Had to burn off some excess oil from my chainmail hauberk. Thought it was cool
18107 @ 18107 @aussie.zone Posts 3Comments 261Joined 2 yr. ago
18107 @ 18107 @aussie.zone
Posts
3
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261
Joined
2 yr. ago
I really hope those aren't factorials.
Even if cats could talk, and could definately see the stripes, I'm convinced that they wouldn't tell anyone.
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Sorry, 150 pitch fields.
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We have 2 compatible cars. A 2018 Nissan Leaf ZE1 e+ with 62kWh battery, and a 2014 Nissan Leaf ZE0 with 24kWh battery (both Japanese imports). These are total battery sizes, so the usable capacity is lower. The ZE1 seems to be about 50kWh usable, and the ZE0 about 16kWh.
The V2G charger we got is the Wallbox Quasar. It reached end of production in July 2022, and was first approved for use in South Australia in December 2022, 6 months after production ended. I had been contacting everyone I could find to get one, and I was very surprised when JetCharge got back to me a few months later asking if I still wanted one. It took a few weeks to sort out paperwork and logistics, and about a day to install. The unit was about $10,000 and the installation about $5,000 for a total of $15,000.
The Quasar does what it says on the box, but I now understand why Wallbox decided to end production in favour of a new (as yet unfinished) model. The Quasar 1 does not support V2H (at least not well). It has a minimum charge/discharge rate of 6A (1.4kW) so a separate house battery is needed to fill the gap if the house is using less than 1.4kW and you don't want to import or export power to the grid.
It also doesn't have the ability to run during a grid outage. We have a house battery with off-grid capabilities, but we can't legally have the Quasar on the backup circuits because of its ability to overload the house battery. (The same reason the AC and stove are not on the backup circuits).
Both of these issues will likely be fixed on the Quasar 2. The Quasar 2 will be released first as a CCS only model (not compatible with the Leaf), and a CHAdeMO version might be released a year or 2 later, but Wallbox has not confirmed anything yet.
So far I'm happy with the system. It's definitely not for everyone, and needs constant attention to get any benefit from it.
We are currently getting wholesale electricity prices from Amber. Most days we roughly break even on cost, but occasionally the prices spike from 20c/kWh to over $10/kWh. This only happens once or twice a month, but we make more in those days than we pay for the entire month for electricity.
The house battery (10kWh) can export for up to 2 hours, and the car (50kWh) can theoretically export for 10 hours. In practice, the car won't export below 20% (I'm assuming this is a limit in the car, not the Quasar), and it often isn't charged above 80%. This still leaves 30kWh which can last for up to 6 hours at maximum export rate. This is more than enough to cover any possible price spikes, and run the house overnight. The price spikes rarely last more than an hour.
Amber provides some automation for the house battery - importing when prices are low, and exporting when prices are high. They are looking into providing a similar type of automation for V2G. Having to manually set the V2G charger to export during high prices is a nuisance, and without the price push notifications from Amber, we would miss many opportunities to sell to the grid.
The Wallbox app is designed for all Wallbox chargers, and the V2G features seem to have been added as an afterthought. I have encountered several bugs so far, and several design decisions that I don't agree with. Schedules can be set in the app for charging and discharging, but there are bugs with this too. I'm hoping that most of these issues will be fixed before V2G becomes mainstream.
We have a unique situation here. A house with 10kW of solar, a V2G compatible car that's home most of the time, a house battery, and wholesale electricity prices. V2G works really well for us, and I regret nothing. Without these things however, V2G probably wouldn't be worth the current upfront cost.
I have a 2011 Nissan Leaf AZE0 24kWh with about 40% battery degradation. It can drive about 80km (50mi), which is perfectly adequate for a second car. It is rarely driven more than 20km in a day.
My other car is a 2018 Nissan Leaf ZE1 E+ G 62kWh with about 4% battery degradation.
The fastest battery degradation happens when the battery is new, and the degradation slows down gradually over time. I expect the 2011 Leaf to still have at least 50km range in 2041, and the 2018 Leaf to still have at least 200km (130mi) range in 2038. Both of these will still suit my needs.
Most large combustion SUVs are heavier than most electric cars.
Sodium ion batteries are being produced with no rare metals in them, and will be in production cars within a year. Hydrogen is difficult to store due to is low volumetric density, it's molecular size, and corrosive nature.
Hydrogen (fuel cell) cars all have a battery because a hydrogen fuel cell is slow to change it's energy output, so can't change its output fast enough to directly power the car.
Battery electric cars are about 90% efficient from charging from the grid to moving. Hydrogen cars are about 30% efficient from grid to moving when made from renewable energy. These efficiency numbers include the weight and rolling resistance of the car. The theoretical maximum efficiency of hydrogen storage allowed by the limits of physics is about 50%.
The volumetric density of hydrogen is so low that you would need 20 tanker trucks to transport the same amount of energy that 1 tanker truck of gasoline can carry. This is at maximum pressure or liquified.
Hydrogen only makes sense when the weight of the energy storage medium is critical. As demonstrated by American cars, it isn't.
Hydrogen is only 30% efficient compared to 90-95% for batteries. Most hydrogen is currently made from fossil fuels, and contains less energy than the fossil fuels used to make it.
I've had an electric car since 2011. The battery looks like it will last another 10 years.
Early Nissan Leaf batteries degraded relatively quickly (8-10 years) due to poor battery chemistry and no thermal management. Both of these issues have been fixed in all new electric cars (except the new Nissan Leaf which still doesn't have battery cooling).
Even the old degraded batteries are valuable as static energy storage, and several people are using them as house batteries.
Most of the cost of a battery replacement is the manufacturer markup. There is at least one company making replacement Nissan Leaf batteries for significantly less than Nissan, and they include the latest chemistry and liquid cooling (unlike Nissan who just give you a second hand battery).
Most electric cars today have a 10 year warranty on the battery. Manufacturers wouldn't be offering that if there was a reasonable chance you would need to replace the battery in that time.
I'd recommend an electric car for avoiding oil changes, but I think we still have a few more years until cheap second hand electric cars become available.
Friend was idiot. Try to tell friend. Only have calculator. Forgot talking was option. Didn't work.
Yes! I wish I had one (slightly NSFW).
Thalassophobia generator (and drowning simulator).
You're looking for a gun. A gun that makes holes. Not bullet holes.
There are some browser extensions that can do this for you.
Old Reddit Redirect is one I found with a quick search. Also available for Firefox. (I can't remember which extension I use)
Only about 5% of me is a chatbot. The rest of me is mostly human.
Hydrogen made from methane reformation, or from coal powered electrolysis?