The internal resistance of lithium ion batteries is fairly flat throughout the charge cycle.
Also a good equation, but it resolves a different variable (power rather than voltage).
-
Want to remove ads? Register an account and login to see fewer ads, and become a Supporting Member to remove almost all ads.
ARENA/NRMA national fast charging network
- Thread starter Chuq
- Start date
Names on the charger - Delta.
evse.com.au
Delta DC Wallbox Rapid Charger | 25kW - EVSE Australia
The Delta DC wallbox 25kW allows you to charge electric cars faster. The ideal DC Charger with both CCS 2 and CHAdeMO connections.
evse.com.au
RichardV
Member
These guys sell them for 18k.
Surely NRMA could at least release some renders or actual detail.
techau.com.au
NRMA testing Australian-first off grid EV fast charger prototype - techAU
Looking for the latest news, reviews, and insights on technology in Australia? Look no further than our tech website! From the newest gadgets to the latest software releases, we've got you covered with up-to-date information and expert analysis. Stay ahead of the curve and explore the world of...
techau.com.au
I once did a back-of-the envelope calculation as to what it would take to build a completely off-grid 2 x 175 kW DCFC. You’d need about 1200 solar panels and two Tesla Megapacks, total cost around $3M. If you could sell that electricity at $1/kWh (not unreasonable in the middle of nowhere) you’d need 15-20 cars per day buying 50 kWh each just to break even in 10 years, let alone make a profit, assuming no financing or other operational costs (e.g. maintenance, land leases, backend costs etc). It’s doable with Government funding covering part of the capex, but a very tough gig.
RareEarth
Member
Cars per day won't be a problem on the main highways. This data from Mainroads WA taken at Eucla on the Eyre Highway shows around 600 vehicles per day (half of which are trucks):
https://reportingcentreresources.ma...a/traffic_map/CS/Hourly Volume.52123.2023.pdf
There are a couple of other variables here:
- If they build at (e.g.) a roadhouse site, that roadhouse probably runs off a diesel generator now. The same solar/battery setup could be used to replace the diesel on site there. So that's another possible consumer of the energy (although I can't imagine the total energy used is going to be a lot compared to 15-20 cars per day charging)
- In NRMA's case, across 117 sites they can use the revenue from their busier sites to offset their less busy sites. Or at the moment it's probably more accurate to say they use the revenue from the other parts of their business to offset all of their EV charging sites, but this will change.
I'm also curious to see what happens when NRMA sites overlap with others. At Broome or Port Hedland for example, the towns are big enough that it probably makes sense for there to be two different fast charging sites in different locations. But when both NRMA and the WA EV Network plan to install at the Billabong Roadhouse … there's nothing but the roadhouse for hundreds of kilometres in each direction, and both networks have said they're planning to build a solar/battery setup to accompany their off-grid fast charger sites. Are there really going to be two completely independent solar/battery systems at each of these off-grid roadhouses?
RichardV
Member
A lot of the proposed locations are still in populated localities with limited and costly generator power. I think the government should be looking at using this as an opportunity to provide green energy solutions in remote locations. This may even save these locations some money and have a better return on investment. There is some state overlap here as some locations will have a state run and subsidised microgrid(I guess nowadays maybe private energy distributor but still state subsidised).
However if all 300 of those passenger vehicles per day were EVs, you’d need more than 2x175 kW DCFCs to support them. The whole solution would need to be scaled, and while there would be some efficiencies as the site got larger (Erlang tables) the underlying economics of how many cars per station per day you needed for the numbers to stack up might not improve much.
Blue heaven
Fair Dinkum Tesla
That’s been in place at Balladonia for nearly two years and has proven to be reliable despite the occasional time charging needs to be restarted There is a lower cost and less bulky brand with the same output that a few drivers have been using as portable units that also appears to have so far proven to be reliable.
RichardV
Member
NRMA are looking to fast track Mount Isa site for before end of this year.
It was deferred during this meeting then followed up the next week during a extra meeting
Provisional location,
It was deferred during this meeting then followed up the next week during a extra meeting
Provisional location,
Glad to see there's another network going in outback QLD. Gives me more confidence there will be a site operational with the QESH so unreliable
Midnight Man
Member
Here's a giggle for the evening.
Scone NRMA charger (can be seen on PlugShare) is not showing in the NRMA app.
I'm heading up that way tomorrow!
Scone NRMA charger (can be seen on PlugShare) is not showing in the NRMA app.
I'm heading up that way tomorrow!
Only the sites that have switched to paid charging are showing in the app, so enjoy the last of the free charging!
The South Australian RAA App is a bit awkward too. Its like they have put a window inside a window and scrolling around it is not very intuitive. You can move the map around around with one finger to a certain zoom level, then you have to use two otherwise the whole page moves around, then you zoom out and it resets to the highest zoom level.. Plugshare is a heaps better interface.Depends which part of the App. Only paid chargers appear in the “EV Chargers.. Find, Charge, Pay” part of the App, but all chargers appear in the “Near Me… EV Chargers” part of the App. Obvious, innit
Similar threads
