direct current (DC) couple the PV array and batterytwo 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 failureonly 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 failurecharge controllers including:types and applications of charge controllers within the various system configurationsspecifications of a charge controller including:DC current rating in and outDC voltage operating window and/or rating efficiencyoutput ratingdiagrams including:electrical schematics of battery storage systems for grid-connected PV systems including modifications to switchboard to cater for specified loadssite diagrams to show the locations of equipment, fittings and cablingenergy management strategies and/or energy source switching options to reduce the maximum and surge demand, based on load profile analysisinverters including:differences between multimode and grid-connected inverters output rating of a multimode inverter in relation to:capacity for battery chargingrequired maximum demandprogram 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 systemsspecification 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 costsrelationship between the system components: PV array, battery storage and inverters/controllers and the system design criteriasize and selection of the battery storage to meet the system performance requirements selecting and sizing the balance of system components including:earthingisolation and switching devicesprotection devicesWHS/OHS policy, workplace procedures and instructions. |