Search found 2688 matches

by weber
Sat, 31 Aug 2019, 10:10
Forum: General EV Discussion
Topic: How to tell a kilowatt hour from a kelvin week henry
Replies: 30
Views: 3015

Re: How to tell a kilowatt hour from a kelvin week henry

I deliberately didn't get into the finer points of presentation in the original post above, like the space between the number and the unit symbol. I wanted to keep it as simple as possible while addressing the things that actually alter the meaning , namely using the wrong case, adding "s" for plura...
by weber
Sat, 31 Aug 2019, 08:36
Forum: General EV Discussion
Topic: How to tell a kilowatt hour from a kelvin week henry
Replies: 30
Views: 3015

Re: How to tell a kilowatt hour from a kelvin week henry

Hi 4springs. I applaud your use of megametres (Mm) to give rounded odometer readings, and I encourage everyone to do so. I say "rounded" because I wouldn't want to see decimal fractional parts of megametres like 123.456 Mm. That would be better written as 123 456 km. Part of the reason the entire Au...
by weber
Fri, 30 Aug 2019, 16:54
Forum: Renewable Energy and Storage (Non-EV)
Topic: PIP inverter repairs and hardware modifications
Replies: 450
Views: 28735

Re: PIP-4048MS and PIP-5048MS inverters

Hi all, I was hoping someone would be able to provide me with the value of capacitors C152 - C162 in a PIP-4048MS (C152 in Coulombs partial schematic on page 71 of this thread dated Thu, 13 Jul 2017, 21:17) as I managed to damage one of mine while cleaning the pcb during repairs and my old eyes don...
by weber
Fri, 30 Aug 2019, 07:12
Forum: General EV Discussion
Topic: How to tell a kilowatt hour from a kelvin week henry
Replies: 30
Views: 3015

Re: How to tell a kilowatt hour from a kelvin week henry

I'm a complete nerd so I love this post. Especially Claude Litre :D You learn something new every day! Thanks Chuq. :) And don't forget, next time someone writes that they have a "144 v battery", you can reply: So it only stores 144 vreebles — the amount of heat it takes to raise one blintz of halv...
by weber
Fri, 30 Aug 2019, 07:01
Forum: General EV Discussion
Topic: How to tell a kilowatt hour from a kelvin week henry
Replies: 30
Views: 3015

Re: How to tell a kilowatt hour from a kelvin week henry

I stopped correcting Giles on RenewEconomy whenever I would read about a '100 MW battery'. It got to be tiresome. What's wrong with "100 MW battery"? It's spelled correctly, and batteries do have power limits as well as energy capacities. Particularly large battery modules that include management s...
by weber
Thu, 29 Aug 2019, 18:42
Forum: General EV Discussion
Topic: How to tell a kilowatt hour from a kelvin week henry
Replies: 30
Views: 3015

How to tell a kilowatt hour from a kelvin week henry

... or a nanometre from a nautical mile. This is about correct spelling of the symbols for units of measurement. I expect some of you will think this is mere pedantry, but please bear with me, particularly if you'd like your writing to appear more professional, or if you simply want to be respectful...
by weber
Wed, 28 Aug 2019, 17:15
Forum: Renewable Energy and Storage (Non-EV)
Topic: PIP-4048MS and PIP-5048MS inverters
Replies: 2566
Views: 538160

Re: PIP-4048MS and PIP-5048MS inverters

Given MPP Australia only sell non patchable buggy models and given that I have just had my first 4048MS rubbish clone die, where can I safely buy a good PIP 48/60 volt / equivalent firmware updateable inverter or three? I didn't realise there was such a thing as "MPP Solar Australia". https://mppso...
by weber
Wed, 28 Aug 2019, 16:49
Forum: Nissan
Topic: Home charging
Replies: 32
Views: 2182

Re: Home charging

But on that note I find it interesting that in order to run a 2.4kw (10a) device you need to run wiring capable of 20a. That is true, in the case of EV charging with a portable EVSE. Almost as if the wiring code was skimping all along and only now needs to be upgraded because of EVs. Not at all! Be...
by weber
Wed, 28 Aug 2019, 13:44
Forum: Nissan
Topic: Home charging
Replies: 32
Views: 2182

