Search found 2600 matches

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: 680

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: 2286

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: 3898

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: 1738

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: 1738

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: 880

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: 1309

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: 907

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: 907

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: 907

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: 907

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: 907

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: 823

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: 604
Views: 56339

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: 789

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: 604
Views: 56339

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
by antiscab
Mon, 11 Nov 2019, 12:29
Forum: Technical and conversion discussion
Topic: Prelude conversion project - some questions
Replies: 604
Views: 56339

Re: Prelude conversion project - some questions

Hence i need a 0.5 second delay between the master precharge relay and the master contactor closing, Is 0.5 seconds enough? I use a 60W light bulb for manual pre-charging a Vectrix, and 0.5 seconds is borderline in that application. that's with ceramic caps with nearly no capacitance too, although ...
by antiscab
Sun, 10 Nov 2019, 12:14
Forum: Technical and conversion discussion
Topic: Prelude conversion project - some questions
Replies: 604
Views: 56339

Re: Prelude conversion project - some questions

I had a look through the stock cupboard and unfortunately we only have a 24v contactor with the aux leads. Maybe a voltage booster board to power the contactor if you system is all 12v? I wonder if the hold voltage is 12v or below if so, a cap and a double pole relay could be built cheaply and reli...
by antiscab
Sun, 10 Nov 2019, 12:09
Forum: Mitsubishi
Topic: No more i-miev's
Replies: 26
Views: 2484

Re: No more i-miev's

So, if you intended to keep the EV beyond the 10yr life expectancy of the X pack, the Z pack would be the better choice because the range was better as well as the total expected service life. That's the strategy I'm going for with the Zoe likely that's also the strategy the major manufacturers are...
by antiscab
Sun, 03 Nov 2019, 22:51
Forum: Technical and conversion discussion
Topic: Prelude conversion project - some questions
Replies: 604
Views: 56339

Re: Prelude conversion project - some questions

I wonder what the continuous draw would be from keeping everything powered up all the time
by antiscab
Thu, 31 Oct 2019, 07:03
Forum: Renewable Energy and Storage (Non-EV)
Topic: Storing energy
Replies: 13
Views: 1090

Re: Storing energy

Richo wrote:
Wed, 30 Oct 2019, 13:04
Compressed air...
If the energy surplus were in winter, that would work out pretty well. Get heat in winter when storing and cold in summer when releasing.
by antiscab
Wed, 30 Oct 2019, 09:26
Forum: Vectrix
Topic: Telltale lights
Replies: 9
Views: 1046

Re: Telltale lights

I still had 5 bars of battery left at the time (like >138V?) and the light came on at the bottom of the hill after coasting down, before the significant climb back up the other side. Where would the low voltage come from if the bike had been essentially at idle for >1min? Where the charger is prese...
by antiscab
Wed, 30 Oct 2019, 00:14
Forum: Vectrix
Topic: Telltale lights
Replies: 9
Views: 1046

Re: Telltale lights

oh, maintenance light usually means a glitch in the CAN bus, or even the motor position sensor for that sort of thing, unless something stops working, don't worry about it Error codes aren't stored anywhere. If you're keen to find out what the error is, the only way is to ride around with a laptop c...