From my understanding he designs electronics and the eV stuff then get sold through evworks.
No workshop etc to visit as such of his - other than evworks.
I did have his number on my phone before it died.
Is there something you need designing?
I'm in welshpool.
Search found 3388 matches
- Tue, 19 Feb 2019, 12:23
- Forum: Parts & Suppliers
- Topic: ZEVA
- Replies: 7
- Views: 92
- Mon, 18 Feb 2019, 12:54
- Forum: Scooters, mopeds and electric toys
- Topic: Importing Electric kick scooters
- Replies: 2
- Views: 46
Re: Importing Electric kick scooters
Segway get through as they are classified as off-road use only and now for approved specialised tour groups. The other issue is even if you get them in once you pay for EMC plus safety certs to be able to sell them you'd need to sell a lot to even break even. Its an endless on going problem https://...
- Fri, 15 Feb 2019, 12:55
- Forum: Technical and conversion discussion
- Topic: Lead acid to lithium conversion
- Replies: 38
- Views: 535
Re: Lead acid to lithium conversion
The flyback diode goes on the 12V side of the contactor. The controller should have motor protection on the HV side. Even less requirements to add something for 3-phase design. Normally it's not a TVS diode anyway. Just a rectifier diode pointing from -HV to +HV. Something like an APT60S20BG would p...
- Thu, 14 Feb 2019, 13:01
- Forum: Technical and conversion discussion
- Topic: Lead acid to lithium conversion
- Replies: 38
- Views: 535
Re: Lead acid to lithium conversion
Hmmm 15..16..
- Thu, 14 Feb 2019, 12:59
- Forum: Technical and conversion discussion
- Topic: Lead acid to lithium conversion
- Replies: 38
- Views: 535
Re: Lead acid to lithium conversion
Looks like the Delta-Q 48V charger can put out up to 72V, question is how much voltage the lithium profile is set to (hoping around 53V). Not sure if the charger will let me run it without a battery attached to find out, and I'm not getting any response from their support which is frustrating... In...
- Wed, 13 Feb 2019, 12:41
- Forum: Technical and conversion discussion
- Topic: Lead acid to lithium conversion
- Replies: 38
- Views: 535
Re: Lead acid to lithium conversion
I wasn't planning to mess with the Sevcon, plan was to pop in 15 or 16 LiFePO4 cells, Zeva BMS, Zeva screen, load new charge profile in Delta-Q and call it a day. Sounds like a fairly reasonable plan given all the options. Glad you pointed out the 57V controller limit, Don't forget these are user a...
- Tue, 12 Feb 2019, 13:03
- Forum: Technical and conversion discussion
- Topic: Lead acid to lithium conversion
- Replies: 38
- Views: 535
Re: Lead acid to lithium conversion
So are you ditching the 12V LiFePO4 idea? Given we know now that your charger is adjustable. and the controller is adjustable (with programmer). and a BMS is likely... There is no need even to stay with LiFePO4. The only reason I suggested it was because this would have been a drop in replacement wi...
- Tue, 12 Feb 2019, 12:38
- Forum: Technical and conversion discussion
- Topic: Lead acid to lithium conversion
- Replies: 38
- Views: 535
Re: Lead acid to lithium conversion
The CA100 has an internal resistance of <0.6mR.
So at 200A the loss/sag will be 0.12V.
or less than 2V for the whole pack.
So at 200A the loss/sag will be 0.12V.
or less than 2V for the whole pack.
- Mon, 11 Feb 2019, 14:45
- Forum: Technical and conversion discussion
- Topic: Lead acid to lithium conversion
- Replies: 38
- Views: 535
Re: Lead acid to lithium conversion
$8,500 for one with new batteries.
https://www.truckworld.com.au/search/a~ ... =v~1-z~15-
The specs say it had a 500A controller.
Do you know what model of controller it has now?
https://www.truckworld.com.au/search/a~ ... =v~1-z~15-
The specs say it had a 500A controller.
Do you know what model of controller it has now?
- Mon, 11 Feb 2019, 12:44
- Forum: Technical and conversion discussion
- Topic: Lead acid to lithium conversion
- Replies: 38
- Views: 535
Re: Lead acid to lithium conversion
Generally 12v lithium batteries with internal bms can't be put in series, unless rated to do so. The issue is they tend to use semiconductor based switching devices, which don't have much voltage headroom. True. But they would be referenced to the pack it's on. The issue will be when the BMS detect...
- Mon, 11 Feb 2019, 12:36
- Forum: Technical and conversion discussion
- Topic: Lead acid to lithium conversion
- Replies: 38
- Views: 535
Re: Lead acid to lithium conversion
Actually the ev works 12V90Ah doesn't have internal BMS. They are matched cells. I don't see why these can't be serialised... How about a simple Zener+resistor overvoltage shunt? The controller should do the low voltage shutdown. A simple voltage gauge on each cell just to proove they are not out of...
- Fri, 08 Feb 2019, 13:17
- Forum: Technical and conversion discussion
- Topic: Lead acid to lithium conversion
- Replies: 38
- Views: 535
Re: Lead acid to lithium conversion
I believe it has a Sevcon controller, and the motor would probably top out at around 200-300A if I was going flat out up a hill. The Trojans don't have a CCA rating and the max output claimed is <250A. So I'd suspect that they really were never up to the job anyway. The 48V sevcon controllers typic...
- Fri, 08 Feb 2019, 12:55
- Forum: Technical and conversion discussion
- Topic: Lead acid to lithium conversion
- Replies: 38
- Views: 535
Re: Lead acid to lithium conversion
Sorry if it is borderline why bother with BMS or CAN? I'd keep everything the same/simple and go with a 12V block with the internal BMS. How many 3.2V cells should I get? 15 to make exactly 48V, or 16 cells to make 51.2V which is closer to what the lead acid pack would be? 15cells x 3.2V = 48V nom 1...
