Endless Sphere

I believe that you need in general about 1000% wind/solar installed to have a clear shot and running truly on renewables 1000%. Really? As in, building 10 times the nameplate rating of the equipment? Or 10 times the nominal generation rating? 10 times the nameplate is very generous - I would have s...

My prediction for 2050: Australia will have a HVDC power line crossing the Nullarbor so that West Australian solar energy can be exported to the east coast during periods of high demand. Similarly, East coast solar power can prime WA with energy first thing in the morning. We may even be exporting r...

Well the 800 V to 48 V unit costs $800 or so. And then the 48 to 12 is only about $80. The first stage is capable of 1.3 kW, but the second stage is only good for 320 W... I guess you can parallel several of them if you needed more power, but 30 amps at 12 V is heaps for a bike.

Indeed the cheapest watt is the one you don't need. The way homes are built in Australia is an embarrassment. For an extra 4% we can have draught-proof, well insulated homes which consume little heating energy through winder and through good architecture, stay cool through summer. But we are lazy, a...

Frank I was looking at Vicor products and there are some eminently capable units - however anything over 410 V DC input only seems to output 48 V or more. I assume it's possible to parallel the outputs of two modules - one on each half of the traction pack? Also, I presume these guys aren't current ...

Sevcon do a 1.5 kW DC/DC converter which takes up to 800 V DC and steps it down to 12 V. But that's about 4-5 times more powerful than it needs to be.

Is that the new "down under" math, Chris? 32 * 2 = 55, lol! :wink: BTW, what are you using for a DC/DC converter? I haven't found much available that works with HV packs. Haha - typo. I must have tried to put 22 km there and got 32 km. Either way, the 55 km bit is correct :) I don't have a DC/DC co...

I figure it's about time I shared the Prelude battery pack. This battery pack sits in the fuel tank space and has six 12s10p liquid-cooled modules in series. The conversion needs two more modules up the front to make a standard 355 V nominal pack with 24 kWh of useful energy. This rear battery store...

I haven't posted here for a while, but I thought I would mention the range on Voltron. On Sunday the AEVA was at the Mundaring Blue Sky Festival - a street market with various offerings. Since this was about 32 km away in the hills, I decided to get a temporary permit and ride it to the fair. I was ...

Because the Hunter Valley looks similarly pristine?

Now, I'm no geologist or cartographer, but on that google maps screenshot, the wind farm seems to occupy a hilly outcrop that doesn't look like it was even suitable for agriculture, let alone building on. But wind turbines work well on elevated areas like this. So, how can it be argued that wind tu...

AussieRider wrote: ↑

Mar 16 2019 7:21am

Surely the stealthiest e-bike job this side of the Tour De France!

liveforphysics wrote: ↑

Mar 14 2019 5:53pm

Evidently they were only running 10sec behind motoGP laptimes, and this was the first time they had practiced the bikes on that track. That's so incredible it should be making history over the news of the fire, but the media is what it is.

Man bites dog stuff, really.

http://emotomag.com/late-night-fire-des ... MQ3AFfCX2s



So sad - before the series even turned a wheel

.... Snowtown occupies 0.29 km2 and has a nameplate capacity of 370 MW. So a 1 GW wind farm will occupy about 1 km2. It's got a solid 40% CF, so lets be generous and call it 3 km2. And also states that the "swept area" of the farms turbines is ...0.29 km2 !!! :shock: Coincidence ?? Yeah that's what...

A friend had a similar problem - turned out to be a corroded MC4 connector. Easy fix. Oh - Beastie, you might want to update your stupid meme. Most windfarms have better power density than that. Snowtown occupies 0.29 km2 and has a nameplate capacity of 370 MW. So a 1 GW wind farm will occupy about ...

Yes I agree there is more to it. I should also point out that my panels are used panels (about 6 years old) so they won't be delivering as much as brand new panels.

I'd say most of that is due to the angle of the panels - 30 degrees is steep for that latitude. It will probably produce better power in winter (which is when you need it anyway).

First time poster in this thread - El Nino in Australia = drought. La Nina in Australia = rain. The Southern Oscillation Index, or SOI is our best long-range predictor for rainfall on the east coast - it looks at mean atmospheric pressure differences between Tahiti and Darwin. And we're well and tru...

You tell me... 12 panels, facing north (Southern hemiphere) 25/30 deg angle. Nominal (nameplate) capacity 3.1 kW Output 6.5-7.0 kWh per day max,..mid summer, clear bright 100% sun exposure. Max power at noon, 1.4 kW :( 8) Sounds about right - the 25/30 degree angle is ideal for winter production. I...

SlowCo wrote: ↑

Mar 10 2019 4:12am

Funny how this thread derailed immediately to discus the use of a "sprotor" instead of focusing on the really interesting parts...
I want to learn more about the design of the frames, which motors, controllers and battery packs are used.

Ask Farfle

"How will we ever pay for all this?" From taxes. The same way we pay for everything of public significance. Like the military. In fact if you took money out of military spending and put it towards securing low emission, import-free energy (solar, wind, hydro, nuclear) you won't have as many enemies,...

Punx0r wrote: ↑

Mar 02 2019 5:04am

Seems like an opportunity for a third party to offer aftetlrmarket refurbished packs...

That's what I'm doing this autumn. Hope to fit 35 kWh into it without confusing the computers too much.

Always maintained the best thing you can do by the environment is walk places.

Where did you hear this? I don't think they would shut down all sales stores that doesn't make sense. Some people need to see a real car in person first. https://www.tesla.com/en_AU/blog/35000-tesla-model-3-available-now?redirect=no "To achieve these prices while remaining financially sustainable, ...