AEVA Forums

Great to hear Damon. It was an epic conversion, not sure I'd have the confidence to tackle it, but after seeing your step by step conversion .... maybe I'd consider it or a similar transplant from a salvage vehicle for a retro build up. If everything moves from one vehicle to the other, theoreticall...

I was planning on using 0.8 mm thick FR4. I used to buy big sheets of it from Regal-Beloit in Welshpool, but I think they stopped selling it. Now you have to go through a wholesaler to buy it. I like FR4 because it's tough, strong and is like kryptonite to electricity. As for the buslinks, I don't ...

Good question... I was planning on getting some 2 mm copper busbars made up with enough cross-section for about 40 mm2. Unfortunately, one crappy little M4 screw hole is pretty ordinary contact, so I plan on putting a kink in the buslink just to the side of the screw hole to ensure some decent surf...

Yeah I fully expect any metal cased battery to be live to the case now. Rather disturbing the spec sheets mention nothing about this. I think the FR4 will work OK. Not ideal, but what can you do. What thickness FR4 are you using? After a few email discussions with Weber he mentioned another drop in...

I'm not sure if these are the same cells, But Jan from the Adelaide branch of the AEVA had his Prius burn to the ground after a short between a cell case and the chassis. I think it was actually the aluminium box he made to hold the cells in the wheel well of the Prius, but that was attached to the ...

Thanks for posting that, I often wondered what all the other settings were for after 29 because I couldn't seem to find any mention of them in the manual. Luckily they aren't part of the charging regime for lithium batteries so it didn't matter, but at least I know that 30 should be set at Eds so th...

I'd go with the PET sheet because it gives you electrical isolation as well. The aim is the keep the cells above 0*C when charging and I believe the PET sheet will not conduct the cold from outside the way the aluminium would and therefore provide a more even heat.

T1 Terry

Linked in series the open circuit voltage would be 248vdc, depends on the inverter but if it is a PiP MS inverter the open circuit limit is 145vdc. You could connect 2 of the 38v Voc panels in series plus one of the 48v Voc panels ( 124vdc Voc) and the other 3 panels the same, then connect both str...

The real drama we are having down this way this yrs is the Vmp drop due to the panel temps. 30vdc Vmp (STC) panels are dropping to 26vdc Vmp or lower around 11am until 4pm resulting in the batteries not reaching fully charged each day. Not so bad with lithium batteries, but the lead acid batteries o...

Linked in series the open circuit voltage would be 248vdc, depends on the inverter but if it is a PiP MS inverter the open circuit limit is 145vdc. You could connect 2 of the 38v Voc panels in series plus one of the 48v Voc panels ( 124vdc Voc) and the other 3 panels the same, then connect both stri...

Hi I have just bought through J spec a 2104 leaf azeo x with a battery that appears to test well with Leaf Spy, the interesting thing is that apart from the charging history being a bit odd for the kms it is a sub 20k kms car and I believe if Bens (who really is just as helpful as others say) numbe...

Clever move, maybe you can find someone who wants the rolling chassis EV powered to run around their property or as a number plate swap unit for one they had written off.

T1 Terry

Is the Jaycar stuff cheaper? I'm guessing from reading a few of the posts that they were the supplier

T1 Terry

Is that as good or better than this stuff and what about price? http://www.dynamat.com/automotive-and-transportation/automotive-restoration/dynamat-xtreme/ This is the stuff they swear by for sound deadening a VW Kombi, you know all about road noise when you own an early model one of these :lol: T1 ...

It that a smashed windscreen? Part of the engine & Transmission removal or prior to the job?

T1 Terry

As a matter of interest, what voltage is required for the current to increase to an amount that would be regarded a charging current, say above 1 amp or more? Once this threshold has been reached, if the voltage is again dialled back to 3.8v, is the current still only 1.5mA?

T1 Terry

If you can find a Prius traction battery at a wreckers, it isn't difficult to swap the cells around to increase the capacity while dropping the voltage. But you might be better off getting the cells from Matt because he will know what cells are worth the effort and which cells are just paper weights...

 "When the charging is disconnected and a few amp load connected across the cell, how long does it remain above 3.6v? Only a few [edit: tens of] seconds. But, as expected, after I disconnect the load (a headlight bulb) the voltage slowly rises above 3.6 V again." Sounds like a high internal resista...

@T1 Terry, It's possible that some old models of the EV Power CMUs started bypassing at a higher voltage, but the present-day specification clearly states that it starts bypassing at 3.5 V. But I agree that the present-day EV Power spec of not turning on the alarm until 4.0 V leaves much to be desi...

I guess the other upside is the reduced losses through the various transmissions when only requiring 2WD. Can the front axle be fitted with free wheeling hubs? Can you add a planetary gearset between the motors and diff? That would allow a very low ratio to be selected when 4WD crawling was required...

The units I linked to are the same as units I purchased some yrs back from one of the WA suppliers, not sure which at the moment. They most definitely don't start bypassing till the cell reaches 3.8v and stop bypassing at 3.6v. These units shift 5 amps with a cell voltage of 3.8v or higher and the h...

"I'll be very surprised if you can find any present-day BMS for LFP cells that bypasses at a voltage higher than 3.6 V. Please post a link to its specification. Otherwise, you're just battling straw men." https://www.ev-power.com.au/product/bms-cbm400/ see the heatsink on the negative terminal? Thes...

Have you thought about leaving the original gearbox etc intact and just replacing the ICE motor with a suitable electric motor? I seem to remember reading about someone having done something similar, but it might have been an overseas conversion.

T1 Terry

The flurocarbon coolants are extremely expensive and have to be kept in an airtight loop. They absorb water which makes them conductive. I was considering to use them for a cooling loop in a 3kv inverter. After funding out about the problems I decided that air cooling was good enough. Do you know i...

"Very interesting. I had to go search. I see they are fluorocarbons which are greenhouse gasses with long atmospheric lifetimes and very high global warming potential, e.g. GWP = 9000. I'd think very hard about whether you can't get away with using air as your coolant. Internal resistance of LTO is ...