99% of the advertised Charge Rate for 99% of the time.
What does this mean?
Standard grid tied EV chargers have a serious flaw, notably they assume that you have a big enough grid supply. The available charge rate is directly linked to the available grid supply, this literally means that whatever your grid supply, it's divided by the number of chargers. Why is this a problem?
if you advertise that you've got 150 kilowatt EV charges and you have several of them but you don't have sufficient grid supply what happens is when customers arrive is that the available supply is divided by the number of charges that are charging, This Results in customer dissatisfaction because you're 150 kilowatt charger is now only outputting 35KW. A recent study over three years by ZPN's partners SuperHub found across around twenty sites in the southwest of England that the average charge rate over three years had dropped from 43 kilowatts to just 34kW. Despite a number of those charges being advertised as 'high speed' or 'RAPID or ULTRA Rapid' very few actually delivered the advertised charge rate.
The primary cause of this is what is known as load balancing. We like to refer to it as the supermarket trolley effect, think of it like this You've been to the supermarket and you've filled your trolley However when you get to the till you discover that whilst you've been going round the supermarket have removed some of your favourite items so that they were available for other customers. you wanted your expectation when you went to the supermarket was to be able to fill your trolley with all the goods that you'd wanted including those favourite chocolate muffins, only to find out that you weren't allowed to buy them because there wasn't enough to go around all customers. I guarantee in this situation you probably wouldn't visit the supermarket again But this is the reality of modern electric vehicle charging. It is however unnecessary.
Below is a comparison between grid tied and patented HUBZ battery boosted electric vehicle charges. The easiest way to demonstrate this is to pick a typical site operated by a CPO near you. Typically, a charge point operator will install between four and 25 EV chargers but for this example we will use a simple 10 charger setup for our demonstration.
We will show the comparative difference both site will deliver in revenue and performance by comparing the solutions.
Grid Tied Chargers
HUBZ Battery Boosted Chargers
10 × 150 kW Grid Tied Chargers
Simultaneous ultra rapid charging
All three drew 120kW each.
None
100% Grid Used only when charging plus load balancing
Grid is divided between the available chargers, meaning a Porsche Taycan receives the same charge as an MG5. Power is not prioritised fully by need or ability to accept charge.
Energy Communism at work. Average Charge Rate only available 68% of the time
20 x Battery Boosted Chargers
Simultaneous ultra rapid charging
All three drew 120kW each.
1 MW of battery power +
At least 1MW of batteries in our exclusive ring topology where the modular make up means you can charge and discharge the array at the same time.
100% Grid Used 100% of the time.
Energy is harvested at the cheapest time to maximise margin.
Vehicles are charged based on ability and need.
Charge rate maintained 99% of the time up to 40% utilisation (time)
100% of Vehicles Charged
Maximum charge delivery
Vehicles fully charged for afternoon driving sessions planned.
Assuming 10 chargers operating 365 days a year at £0.35 margin per kW at 40% utilisation means HUBZ would generate in excess of £570,000 extra per year.
The Proof
Proving that HUBZ is the premium technology in the space took maths and some real life testing.
The image to your left shows the results of extensive Monte Carlo modelling carried out by EY on our behalf. the diagram displays exactly the performance of HUBZ chargers under significant 40% load. There is a flip side to this the performance is not all about large charging stations as we've demonstrated above. However it does demonstrate the value of HUBZ when compared to a typical grid tied charger.
Where HUBZ further demonstrates its power is the ability to distribute EV energy across multiple smaller grid connections. What do we mean by this? This means you can install 5 or more Ultra Rapid Charges on a significantly smaller sub one megawatt (1MW) connection. This also means that connection is much easier to achieve due to not require reinforment. In real terms you can install a charger array that will generate over £100,000 a year per charger on small or constrained connections that are as small as single phase*.
You can also use hubs in different ways, such as surge demand, distributed energy and where simply the grid connection doesn't support the charging you require. It can also be used purely as a harvesting tool within a microgrid and it can also be merged with other management of power demands.
(*single phase is available but does limit the available charge cycles or charge rate however normally on these connexions a small AC fast charger is the maximum you can achieve)
Power. Stored. Delivered.
Explore ZPN’s advanced battery energy storage solutions engineered for scalability, mobility and total energy independence.
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ZAPME
ZAPME - the world's simplest and most portable solution to mobile electric vehicle charging, EV recovery and on-demand local electric charging. Find out more about ZAPME and how it could benefit you.
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