Resettable Amp Hours Transaction Meter?

Xantrex has a stand alone meter that can be reset as well but it's an order of magnitude more $$ than anything on Fleabay

I have several Arduino-clone devices logging current on branch circuits but my main 12v bus and 500 amp shunt are monitored by the Magnum. One of these days I'll hack into it's network connection and grab the data I need.

A Trimetric would do the job as described, but cost$.

Another thing not mentioned for AH meters is how they handle heat loss when charging a battery. Doesn't matter for discharge AH count.

Trimetric has a default charging efficiency percentage, but that can be adjusted to suit actual results.

USA uses four 8 mm bolts

Orientals use 33 4mm bolts.

Chibay seems to think the more readouts they can pack into a tiny display, the better

I am measuring single events. Charging,
Volts, watts, PSI, and other values hopelessly clutter the screen.
Don't want to spend a half hour programming the meter each time for single use - peukert - total amp hours - etc/
Don't want to be forced to use reading glasses to see amperage transacted.

Read this...

http://forums.aeva.asn.au/viewtopic.php?f=17&t=3368&start=50

The trouble you'll have is finding a resettable one... Why resettable? A hall effect unit will just measure in/out..

Are you just trying to count out after a 100% SOC?

Just trying to figure what your doing so we can help you better.

Resetting would be a mute point no? It would be zero when nothing is moving through it...

Are you looking for one that accumulates?

landyacht318 wrote:

...
I had bought one such similar product which came with 8awg Leads instead of 12, but found it, when including time for the KWH or Ah figures, to be wildly inaccurate, despite its readng on volts or amps to be closely inline with other meters/
...

This is the problem I have with my cheap ebay Ah meter.

Dunno if it's the poor quality shunt, timer, electronics, temperature fluctuations, peukert effect or what.

It is possible to "calibrate" the amps but have tried several times with no improvement in Ah.

I have been using the 130/ 150 amp wattmeters inline, on much of my loads and charging sources for a few years now. I have 45 amp anderson powerpoles on most every load or source in my rig, so I can put one of these wattemters inline and see WH, AH. Amp peak, watt peak, minimum voltage.

I have modified their 12AWg leads tp circuit board with 8awg leads so they can handle 40 amps continuous with minimal voltage drop.

I had bought one such similar product which came with 8awg Leads instead of 12, but found it, when including time for the KWH or Ah figures, to be wildly inaccurate, despite its readng on volts or amps to be closely inline with other meters/

More recently I say hat appeared to be another version, in a different casing with 8AWG leads, but when I pulled up my bookmark Amazon says it is not available and no idea whether it will be again.

https://www.amazon.com/HTRC-Precision-Analyzer-Measuring-Voltage/dp/B078LVT29K/ref=pd_sbs_469_2?_encoding=UTF8&pd_rd_i=B078LVT29K&pd_rd_r=MCKDMX82PW1DRR0ETM80&pd_rd_w=vzFy1&pd_rd_wg=eqAf3&psc=1&refRID=MCKDMX82PW1DRR0ETM80

Other than the one Windynation version, I've found these wattmeters to be both fairly accurate and precise an dan incredible tool to see what my Meanwell powersupply is supplying and has supplied.

I did fry one of the meters when soldering 8wg leds to where the 12AWG leads once resided, but that was 2.5 plus years ago and I have gotten a lot better at soldering since, and much of this is about the heat reservior, and good contact between the soldering gun contacts and the mating surfaces under the hex allen bolts.



I am interested in testing this meter wuth the hall effect sneor instead of a shunt::

https://www.amazon.com/DROK-Multimeter-Charge-Discharge-Electricity-Overvoltage/dp/B01MZIAJI0/ref=pd_sim_328_4?_encoding=UTF8&pd_rd_i=B01M5CWR2P&pd_rd_r=3T9DYCQTGM8B89M2V3XP&pd_rd_w=RXljR&pd_rd_wg=QA6Yk&refRID=3T9DYCQTGM8B89M2V3XP&th=1

Simple AH representation of battery recharges. Don't need clutter on the face. Don't need Peukert or CEF compensation. X number of minutes determined by timer. Constant voltage at saturated voltage level.

And the meters are difficult to root out.

Press a button and meter zeroes out. One direction of current, do not need bi-directional but if only available bi-directionl so be it.