What's the cost to install electric vehicle EV charger at home in Australia or NZ?
This is a question we’re asked on a daily basis. The cost to install an EV electric vehicle charger at home in Australia can vary widely depending if you have a Tesla or a Nissan LEAF or Hyundai Kona. Some cars like Hyundai Ioniq come with a granny charger but recommend a wallbox such as the Zappi so you can charge faster and from solar. While there’s no real average cost to have an electric car charger installed at home though you should reasonably expect an ev charger installation to cost ‘from $700’. There are a number of factors which influence the final cost. First of all we should cover off what’s required for a safe and compliant installation.
The standard electric car wall charger is a single phase 32 amp or 7kw unit such as the Zappi or Tesla HPWC and can charge at up to 50km of range per hour connected. Note some vehicles such as the Outlander PHEV and early LEAFs can only charge at 3.3kw or 15km per hour but it’s still recommended that you install a 7kw or 32 amp EVSE as a minimum so as to future proof yourself for electric vehicles such as the Hyundai Kona and Tesla Model 3 which can charge at that maximum rate.
EV chargers at home need a dedicated 32 Amp or 7kw electricity circuit
Every home ev charger needs a direct supply from your distribution board. It’s not possible to simply convert or extend an existing powerpoint or GPO as the amount of charge current needed to charge your electric vehicle requires a dedicated circuit. This means the distance between your distribution board and your preferred location for your wall box will have a bearing on the cost of your ev charger install. So for example of your ev charger is to be installed next to your distribution board then the cost for install will be economical but if we need to trench to run the power cable or if you need your ev charger to be on the other side of a double storey home then the effort and materials may be far greater.
Will my distribution board need an upgrade before I can charge my electric vehicle at home?
Another factor to consider is the condition of your distribution board. Many older homes still have older style ceramic fuses rather than safer residual current devices (RCD) which will necessitate a board upgrade. Even if your distribution board doesn’t need an upgrade there may be dodgy previous work which our ev charger installer is legally bound to make safe or isolate (that means turn off!) before he or she leaves your home.
Supply Protection & Supply Capacity Limitation and Your Home Electric Vehicle Charger
Your electric vehicle will be the largest appliance in your home and as such may contribute to you exceeding capacity supply limit for your home. In extreme cases, especially with new dwellings a Design After Diversity Maximum Demand or DADMD calculator will be required. Our installer may perform this type of calculation for you at the time of installation and will advise you of any constraints or risks. A common way around such supply constraints is to use a Zappi which can dynamically monitor the electricity used not only by your EV but your home as a whole, then reduce the charge rate accordingly.
I want the fastest EVSE or EV Charger installed at my home!
Of course you do! But before we install the fastest EV Charger at home you may need to consider a main switch upgrade. Many homes have only a relatively low rated main switch of say 40 or 50 amps. This might be fine for your home pre electric vehicle but if you intend charging at 32 amps then it will be prudent for your main switch to be upgraded to 63 or 80 amps provided the cable from the street is rated accordingly. Ask us how we can make this happen for you.
How long does it take to install an EVSE or Electric Vehicle Charger at home?
Again this is a very common question. Short answer is, depends, but we typically allow for up to 2 x contractors for 4 hours (half a day) to complete each ev charger install. The materials (RCD, cable and isolator - neither of which are cheap) make up the rest of the cost. For a variety of reasons (most of which are above) many customers underestimate the cost of an EV charger install. As per the considerations above a simple GPO or light fitting installation, this is not.
Is 3 Phase power required to charge my EV Charging at Home?
It’s a common misconception that 3 phase power is required to charge an EV or electric vehicle at home. The truth is that it’s possible to charge from a standard 10 amp GPO but at 10 km per hour this is incredibly slow and inconvenient. The other consideration is that most modern electric vehicles such as the Hyundai Kona, the Hyundai Ioniq and the Nissan LEAF can only charge on single phase power. Only electric cars such as the Tesla Model 3 and model S and the Renault Zoe can take advantage of a 3 phase circuit. The real question is do you need to install 3 phase EV Charging at home? The answer is, usually, no. A single phase 32 amp circuit can deliver up to 50km of range per hour connected. Given most Australian and NZ drivers only drive an average of 25km per day half an hour of charging your electric car in your garage or car port is typically enough cover most Australian’s daily driving habits.
Should I install DC Fast Charger at home?
A DC Fast charger has, until recently, been the preserve of commercial locations and transit routes but in some cases where owners have particularly busy days and evenings coupled with a slow on board AC charger then a DC Fast charger at home may be ideal. This has been the case with a number of Jaguar I-Pace and Mercedes EQC owners. A DC Fast charger does require 3 phase power and can charge at up to 25kw in residential homes or 150km per hour but the cost for supply and install will be around $10-20k. This may be considered prohibitive for some but it’s a immensely convenient and fast method of charging your car and with the right quality equipment will be a great asset to your home.