Re: Home charging

In terms of the wire size, this article https://reneweconomy.com.au/new-rules-to-increase-cost-of-ev-charger-installs-in-australia-nz-86060/ Is where I read it. What they say is for a 15a circuit (which is normally on a 15a breaker with 2.5mm wire) to be used as a EV charge point it should have cab...
by weber
Wed, 28 Aug 2019, 13:12
Forum: Batteries, charging, management and monitoring
Topic: HELP PLEASE I think I killed my cells
Replies: 28
Views: 2109

Re: HELP PLEASE I think I killed my cells

Okay so I’ve got a few random lead acid chargers humming away, it’s interesting that they are all dealing with the low voltage differently. All cheap simple chargers, but one is doing short pulses of 4 amps, ones doing longer pulses of 4.5, and another is just sitting at 2.5amps So what happened to...
by weber
Wed, 28 Aug 2019, 12:44
Forum: Nissan
Topic: Home charging
Replies: 32
Views: 2182

Re: Home charging

I was under the impression that all 15a sockets had to be on their own breaker wiring Whether that's required or not, depends on the "diversity factor" of the loads to be connected to those 15 A sockets. However all sockets used for charging EVs must be on their own breaker, because, unlike househo...
by weber
Tue, 27 Aug 2019, 14:22
Forum: Technical and conversion discussion
Topic: Prelude conversion project - some questions
Replies: 556
Views: 47019

Re: Prelude conversion project - some questions

You can increase the resolution of the ADC by adding the values and keeping a total. For example if you read the ADC 4 times you will be adding 2 bits to the ADC resolution. This is assuming you have some noise in your input which is higher than 1 bit. That's not quite right. The rule for dithering...
by weber
Tue, 27 Aug 2019, 13:40
Forum: Batteries, charging, management and monitoring
Topic: HELP PLEASE I think I killed my cells
Replies: 28
Views: 2109

Re: HELP PLEASE I think I killed my cells

Iamsam wrote:
Mon, 26 Aug 2019, 18:45
I was just originally hoping to find one that could put out high voltages, but I can only find massive pro ones for squillions of dollars
Yes. Sorry. I should have told you that in response to your original post.
by weber
Tue, 27 Aug 2019, 13:38
Forum: Nissan
Topic: Home charging
Replies: 32
Views: 2182

Re: Home charging

Part of the issue for me is that they DON'T provide a wall to vehicle EVSE only a type 2 to type 2. I wouldn't be having this discussion except i have to choose between a $500-600 dollar cable or a $900 plus installation wall charger. So the gap is reduced by Nissans choice of cable they supply. ma...
by weber
Tue, 27 Aug 2019, 12:43
Forum: Nissan
Topic: Home charging
Replies: 32
Views: 2182

Re: Home charging

Bryce, can you point me to where, in the Nissan Leaf Owner's Manual, it says the supplied EVSE is only for emergency charging? Here's what I find in the printed manual that came with my wife's 2012 Nissan Leaf, page CH-6: "Normal charging is performed using an 110-240 volt dedicated electrical outle...
by weber
Tue, 27 Aug 2019, 12:27
Forum: Nissan
Topic: Home charging
Replies: 32
Views: 2182

Re: Home charging

Bryce, what do those photos have to do with a portable EVSE plugged directly into a 15 A IP63 outlet (or better)? All I see is a DIY plug, and an extension lead left out in the weather. Coulomb, the term "granny charger" is what people call a portable EVSE to make themselves feel better after they r...
by weber
Sun, 25 Aug 2019, 15:59
Forum: Batteries, charging, management and monitoring
Topic: HELP PLEASE I think I killed my cells
Replies: 28
Views: 2109