- Fri, 08 Feb 2019, 12:28
- Forum: For Sale/Wanted
- Topic: Wanted: Used vehicle (formerly ICE converted to EV)
- Replies: 16
- Views: 983
- Thu, 07 Feb 2019, 12:54
- Forum: Technical and conversion discussion
- Topic: Lead acid to lithium conversion
- Replies: 38
- Views: 535
Re: Lead acid to lithium conversion
For compatibility LiFePO4 is the better option Do you actually flatten it in one day/trip? The 12V packs have no BMS. https://www.evworks.com.au/winston-battery-lp12v90ah-lifepo4-cell-12v-90ah But the full pack would need to be about 48V 200Ah to be eqv. So $4-5k does sound about right. Obviously if...
- Thu, 31 Jan 2019, 12:50
- Forum: Batteries, charging, management and monitoring
- Topic: Battery Modules Questions.
- Replies: 14
- Views: 292
Re: Battery Modules Questions.
I am considering the possibility of making standard battery modules that I could sell to people doing EV conversions. Nice in theory but the market is nowhere big enough to make this profitable. Also I doubt one size fits all as there are too many different cars with different mounts and different ...
- Wed, 30 Jan 2019, 12:47
- Forum: Technical and conversion discussion
- Topic: Prelude conversion project - some questions
- Replies: 172
- Views: 11406
Re: Prelude conversion project - some questions
Alternatively I could find some closed cell foam and stick that down... EVA would work but would really need to be a continuous piece. So you would have to buy a big sheet just to cut a wired skinny shape o-ring. ~$20 for 2200x1100. I think Clark rubber used to have it on rolls you could buy the me...
- Tue, 29 Jan 2019, 12:08
- Forum: The Lounge
- Topic: Solar Panel output: Rating versus Reality
- Replies: 38
- Views: 1413
Re: Solar Panel output: Rating versus Reality
Well I'm curious to test this for myself.
I have a variety of panels brands+sizes I can check.
I don't have any semi-flex ones tho.
I'll have an ask around to see if I can borrow some for testing...
I have a variety of panels brands+sizes I can check.
I don't have any semi-flex ones tho.
I'll have an ask around to see if I can borrow some for testing...
- Thu, 24 Jan 2019, 12:46
- Forum: Other
- Topic: YAEBU! (Yet Another Emax Battery Upgrade) project
- Replies: 6
- Views: 125
Re: YAEBU! (Yet Another Emax Battery Upgrade) project
10x 12.6V, 30Ah -"high power" Battery pack https://www.aliexpress.com/item/12V-30Ah-3S12P-11-1V-12-6V-High-power-Lithium-Battery-Pack-for-Inverter-Miner-Xenon/32923747867.html?spm=2114.search0604.3.1.2a69db83QDw7OU&ws_ab_test=searchweb0_0,searchweb201602_1_10065_10068_10130_10547_319_317_10548_1069...
- Thu, 24 Jan 2019, 12:39
- Forum: Other
- Topic: YAEBU! (Yet Another Emax Battery Upgrade) project
- Replies: 6
- Views: 125
Re: YAEBU! (Yet Another Emax Battery Upgrade) project
I don't know about the e-max but the similar scooter I have does fit 8 Leaf cells with a bit of modifying.
8 x 7.6 = 60.8V nom
But they're a bit harder to get these days
8 x 7.6 = 60.8V nom
But they're a bit harder to get these days

- Wed, 23 Jan 2019, 12:54
- Forum: The Lounge
- Topic: Solar Panel output: Rating versus Reality
- Replies: 38
- Views: 1413
Re: Solar Panel output: Rating versus Reality
The sly trick the solar industry has used for ever is to not give true output figures in a real world application. Except the bit where they try to comply with international standards IEC 60904. Not surprisingly there are massive PV testing machines for IEC 60904. :shock: 1000W/m2 25DegC. In Austra...
- Fri, 18 Jan 2019, 12:46
- Forum: For Sale/Wanted
- Topic: Wanted: Used vehicle (formerly ICE converted to EV)
- Replies: 16
- Views: 983
Re: Wanted: Used vehicle (formerly ICE converted to EV)
https://www.gumtree.com.au/s-ad/yarram/ ... 1204503883
$10k for "sparky" the electric getz done by Blade.
$10k for "sparky" the electric getz done by Blade.
- Fri, 18 Jan 2019, 12:38
- Forum: The Lounge
- Topic: Solar Panel output: Rating versus Reality
- Replies: 38
- Views: 1413
Re: Solar Panel output: Rating versus Reality
I know the percentage loss is for total power, not just the Vmp, so the math is vague at best, but you get the general idea. The graph for the 150W panel indicates the peak power output drops ~10% every 25DegC above 25DegC. On a clear sunny summer day in Australia if you can't take a panel from ins...
- Tue, 15 Jan 2019, 13:04
- Forum: EV Racing
- Topic: HP in EV vs HP in ICE
- Replies: 10
- Views: 578
Re: HP in EV vs HP in ICE
There may be some rules developed about how long the vehicle should run for. I can’t imagine an EV full of super caps that runs at well over the 2400hp of the V8, but can only accelerate for 10 seconds before needing a recharge would be considered in the spirit of the competition. At this stage I d...
- Mon, 14 Jan 2019, 13:01
- Forum: Electric motors and controllers
- Topic: Zero Turn Mower Conversion
- Replies: 2
- Views: 572
Re: Zero Turn Mower Conversion
Long time viewer first time poster?!?
Welcome John - even if it's 3 years late
Welcome John - even if it's 3 years late
