victorian electric vehicle trial mid-term report - Department of Transport

Despite these efforts, around one infive dwellings required multiple visitsfrom the installers. Discussions withthe charging infrastructure providerssuggest that around half of thesemulti-visit sites were due to issuesthat may have been possible to discernfrom the initial information and withmore experience on behalf of theinstallers. The residual 10 per centof households for which multiple sitevisits were thought to be unavoidablecould be mostly attributed to thelimited ability to discern the need foran electrical supply upgrade without asite visit. Figure 32 suggests that thisestimate is correct based upon theconclusion that residences built earlierthan 1970 that have not undergonesignificant renovation in the interimare more likely to be in need of anelectricity supply upgrade.5.2.2 How is charginginfrastructure installedin households?Charging infrastructure is installed byelectrical contractors drawing uponinformation supplied by the household.From the time of the contractor beingnotified of the need for an installation,the process to handover usually takesabout five weeks.The average time to install a trialhousehold charging solution was35 days, even if there was somevariability across installations(standard deviation of 17 daysacross 94 installations).Key influences on the installationleadtime include:• The accuracy and extent ofinformation provided beforehanddescribing the household charginginstallation context• Involvement of a third party suchas a landlord or body corporate• The availability and responsivenessof the householder• Stipulation of target dates forthe installation at the time of therequest, and progress trackingthereafter (in other words, workingto a deadline)• Pre-approvals for installationswhere the site works are lessthan a reasonable thresholdvalue ($2,000 was selected forthe trial following the initialround of 14 installations)• The experience of the installer.25%20%Proportion15%10%5%0%1850 1900 1950 2000YearFigure 32. Results from the 2012 trial household application process illustrating the age of the housing stock for potential electricvehicle drivers in Victoria – this attribute was felt to be a key indicator of the need for an electrical supply upgrade (n = 2,200, “Canyou estimate about when your residence was built, or the most recent date it underwent a major renovation?”, DOT 2012b).