Search found 465 matches

by PlanB
Wed, 22 Feb 2017, 14:22
Forum: Other
Topic: The full Hyundai Ioniq range headed down under
Replies: 38
Views: 1821

The full Hyundai Ioniq range headed down under

The ioniq has battery thermal management which is a plus for me, my 50k km Leaf down to 9 bars now after 3 Sydney summers.
by PlanB
Wed, 22 Feb 2017, 14:19
Forum: The Lounge
Topic: PIP-4048MS inverter
Replies: 1863
Views: 169278

PIP-4048MS inverter

Does the problem still occur at sites with 2 or 3 pips running in parallel?
by PlanB
Tue, 21 Feb 2017, 22:39
Forum: The Lounge
Topic: PIP-4048MS inverter
Replies: 1863
Views: 169278

PIP-4048MS inverter

There was a mob in Melbourne (power & interference consultants I think) used to flog a portable ferroresonant line conditioner back in the 90s (couple of hundred bucks from memory). Very effective deglitcher, about he size of a housebrick, weighed 3 times as much! Be interesting to see if the harmon...
by PlanB
Fri, 20 Jan 2017, 18:07
Forum: General EV Discussion
Topic: Conversion completed.
Replies: 4
Views: 440

Conversion completed.

I had a 500whr ev scooter pack turn itself into a firework a year or two back & that was a sobering experience. Every time I get the urge to tinker with the Leaf traction pack I remember the episode & occupy myself with something else.
by PlanB
Sat, 26 Nov 2016, 03:59
Forum: Members Machines
Topic: Weber and Coulomb's MX-5
Replies: 1672
Views: 239616

Weber and Coulomb's MX-5

'Recompiling your car by the side of the road', now there's an interesting turn of phrase. Living in the future we are. Some things from the past still persist though, like 12-0-2 alarms http://newatlas.com/esa-schiaparelli-ma ... use/46614/
by PlanB
Fri, 15 Apr 2016, 00:15
Forum: Charging Infrastructure
Topic: University of Queensland & Solar powered Veefil
Replies: 4
Views: 538

University of Queensland & Solar powered Veefil

The $400k beamer sure looks the price tag, what model is it exactly?
by PlanB
Thu, 17 Mar 2016, 17:01
Forum: For Sale/Wanted
Topic: Nissan Leaf cells
Replies: 5
Views: 370

Nissan Leaf cells

Does anybody have a dead or empty (minus the 4 pouch cells) Leaf cell module they don't want? I've seen heaps of photos with dimensions but really need to get my hands on one for a better understanding.
by PlanB
Sat, 20 Feb 2016, 23:40
Forum: The Lounge
Topic: PIP-4048MS inverter
Replies: 1863
Views: 169278

PIP-4048MS inverter

Those Tesla modules are something to drool over are they not! I could never buy them for a solar app, the temptation to try to shoehorn them into the Leaf somehow would be just too great.
by PlanB
Sat, 20 Feb 2016, 23:32
Forum: The Lounge
Topic: Li Battery SOC
Replies: 8
Views: 413

Li Battery SOC

Good grief SOC hysteresis and instantaneous (current reversal) hysteresis! What a great read though, esp that bit on dithering hysteresis away! And did I see a 'subspace' reference in there to go with your Klingon like Warburg element?
by PlanB
Wed, 17 Feb 2016, 21:27
Forum: The Lounge
Topic: Li Battery SOC
Replies: 8
Views: 413

Li Battery SOC

Think I feel more like a lab rate in a battery metrics maze than an hysterical rhesus monkey Weber but I get your drift. Why 35% SOC as the transition point between the 2 different hysteresis corrections?
by PlanB
Tue, 16 Feb 2016, 15:59
Forum: The Lounge
Topic: Li Battery SOC
Replies: 8
Views: 413

Li Battery SOC

OK so if you have to pick an opportune & consistent point in the charge/discharge cycle to read OCV (say relaxed after a full charge) to defeat OCV hysteresis, that means you only know SOC at that invariant point. This is presumably why Weber is correcting OCV for internal resistance changes with te...
by PlanB
Sat, 13 Feb 2016, 22:06
Forum: For Sale/Wanted
Topic: EVSE for sale
Replies: 2
Views: 191

EVSE for sale

Unit sold.
by PlanB
Sat, 13 Feb 2016, 04:20
Forum: Batteries, charging, management and monitoring
Topic: Memory effect found in LiFePO4
Replies: 31
Views: 1697

Memory effect found in LiFePO4

Have you 87 III owners tried "3) Function Tip .. enable - disable high impedance .To enable the high impedance mode for the 87-3 or 87-5 press and hold the Hz button during power-up. The input impedance is changed from 10 Megohms to >4,000 Megohms. This function is useful to measure mili-volts on ve...
by PlanB
Thu, 11 Feb 2016, 23:10
Forum: The Lounge
Topic: Li Battery SOC
Replies: 8
Views: 413

