Search found 564 matches

by 4Springs
Mon, 22 Apr 2019, 06:59
Forum: Renewable Energy and Storage (Non-EV)
Topic: Low Cost BMS for Home Storage Batteries
Replies: 61
Views: 5988

Re: Low Cost BMS for Home Storage Batteries

The Master board had a few bugs to iron out. I'm really glad I got some made to test. At first it just would not program. Many wrong paths later, I figured out that I'd ordered the wrong chip! I'd ordered the PIC16LF1847, instead of the PIC16F1847. This may have been deliberate on my part (I can't r...
by 4Springs
Mon, 22 Apr 2019, 06:41
Forum: Renewable Energy and Storage (Non-EV)
Topic: Low Cost BMS for Home Storage Batteries
Replies: 61
Views: 5988

Re: Low Cost BMS for Home Storage Batteries

Ok, in writing the above posts I realised that I really should get some boards to test. They are not too expensive to get just a few made, so I ordered the minimum quantity (I went through Seeed ( https://www.seeedstudio.com/fusion.html ), which I have used before). So here are the boards! IMG_20190...
by 4Springs
Wed, 03 Apr 2019, 13:51
Forum: Technical and conversion discussion
Topic: Hot rod EV - looking for advice.
Replies: 41
Views: 2256

Re: Hot rod EV - looking for advice.

One thing I'm struggling to find is a diagram or description of how the EV setup works, power in -> various boxes, cables and batteries -> electric motor -> differential -> wheels. What happens in the middle? There isn't very much to it when looking at it from a high level. Cells have positive and ...
by 4Springs
Tue, 02 Apr 2019, 18:30
Forum: General EV Discussion
Topic: EVs available in Australia (list)
Replies: 26
Views: 3065

Re: EVs available in Australia (list)

Email from Motors in Hobart re Kona: We’ve been notified that Kona EV’s have now hit the shore and we should have a vehicle to test drive from Monday – ish onwards! Pricing has also been launched, drive away price including 12 months registration as below: Elite $65256 Highlander $69936 Highlander T...
by 4Springs
Tue, 02 Apr 2019, 18:20
Forum: Technical and conversion discussion
Topic: Hot rod EV - looking for advice.
Replies: 41
Views: 2256

Re: Hot rod EV - looking for advice.

Hi blwnhr, and welcome! That is some machine. It certainly has potential, and your 5-7 years sounds realistic! The battery and motor/controller are definitely the most pricey parts of a conversion, and they do change with the times. Unfortunately they are also the hardest to leave until last, since ...
by 4Springs
Tue, 05 Mar 2019, 16:55
Forum: Batteries, charging, management and monitoring
Topic: E63 LG 63Ah NCM battery group buy
Replies: 32
Views: 2353

Re: E63 LG 63Ah NCM battery group buy

rutuja wrote:
Tue, 05 Mar 2019, 14:37
An excessive number of different activities in a hurry...
We appear to have some kind of re-posting bot here? Interesting...
by 4Springs
Fri, 22 Feb 2019, 13:45
Forum: Batteries, charging, management and monitoring
Topic: E63 LG 63Ah NCM battery group buy
Replies: 32
Views: 2353

Re: E63 LG 63Ah NCM battery group buy

Mmmmm.... If I've done my sums right, a 150V 37kWh pack would cost about $10k (AUD). It would weigh about 160kg without the mounting hardware. That's 166 cells. I'd decrease the weight of my vehicle and increase the range to about 150km. I might be in the market for a new battery soon, and this is v...
by 4Springs
Mon, 11 Feb 2019, 14:08
Forum: Hyundai
Topic: Hyundai Australia Kona EV info
Replies: 113
Views: 18687

Re: Hyundai Australia Kona EV info

reecho wrote:
Sun, 27 Jan 2019, 21:31
According to a dealer in Melbourne pre orders have started.
Are they ordering the tow kit?
by 4Springs
Mon, 11 Feb 2019, 14:06
Forum: General EV Discussion
Topic: Highway travelling at slower speeds
Replies: 5
Views: 702

