Search found 2482 matches

by antiscab
Today, 14:23
Forum: Mitsubishi
Topic: Any i-MiEV's for sale?
Replies: 3
Views: 33

Re: Any i-MiEV's for sale?

Josephs is in Perth (high mileage, but has a recent new battery). I think there are others too
by antiscab
Sun, 12 Jan 2020, 08:13
Forum: Tesla EVs
Topic: Hypermiling in a Model 3
Replies: 18
Views: 784

Re: Hypermiling in a Model 3

I’m not sure how you get great economy in a hybrid if you spend most of your time on long country driving (using the petrol engine) such as we do. By using an atkins cycle engine instead of an Otto. Atkins cycle is significantly more efficient, but has far lower peak power. Most of the fuel economy...
by antiscab
Thu, 09 Jan 2020, 17:23
Forum: Batteries, charging, management and monitoring
Topic: Arvio 3.5kWh drop-in-battery-replacement supercapacitor on sale
Replies: 378
Views: 55428

Re: Arvio 3.5kWh drop-in-battery-replacement supercapacitor on sale

Even real caps dry out after 10 - 15 years. Ceramics might get to 40 years, but they're far from energy dense
by antiscab
Wed, 08 Jan 2020, 09:00
Forum: Batteries, charging, management and monitoring
Topic: Arvio 3.5kWh drop-in-battery-replacement supercapacitor on sale
Replies: 378
Views: 55428

Re: Arvio 3.5kWh drop-in-battery-replacement supercapacitor on sale

Even with LTO cells, it will be a long time before any capacity loss is noticed.
by antiscab
Wed, 08 Jan 2020, 08:55
Forum: Renewable Energy and Storage (Non-EV)
Topic: lithium-sulfur batteries
Replies: 6
Views: 212

Re: lithium-sulfur batteries

Thundersky once put out a spec sheet for 600Ah lithium sulfur cells that weighed the same as current generation 200Ah lifepo4 cells. This was at least 6 years ago. They must not have got them to work, as it still has yet to enter production. It's the same old thing, until mere mortals can buy a batt...
by antiscab
Wed, 01 Jan 2020, 21:51
Forum: Renewable Energy and Storage (Non-EV)
Topic: Grid Tied Wind Turbine - Champion Lakes
Replies: 2
Views: 163

Re: Grid Tied Wind Turbine - Champion Lakes

Was this across the road from the aldi? The same place with the solar on trackers ?
by antiscab
Sun, 29 Dec 2019, 09:38
Forum: Renewable Energy and Storage (Non-EV)
Topic: Interworking a Sunny Island with a Redflow Flow battery
Replies: 10
Views: 352

Re: Interworking a Sunny Island with a Redflow Flow battery

But the three main issues for me in a static environment in the subtropics are cyclical degradation, heat derating and fire risk. So, as a thought experiment, what is the expected percentage deterioration for the various lithium chemistries when operating daily charge/discharge and operating in a 2...
by antiscab
Sat, 28 Dec 2019, 11:13
Forum: Renewable Energy and Storage (Non-EV)
Topic: Interworking a Sunny Island with a Redflow Flow battery
Replies: 10
Views: 352

Re: Interworking a Sunny Island with a Redflow Flow battery

My lifepo4 batteries turn 10 this year, still in daily use. Getting to 10 years isn't so hard now.

OP - compared to cost of a super cap, have you considered having a small buffer battery instead? 100Ah at 48v would cover it
by antiscab
Thu, 26 Dec 2019, 21:24
Forum: Charging Infrastructure
Topic: OpenEVSE Charging Station any Users?
Replies: 24
Views: 1138

Re: OpenEVSE Charging Station any Users?

The car should be interrupting the charge before the contactor opens. Contactors don't last long when switching under load
by antiscab
Fri, 13 Dec 2019, 21:23
Forum: For Sale/Wanted
Topic: Vectrix and assorted EV parts
Replies: 20
Views: 3118

Re: Vectrix and assorted EV parts

where are you located Pete?
Best bet at the moment would be a 3.3kw TC Charger. They fit in place of the original.

