NHP Technical News
For this reason, systems of this nature commonly offer the
capability to perform load management as well. In cases where a
cloud-based billing and authentication system is being
used, primary load management from that system, backed up
by an electrical load management system designed to open
contactors at a slightly higher threshold in the event of loss of
communications or any other failure on the part of the cloud-
based system, is considered by NHP to be acceptable practice.
Pricing for this style of cloud-based software management
solution in the Australian market (at the time of writing) is on the
order of $350- $400 per year per EV charging station, handled as a
subscription/contract service.
Full power available (e.g. 4 AM)
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Limited power available (e.g. 3 PM)
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Figure 2
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Low power available (e.g. 5-7 PM)
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WHAT METHODS ARE AVAILABLE TO
PROVIDE BILLING FOR EV CHARGING
No Billing Systems/Indirect Billing
The next question after ‘how do we supply the power?’ is
typically ‘who pays?’ There are many examples of cases where no
special arrangements need to be made for billing, some of the
more common ones are given below.
In a typical Australian household, the EV charger in the garage
or carport can be supplied from the load centre in the house,
downstream of the household utility meter. This means that the
householder will simply see the cost of the electricity used to top
up the battery in their car overnight in their usual electricity bill.
So, no special arrangements for billing are necessary.
It is becoming more common in retail locations around the
world to provide AC EV charging in customer car parks at no
direct cost to the driver, to attract the electric vehicle owner to
the shopping centre in the first place, and to then increase the
amount of time the driver spends in the shopping centre. No
special arrangements for billing are necessary in this case either;
the assumption is that the cost of electricity to the site operator
will be greatly outweighed by the additional spend in store.
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