Re: Highway travelling at slower speeds

I'd echo everyone else here. We travelled on that road up to Canberra last year. As I was driving I was thinking about the trip that you are thinking of undertaking. There are just so many vehicles! Even something going 90kph slows the whole four lanes down, as the cars from the left lane move over ...
by 4Springs
Sat, 02 Feb 2019, 17:48
Forum: For Sale/Wanted
Topic: BMW i3 Rex wreck (sold)
Replies: 11
Views: 1409

Re: BMW i3 Rex wreck

Location?
by 4Springs
Tue, 29 Jan 2019, 13:55
Forum: Renewable Energy and Storage (Non-EV)
Topic: Low Cost BMS for Home Storage Batteries
Replies: 61
Views: 5988

Re: Low Cost BMS for Home Storage Batteries

I guess the circuitry difference between top-balancing and bottom-balancing is too great to be able to include both and switch between the two? No difference in hardware, the difference between top and bottom balancing is all in the software. Nevilleh's original BMS was setup for bottom balancing, ...
by 4Springs
Sun, 27 Jan 2019, 15:03
Forum: Renewable Energy and Storage (Non-EV)
Topic: Low Cost BMS for Home Storage Batteries
Replies: 61
Views: 5988

Re: Low Cost BMS for Home Storage Batteries

Good news! 10 people have decided to jump in on the order for these boards, meaning over 200 of the celltop module boards to manufacture. This has dropped the unit price dramatically. So dramatically that it has now become economical to get some of the components pre-assembled. The new prices are: M...
by 4Springs
Sat, 26 Jan 2019, 12:28
Forum: Renewable Energy and Storage (Non-EV)
Topic: Low Cost BMS for Home Storage Batteries
Replies: 61
Views: 5988

Re: Low Cost BMS for Home Storage Batteries

200mA is ok for a small capacity cell but wouldn't do much for a 200Ah or 400Ah cell. This is the real difference in balancing house battery cells against EV battery cells, the house battery is big capacity but low voltage and top balanced rather than bottom balanced. Thanks Terry, you've given me ...
by 4Springs
Thu, 24 Jan 2019, 17:23
Forum: Batteries, charging, management and monitoring
Topic: Two chargers blow simultaneously.
Replies: 17
Views: 1040

Re: Two chargers blow simultaneously.

Interesting coulomb - are you suggesting that TC chargers don't come with the Enable / voltage divider option any more? This seems to be the case, yes. I left room in my vehicle for a third(!) charger, with the idea that I could hook up to 10, 15 or 30A supplies like Paul has done. The new chargers...
by 4Springs
Fri, 11 Jan 2019, 17:25
Forum: Holden/Chev Volt
Topic: Chevy Bolt motor / transaxle teardown
Replies: 3
Views: 1238

Re: Chevy Bolt motor / transaxle teardown

jonescg wrote:
Wed, 09 Jan 2019, 11:40
13 moving parts if you're generous.
I count each ball/roller in a bearing as a separate moving part...
by 4Springs
Sat, 05 Jan 2019, 17:50
Forum: General EV Discussion
Topic: Question for battery experts: proper inverter?
Replies: 4
Views: 869

Re: Question for battery experts: proper inverter?

will a 200w inverter provide enough power to run the apap w/o humidifier? It would help if you could find the power rating on the device. Or even better, measure how much current it draws when operational. You can get 12V cpap machines, which would be more efficient and probably draw less power. Mi...
by 4Springs
Wed, 28 Nov 2018, 17:16
Forum: Other
Topic: When someone asks "But show me an EV that can tow a boat to Broome!" Show them this...
Replies: 8
Views: 1457

Re: When someone asks "But show me an EV that can tow a boat to Broome!" Show them this...

