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by Paul9
Sun, 10 May 2020, 08:34
Forum: Renewable Energy and Storage (Non-EV)
Topic: 12v lithium batteries can't be paralleled?
Replies: 20
Views: 378

Re: 12v lithium batteries can't be paralleled?

Thanks guys

Advice appreciated!

Paul
by Paul9
Fri, 08 May 2020, 19:56
Forum: Renewable Energy and Storage (Non-EV)
Topic: 12v lithium batteries can't be paralleled?
Replies: 20
Views: 378

Re: 12v lithium batteries can't be paralleled?

I just checked and it definitely says they can't be paralleled but it is ok to link two in series to give you 24 v.

Thanks guys for your replies.
Paul
by Paul9
Fri, 08 May 2020, 15:12
Forum: Renewable Energy and Storage (Non-EV)
Topic: 12v lithium batteries can't be paralleled?
Replies: 20
Views: 378

12v lithium batteries can't be paralleled?

Hi people, My brother wants to buy 2 or 3 12v lithium batteries about 100ah each with internal BMS for his camping trips. We were hunting around for suppliers and found a brand called Voltax but the website says they can't be used in parallel only in series. We found other brands but they do not men...
by Paul9
Sat, 14 Mar 2020, 12:00
Forum: Batteries, charging, management and monitoring
Topic: OK I'm confused!
Replies: 16
Views: 720

Re: OK I'm confused!

Ok people I am about to sort of hijack my own thread. Since I blew my first charger I have had an idea as to how chargers may be made more reliable. I always dismiss this idea until I blow my next charger and the idea resurfaces. It appears to me, from my own experience and comments made by other pe...
by Paul9
Fri, 13 Mar 2020, 09:48
Forum: Batteries, charging, management and monitoring
Topic: OK I'm confused!
Replies: 16
Views: 720

Re: OK I'm confused!

Thanks guys I have tried the new smaller Elcon chargers, Neither worked. In a previous thread back in August 2017 I listed some of the problems I had with the new Elcons. i quote it here so you don't have to go hunting for it: "First problem is that the connectors are 4 pin, pin and socket connector...
by Paul9
Thu, 12 Mar 2020, 20:35
Forum: Batteries, charging, management and monitoring
Topic: OK I'm confused!
Replies: 16
Views: 720

Re: OK I'm confused!

Thanks coulomb The chargers I use are KPS (KingPan) but it is not because they are the cheapest I could find. They are half the size and half the weight of the Elcon chargers of the same wattage. Size and weight are both important factors when fitting components into a small Suzuki Swift. The KPS ch...
by Paul9
Thu, 12 Mar 2020, 16:41
Forum: Batteries, charging, management and monitoring
Topic: OK I'm confused!
Replies: 16
Views: 720

Re: OK I'm confused!

Thanks guys I am starting to understand.
by Paul9
Thu, 12 Mar 2020, 14:58
Forum: Batteries, charging, management and monitoring
Topic: OK I'm confused!
Replies: 16
Views: 720

Re: OK I'm confused!

Ok guys I think I understand. It is not simply volts times amps equals watts? There is more to it than that?
by Paul9
Thu, 12 Mar 2020, 13:06
Forum: Batteries, charging, management and monitoring
Topic: OK I'm confused!
Replies: 16
Views: 720

Re: OK I'm confused!

By power factor I assume you mean the inefficiency of the charger. The charger normally sends 85 to 90% of the power it receives into the battery bank.

My confusion is with the readings on the power meter itself before the power even gets to the charger.
by Paul9
Thu, 12 Mar 2020, 11:49
Forum: Batteries, charging, management and monitoring
Topic: OK I'm confused!
Replies: 16
Views: 720

OK I'm confused!

Hi people, I have been charging with a new KPS 2000 charger which is fairly obviously a 2kw charger. 2kw divided by 240 volts means a roughly 8.33 amp draw. I then noticed my 10 amp extension lead was getting very hot. I bought a power meter and took some measurements. According to the power meter t...
by Paul9
Wed, 25 Sep 2019, 21:26
Forum: General EV Discussion
Topic: How to tell a kilowatt hour from a kelvin week henry
Replies: 34
Views: 3757

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

Thanks coulomb when writing my post I suspected I was "out" by a factor of a coupla billion!
by Paul9
Mon, 23 Sep 2019, 13:55
Forum: General EV Discussion
Topic: How to tell a kilowatt hour from a kelvin week henry
Replies: 34
Views: 3757

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

I can't be sure but I think, since converting to electric, my car has done 210 xenna nanometres?
by Paul9
Fri, 20 Sep 2019, 14:27
Forum: Batteries, charging, management and monitoring
Topic: Cooling chargers?
Replies: 10
Views: 1092

Re: Cooling chargers?

Thanks T1 Terry and Richo

Your suggestions have given me a few things to explore! I think I might sit down, grab a glass of red and think through this a bit more.

