So you would want to avoid charging electric vehicles, ideally from the smaller buildings that aren't on that renewable power purchase. So you immediately do some significant things about reducing your CO2 footprint. But once you start purchasing and charging your own vehicles off council's capacity, the charging analysis in the document I largely agree with. Most fleet vehicles are probably only going to be doing maybe 100, 150 k's a day, and that's well within even slow charging. So really, you don't need to be fast charging in most cases. I agree again with the consultant's report. My experience is I've done 45,000 kilometres off my rooftop solar. I have never activated my BMW's charge cards, and in doing that I have saved something like 2,700 litres of fuel in the five years I've owned my i3.
I find charging at 10 kilometres per hour quite acceptable, and you also don't need to upgrade any of the power systems that you're plugging into because you're only running at the equivalent power use of about a one-and-a-half-bar radiator. So you could have two or three cars easily plugged into any standard circuit, in my opinion. So as far as council policy regarding charging, fast charging, etc., you're unlikely to need it for your own vehicles, and they're right. There's only about, well, they did say there's 30 vehicles in the area, so at the writing of that report I was one of 30. I'm probably one of about 40 now. There's a few new Teslas around. I've seen a lovely white one today, for example, but I'm not going to get jealous about that.
Daytime charging where vehicles are parked can be made routine. You just have to get staff into the use of plugging in if there's charge facilities available, as well as overnight charging. If you can charge during the daytime. There's advantages about that that I can mention later. Not mentioned is also the 240 volt outlets of the new tradie-type vehicles that will be coming, because the power batteries run at 300 plus volts. It's easy to build inverters into them that will put 240 volts out, and vehicles will probably, most tradie vehicles will either come with them as standard or with options. Similarly, large other vehicles that you might purchase would probably come with those sorts of facilities.
There's also not mentioned is the potential for the new electric vehicles to go into smart grids. We're already talking, at Origin supposedly, about putting in a grid with a battery. You've got to remember that electric car batteries are capable of probably powering about three houses in parallel overnight because of the size of the batteries. They are large, the electric capacity. Smart grids, there's one in trial in Canberra at the moment that users Nissan Leafs because they have the ability to feed power back into the grid, computer controlled. The grid can demand plugged-in vehicles to feed into the grid, so you can smooth out brownouts and power shortages. You can build resilience into the grid without having to install a battery.
You have to have agreements between the vehicle owners as to what they're prepared to run down, and also the utility pays the owner of the vehicle somewhat of a premium compared to what they're buying electricity at in order for that facility to happen. It's certainly been well written up, and it's been done overseas in some places, so it gives you a way of having resilience in the grid without actually going and installing separate batteries, as was, say, done, for example, with Tesla in South Australia. In South Australia, by the way, the— The Tesla battery was said to have paid back within less than a year or so, simply by allowing the grid to operate more smoothly and the operator not to buy peak power at very, very high prices.
So there's a chance there. A trial like that could possibly be done through University of Western Sydney. Certainly the Nissan Leaf is the car that's mentioned at the moment. Other cars coming in will have the ability. Some can be ordered with that capability of feeding back to the grid. Now, in theory, you can also use the car for your own home battery. Again, that depends on charging requirements, et cetera, et cetera, rather than putting in a Tesla Powerwall or similar. In my case, a thousand kilos of lead-acid battery sitting at 48 volts, you can actually use the car. Cars have massive capacities in those batteries, and for houses that have one or two electric vehicles potentially in the future, that will happen.
One vehicle would probably be the general run-around hack that might only do 40, 50 k's a day taking kids to school, so it would be sitting overnight with a hell of a lot of spare capacity in the battery that could potentially be used overnight to run the house. Again, there's some legislation required and utility cooperation currently involved that would be required. It would certainly give resilience in the Hawkesbury during floods and fires that we've had shutdown of communications, et cetera. If we can do that, if we have vehicles, even tradie vehicles with large batteries capable of running communications, et cetera, in the field when the grid goes down, big tradie vehicles with 100-plus kilowatt-hour batteries could probably run four or five days worth of communication without being recharged.
They could also be recharged off a generator, et cetera. So there's potential to do things that really haven't been considered in the report, but then the report from the consultant is about directly for council's use. Further not mentioned is charging off rooftops. which I do and have done for five and a bit years very successfully. I can also charge off my home battery. So again, this is the slow charge scenario. I simply don't need the fast charge. If I was fast charging at home, it was going to be about another five or six hundred dollars for the semi-fast charge setup. But to go to extreme fast DC charging, the consultants are right, you're talking in probably, you know, $10,000 or more because you simply have to have a lot of big cabling going in.
It's not a cheap option. And then you have to have all the electronics, et cetera, to run it all. So overall, there's potential for improved resilience with these new vehicles that are coming in, especially with the 240-volt power outlets. As these vehicles become routinely available and right through the area, we have potential during floods and fires to keep communications and other things going. It's well worth considering in the longer-term resilience side of the environmental question that we're considering here. Charging during the daytime off the solar system is also beneficial because if you are being paid a relatively small amount to export to the grid, you're better off to use that power during the daytime to charge the car or to run washing machines, etc.
All energy advisors will tell you that. I, for example, get 11 cents a kilowatt hour for export. My buy-in price is 30 cents a kilowatt. So every kilowatt that I can use during the daytime, while I also have batteries so I can run overnight. But if you only have solar panels, you are better off to be using the electricity you generate during sunlight. So charging a car during the daytime is another way of doing things. Now, if you were capable of running the house off the car during at night, you would then have a mobile battery, not a hard-wired battery on the wall like, say, a Tesla or an LG Chem or something or other battery. Another advantage of this charging is in some areas where there's a lot of solar installed, there is a voltage rise that comes during the middle of the day when all the panels are feeding in.
It's called an island effect, and by charging cars and using the power during the daytime, you're putting more demand into the grid directly off your house and you reduce that problem. It's a major problem that's coming with some of the utilities, particularly at the end of wire runs or where there's a large amount of power being generated in a relatively small area with large solar rooftop systems. So there's a lot of opportunities here for council. I really have commended council in the past for what we've done with solar, with heating, etc. We've picked the low fruit. We've done it very carefully, and I would anticipate the same thing will happen with electric vehicles. And quite frankly, if you don't think the electric vehicles are coming, the tsunami is going to hit you a bit like in Tonga.
There's about another six or eight vehicles being released in the last few months. There's a big new Chinese company that's doing fleet buys in Sydney. One of the problems, though, with a lot of the vehicles is at the moment they are short utility-style vehicles, because that's the big part of the general market. It's also done to get the flat battery pack with a low centre of gravity on the bottom of the vehicle. So as far as lease-type vehicles for staff, there are not a lot of sedan-type vehicles on the market, although the Nissan Leaf is one. I'm not particularly pushing Nissan. I could push BMW like crazy, but you probably don't want to be paying $150,000, as you don't want to for the top of the range Teslas.
So Teslas have now come in. But in all of this as well, you've got to be looking at the economics. The dilemma that we have is really the federal government has done bugger all to help with anything with our energy policy. They're being pushed like in the United States to a fair extent by the states and private companies. So anyway, here endeth my discussion. Any questions?