The specs say:
Trailer Weight Rating (lbs): 5000kg
I'm guessing it actually means 5000lbs, or 2267kg. Even this is a very good towing capacity.
And 330 litres in the froot!
And AC power outlets!
by 4Springs
Mon, 26 Nov 2018, 18:17
Forum: Renewable Energy and Storage (Non-EV)
Topic: Low Cost BMS for Home Storage Batteries
Replies: 61
Views: 5988

Re: Low Cost BMS for Home Storage Batteries

Hi, I am interested. I have my old Imiev battery, but I need to find a compatible Grid connect inverter/charger. I looked at the Schneider, but they do not recommend Lithium Ion batteries with their chargers when grid connected. (But OK if charging direct off the panels, which is not how my system ...
by 4Springs
Sun, 25 Nov 2018, 12:59
Forum: Renewable Energy and Storage (Non-EV)
Topic: Low Cost BMS for Home Storage Batteries
Replies: 61
Views: 5988

Re: Low Cost BMS for Home Storage Batteries

Ok, I've finally got around to pricing these. The master module will be about $100 including the board (about $20) and all components. You need one of these - or two if you want a spare. The cell-top module will be about $6 each including the board (about $2) and all components. You need one of thes...
by 4Springs
Thu, 22 Nov 2018, 12:06
Forum: General EV Discussion
Topic: Bring on the BERM please
Replies: 30
Views: 3116

Re: Bring on the BERM please

Just a postscript on catcher for Ryobi 480e. There's this video showing that a grass catcher is actually available (in US at least): Ryobi RM480e Bagger Attachment with Blade Swap https://www.youtube.com/watch?v=SI4SiwKHLqg Thanks for that. Now I look, it even says that the 'bagger' is available on...
by 4Springs
Thu, 22 Nov 2018, 07:11
Forum: General EV Discussion
Topic: Bring on the BERM please
Replies: 30
Views: 3116

Re: Bring on the BERM please

brendon_m wrote:
Thu, 22 Nov 2018, 06:55
4 x 75ah 48v included. For $3999usd ($5500aud). Seems too cheap to have a mower bolted around it
You mean the Ryobi? It is lead-acid. Gives better traction!
by 4Springs
Thu, 22 Nov 2018, 06:43
Forum: General EV Discussion
Topic: Bring on the BERM please
Replies: 30
Views: 3116

Re: Bring on the BERM please

Been waiting for an electric ride-on, keeping our ageing petrol one going for 'just one more season' for the last few years.
Would like a catcher, but otherwise that Ryobi looks good.
by 4Springs
Tue, 20 Nov 2018, 17:54
Forum: General EV Discussion
Topic: Numberplate ID for EV and Hydrogen Vehicles
Replies: 11
Views: 1220

Re: Numberplate ID for EV and Hydrogen Vehicles

Interesting. We have no such licence plate stickers in Tasmania. I was recently informed by an emergency services guy that he thought it was crucial. His point was that if a car has 'stopped' (i.e. no noise from the engine bay), an emergency services person doesn't expect it to go again. If I suffer...
by 4Springs
Mon, 19 Nov 2018, 18:51
Forum: Technical and conversion discussion
Topic: Prelude conversion project - some questions
Replies: 475
Views: 32751

Re: Prelude conversion project - some questions

Controller info in this post.
viewtopic.php?f=18&t=5249#p64990
There are simpler controllers around if you just run the thing flat out.
by 4Springs
Sun, 18 Nov 2018, 09:03
Forum: Renewable Energy and Storage (Non-EV)
Topic: Low Cost BMS for Home Storage Batteries
Replies: 61
Views: 5988

Re: Low Cost BMS for Home Storage Batteries

Have you thought about making the board shorter but wider with all the components mounted to either the positive end or the negative end, then a cable to connect to the other terminal? That way the board would fit between the terminal and vent and the cable would go around the vent and make the mod...