Downside it ends up being around $1k, and you have to slow it down when not using a 15A powerpoint
by antiscab
Wed, 27 Nov 2019, 23:14
Forum: Tesla EVs
Topic: That truck
Replies: 22
Views: 837

Re: That truck

With the reduced mass, you could go a step further and have a resettable crumple zone.
by antiscab
Wed, 27 Nov 2019, 21:54
Forum: Tesla EVs
Topic: That truck
Replies: 22
Views: 837

Re: That truck

What if the crumple zones are all internal? That way you only have to slow the deceleration of the passenger compartment rather than the whole vehicle.
by antiscab
Sat, 23 Nov 2019, 13:02
Forum: Parts & Suppliers
Topic: WA EV servicing
Replies: 4
Views: 487

WA EV servicing

Hi All, I came across this in my travels through gumtree: https://www.gumtree.com.au/s-ad/melville/mechanics-garages/free-labour-hybrid-and-ev-servicing/1221073501 Not that there's much to service on an EV, things like brakes and fluid do eventually need to be checked (maybe every second year) There...
by antiscab
Sun, 17 Nov 2019, 22:59
Forum: For Sale/Wanted
Topic: Vectrix VX1 Lithium for sale
Replies: 6
Views: 921

Re: Vectrix VX1 Lithium for sale

https://youtu.be/GERbQs1k9ic

That's the link to the conversion video
by antiscab
Sat, 16 Nov 2019, 19:03
Forum: Renewable Energy and Storage (Non-EV)
Topic: feeding DC into a PV grid connect inverter
Replies: 12
Views: 540

Re: feeding DC into a PV grid connect inverter

Couldn't just synchronise the gen set to the inverter and have it direct online?
by antiscab
Sat, 16 Nov 2019, 19:02
Forum: Renewable Energy and Storage (Non-EV)
Topic: feeding DC into a PV grid connect inverter
Replies: 12
Views: 540

Re: feeding DC into a PV grid connect inverter

It should work, though I wonder how the inverter will be with the ripple.

Only one way to find out
by antiscab
Sat, 16 Nov 2019, 14:00
Forum: Renewable Energy and Storage (Non-EV)
Topic: feeding DC into a PV grid connect inverter
Replies: 12
Views: 540

Re: feeding DC into a PV grid connect inverter

So you are telling me that the GCI works fine with source impedances lower than PVs ? I don't want to find out the hard way. All the ones I have tried have worked Make sure to pre-charge before connecting though how big a GCI are you thinking of? I would just use a cheap second hand one thats no lo...
by antiscab
Sat, 16 Nov 2019, 10:00
Forum: Renewable Energy and Storage (Non-EV)
Topic: feeding DC into a PV grid connect inverter
Replies: 12
Views: 540

Re: feeding DC into a PV grid connect inverter

What sort of DC voltages did you use ? I expect running to DC input current limit is one way of controlling things. I have used 140vdc and 320vdc you could use a modern GCI that supports export limiting, as another way of controlling things That would facilitate the use of a modest sized standalone...
by antiscab
Fri, 15 Nov 2019, 16:39
Forum: Renewable Energy and Storage (Non-EV)
Topic: feeding DC into a PV grid connect inverter
Replies: 12
Views: 540

Re: feeding DC into a PV grid connect inverter

It's worked every time I have tried connecting a battery to a normal grid tie inverter

The inverter starts at open circuit and just ramps up input current till it either finds MPPT or runs into it's current limit
by antiscab
Fri, 15 Nov 2019, 11:59
Forum: For Sale/Wanted
Topic: Ev parts
Replies: 6
Views: 473

Re: Ev parts

above 45 cells you get arcing at the brushes (ends up being around 130v) Some motor controllers allow you to set a motor voltage limit, allowing you to use a higher voltage pack max rpm is still a mechanical limit, starting at around 5500rpm when cold and falling when hot (the banding weakens with t...
by antiscab
Thu, 14 Nov 2019, 21:07
Forum: Technical and conversion discussion
Topic: Prelude conversion project - some questions
Replies: 535
Views: 41216

Re: Prelude conversion project - some questions

what about a second aircon compressor and condensor?
by antiscab
Thu, 14 Nov 2019, 21:05
Forum: General EV Discussion
Topic: DC Motor
Replies: 3
Views: 425

Re: DC Motor

It will be a trail and error thing I suspect

having said that, this is a low voltage high rpm motor.
Is the 6500rpm is just the max speed, not nominal speed at 48v and 216A?

is the motor series wound?

If not series wound, you are wasting your time trying to go higher voltage
by antiscab
Mon, 11 Nov 2019, 12:32
Forum: Technical and conversion discussion
Topic: Prelude conversion project - some questions
Replies: 535
Views: 41216

Re: Prelude conversion project - some questions

a smart pre-charger that only closes the master contactor when the voltage gets within a pre-determined level would also prevent welding situations where say the dc-dc is drawing more than normal on start up.
Fixed time pre-charging doesn't guarantee pre-charge unless everything is okay