Regards
Paul
by Paul9
Fri, 20 Sep 2019, 09:12
Forum: Batteries, charging, management and monitoring
Topic: Cooling chargers?
Replies: 10
Views: 1092

Re: Cooling chargers?

Thanks T1 Terry. Good ideas!

I hadn't thought of air filters either so this morning I will be off to my local car spare parts place to see what they have.

Thanks again
Paul
by Paul9
Thu, 19 Sep 2019, 13:58
Forum: Batteries, charging, management and monitoring
Topic: Cooling chargers?
Replies: 10
Views: 1092

Re: Cooling chargers?

Thanks guys

jonescg - yeah good ideas and I never even thought about dust getting in.

Richo - I assume the fan in your picture is something like the "Fan Blower, Scircoco Ace 76 Series 109BD12HA2(HC2)[HD2" available from Element14?

Regards
Paul
by Paul9
Wed, 18 Sep 2019, 14:06
Forum: Batteries, charging, management and monitoring
Topic: Cooling chargers?
Replies: 10
Views: 1092

Cooling chargers?

G'day people, As you may be aware my battles with chargers seem to be a never ending story! I have used both TC/Elcon chargers and KPES (Kingpan) chargers and have had both types fail at various stages. At present I have a 2kw (or is that kW? - I should have checked Weber's post before I started wri...
by Paul9
Thu, 25 Jul 2019, 16:53
Forum: Batteries, charging, management and monitoring
Topic: LFP SOC vs Pack Voltage
Replies: 12
Views: 1188

Re: LFP SOC vs Pack Voltage

Thanks weber, my bad!
by Paul9
Thu, 25 Jul 2019, 13:09
Forum: Batteries, charging, management and monitoring
Topic: LFP SOC vs Pack Voltage
Replies: 12
Views: 1188

Re: LFP SOC vs Pack Voltage

Thanks guys much appreciated! I have read your posts, and the references in the posts, and the references in the references in the posts, and obviously far greater minds than mine have grappled with the problem. brendon_m, your diahatsu and my suzuki swift would be similar weights and sizes I guess....
by Paul9
Mon, 22 Jul 2019, 21:48
Forum: Batteries, charging, management and monitoring
Topic: LFP SOC vs Pack Voltage
Replies: 12
Views: 1188

Re: LFP SOC vs Pack Voltage

Thanks jonescg. When you say these are no load resting voltages - yes that is correct. When you say "that's pretty close" do you mean the cell voltages as per the table are pretty close to the SOC's I have determined or that the TBS Pro's SOC would be pretty close to the actual SOC? I am trying to d...
by Paul9
Mon, 22 Jul 2019, 21:09
Forum: Batteries, charging, management and monitoring
Topic: LFP SOC vs Pack Voltage
Replies: 12
Views: 1188

LFP SOC vs Pack Voltage

My question deals with estimating a battery bank’s State of Charge (SOC) from the voltage (OCV) of that bank. I understand that the difficulty lies with the relationship between SOC and voltage in lithium batteries being very non linear. Going back maybe 8 to 10 years this topic was discussed. At th...
by Paul9
Fri, 28 Jun 2019, 12:21
Forum: Charging Infrastructure
Topic: My first public fast charge
Replies: 14
Views: 1594

Re: My first public fast charge

Doesn't sound like "plug and play" coulomb?

Or is it something one would get used to quickly?
by Paul9
Sun, 23 Jun 2019, 09:58
Forum: Renewable Energy and Storage (Non-EV)
Topic: Small wind turbines
Replies: 5
Views: 736

Re: Small wind turbines

I have a 40 acre property 200kms west of Sydney. It is totally off grid. I have had PV panels and a 400watt wind turbine for over 10 years. acmotor's post above very accurately reflects my experience with PV and the turbine. The PV works less well in winter than in summer (no surprise there!) Becaus...
by Paul9
Sun, 16 Jun 2019, 14:01
Forum: Batteries, charging, management and monitoring
Topic: Damn Chargers!
Replies: 20
Views: 1981

Re: Damn Chargers!

I will investigate the TSM chargers with OzDIY. I have met Graeme before.

Maybe the only plus the Zivan might have is that they have a distributor not far from me.

Thanks
Paul
by Paul9
Sat, 15 Jun 2019, 12:32
Forum: Batteries, charging, management and monitoring
Topic: Damn Chargers!
Replies: 20
Views: 1981

Re: Damn Chargers!

Having had a "gutfull" of chargers blowing I am investigating buying a Zivan NG3 charger. The firm I emailed in the USA advised me: "Paul, We have the 240VAC 144V 18A Zivan NG3 chargers in stock. They sell for $1029 USD plus shipping. They can be programmed for 140.4VDC output." I wasn't sure if the...
by Paul9
Thu, 06 Jun 2019, 08:07
Forum: Batteries, charging, management and monitoring
Topic: Damn Chargers!
Replies: 20
Views: 1981

Re: Damn Chargers!

Thanks Richo

I will pass that info on to my brother.

Regards
Paul