Li Battery SOC

I'm puzzled by page 3 . Figure 2 shows OCV hysteresis (different voltages for the same SOC depending on past history, ie charging or discharging). But none of the models seem to allow for this? How can they claim to calculate SOC from OCV if they don't take charge/discharge hysteresis into account? ...
by PlanB
Thu, 11 Feb 2016, 20:05
Forum: The Lounge
Topic: PIP-4048MS inverter
Replies: 1863
Views: 169278

PIP-4048MS inverter

I've seen 2-3 pips in with the batteries in a standard 19" rackmount cabinet or similar enclosure. It makes for a tidy, transportable product & removable side panels address access issues but I wonder about the wisdom of heat sources in with the batteries? Having said that there are some intriguing ...
by PlanB
Mon, 08 Feb 2016, 23:45
Forum: The Lounge
Topic: PIP-4048MS inverter
Replies: 1863
Views: 169278

PIP-4048MS inverter

Impressive. So presumably you're well placed to answer the question of whether at low loads one or more PIPs shuts its inverter down to save idle current draw. This would be most apparent at night, when the load would be low, there is no solar charging, and if the solar day was reasonable, there wo...
by PlanB
Fri, 05 Feb 2016, 04:36
Forum: The Lounge
Topic: PIP-4048MS inverter
Replies: 1863
Views: 169278

PIP-4048MS inverter

Poor man's Victron?
by PlanB
Fri, 29 Jan 2016, 02:34
Forum: For Sale/Wanted
Topic: EVSE for sale
Replies: 2
Views: 191

EVSE for sale

For Sale: One Clipper Creek ECS - 15 Amps portable charger. Purchased for USD$763 in Dec 2013 but yours for AUD$500.00. Call Lee 0412 998 886
by PlanB
Thu, 14 Jan 2016, 22:26
Forum: The Lounge
Topic: PIP-4048MS inverter
Replies: 1863
Views: 169278

PIP-4048MS inverter

Not sure if this is relevant to the current conversation but I found the resolution of currents reported by the PIPS was give or take an amp. So at low idle powers something like 2A reported could be anywhere between 1A & 3A, most likely 3A since they tend to underead. Had to fudge a lot to get dece...
by PlanB
Wed, 06 Jan 2016, 17:50
Forum: The Lounge
Topic: PIP-4048MS inverter
Replies: 1863
Views: 169278

PIP-4048MS inverter

Dave/Mike, is the typo fix you made after your day with the monolith incorporated in the download posted a few pages back? Would like to avail myself of the improved low voltage cutout for lithiums.
by PlanB
Wed, 23 Dec 2015, 17:59
Forum: The Lounge
Topic: PIP-4048MS inverter
Replies: 1863
Views: 169278

PIP-4048MS inverter

Didn't feel like a mistake to me, I can use all the battery input I can get
by PlanB
Tue, 22 Dec 2015, 02:51
Forum: The Lounge
Topic: PIP-4048MS inverter
Replies: 1863
Views: 169278

PIP-4048MS inverter

Thnx for the detailed reply Dave, I don't have cell temperature & your comment "If you don't have actual battery temperature, ambient temperature is probably usable, but only for these systems that operate at 0.5C or less" suggests I need it since this system runs at room temperature (charge & disch...
by PlanB
Mon, 21 Dec 2015, 18:54
Forum: The Lounge
Topic: PIP-4048MS inverter
Replies: 1863
Views: 169278

PIP-4048MS inverter

The cells are Sinopoly LFP500AHA, I got asked to write some box monitoring code by a mate with ambitions in alternative energy. The subsequent charge/discharge cycles are all 15min so I just don't understand batteries all that well I guess (there is much better correspondence between cell voltage & ...
by PlanB
Mon, 21 Dec 2015, 15:04
Forum: The Lounge
Topic: PIP-4048MS inverter
Replies: 1863
Views: 169278

PIP-4048MS inverter

I'm getting some strange results on a 6 box system with a nominal 70kwh of usable storage. Takes 4 hours to charge from 52.4v to 58.4v at 15kw then 15mins from 58.4v back to 52.4v at 7kw discharge. I've validated all the data coming out of the boxes is correct, can't figure out why the discharge doe...
by PlanB
Sun, 20 Dec 2015, 15:30
Forum: The Lounge
Topic: PIP-4048MS inverter
Replies: 1863
Views: 169278

PIP-4048MS inverter

Site; (noun) that location where stuff developed & tested at another location exhibits a range of behaviours hitherto unseen.

I love the idea of the legacy system shedding some light on the new system while you reworked it, Murphy has a delicious sense of irony too.