Re: HELP PLEASE I think I killed my cells

What about a lab power supply. Cheap enough Yeah. I expected to find a cheap one at Jaycar, and gave up when I didn't. But you're right. Here's a cheapie. https://www.catch.com.au/product/yescom-30v-5a-dc-power-supply-adjustable-dual-digital-variable-precision-lab-grade-2811628/?offer_id=15371148&g...
by weber
Sun, 25 Aug 2019, 06:08
Forum: Technical and conversion discussion
Topic: Prelude conversion project - some questions
Replies: 556
Views: 47019

Re: Prelude conversion project - some questions

Petie wrote:
Sat, 24 Aug 2019, 21:57
Hi friendws!
Before I joint the forum, I could view the drawings etc. attached to this blog now they are gone, I wonder why?
It says: You don't have the required permissions...
Welcome, Petie. Thanks for letting us know about this problem. It should be fixed now.
by weber
Sat, 24 Aug 2019, 15:35
Forum: Batteries, charging, management and monitoring
Topic: HELP PLEASE I think I killed my cells
Replies: 28
Views: 2109

Re: HELP PLEASE I think I killed my cells

Scratch that. It has hiccup-mode overcurrent protection. It doesn't simply current-limit.
Unfortunately the constant current version is way more expensive.
https://www.jaycar.com.au/40w-24v-1-67a ... y/p/MP3375
by weber
Sat, 24 Aug 2019, 15:28
Forum: Batteries, charging, management and monitoring
Topic: HELP PLEASE I think I killed my cells
Replies: 28
Views: 2109

Re: HELP PLEASE I think I killed my cells

If the charger was designed for lead-acid it will probably have a float stage, and therefore work fine with the floodlight trick. But if it was designed for lithium-ion, that trick probably won't work, because they typically just stop charging when they think the battery is full. Another reason the ...
by weber
Fri, 23 Aug 2019, 18:47
Forum: Batteries, charging, management and monitoring
Topic: HELP PLEASE I think I killed my cells
Replies: 28
Views: 2109

Re: HELP PLEASE I think I killed my cells

Sam, I think you are wise to want to charge it at only 0.5 A. I assume you've heard about the dangers of "copper dendrites". When a lithium ion battery has been sitting at less than 2.0 volts, the copper current-collectors start to dissolve in the electrolyte. If you recharge after that, the copper ...
by weber
Tue, 20 Aug 2019, 09:15
Forum: Nissan
Topic: Climate control mod to turn off heater
Replies: 4
Views: 668

Re: Climate control mod to turn off heater

Top marks for actually posting about it, Coulomb. But man! That's ugly. :) And I don't understand why you think you need the extra two resistors. I've been sitting on the photo below for the 6 weeks since you watched me do it (for my wife's Leaf), and I gave you the parts to do yours. It works just ...
by weber
Thu, 08 Aug 2019, 08:06
Forum: Renewable Energy and Storage (Non-EV)
Topic: Nickel Iron Batteries real data
Replies: 34
Views: 2101

Re: Nickel Iron Batteries real data

The lithium ion is smaller, and presumably more mobile than potassium ions, but if that's the case, why then not use entirely LiOH? Cost perhaps? Diminishing returns? I believe the reason is diminishing returns, not cost. Yes the bare lithium ion is smaller, but a funny thing happens in solution. T...
by weber
Wed, 07 Aug 2019, 14:44
Forum: Renewable Energy and Storage (Non-EV)
Topic: Nickel Iron Batteries real data
Replies: 34
Views: 2101

Re: Nickel Iron Batteries real data

Yeah the LiOH is only an additive. Edison's patents mention 2% by weight. Here's a modern recipe: http://nickelcells.com/pdf/manuf/Taihang%20operation%20and%20maintenance%20NiFe%20battery.pdf It's 20 g of LiOH and either 333 g or 313 g (it's hard to tell which) of KOH per litre (998 g) of distilled ...
by weber
Wed, 07 Aug 2019, 11:27
Forum: Admin Notices
Topic: Forum search fixed
Replies: 0
Views: 782

Forum search fixed

If you've given up on using the AEVA forum's search facility, because you've been told waaay too many times: The following words in your search query were ignored because they are too common words: or Each word must consist of at least 3 characters and must not contain more than 14 characters exclud...