Gauges on your GEM

I have a 2002 eL new to me, I’m not happy with the state of charge meter on it. It will read 100%, I drive it less than a mile and it reads 65%, the batteries are T-1275’s and are two years old in good condition.

I want to add more accurate gauges to better monitor the battery condition while driving.

Has anyone used this with the 200A shunt?

The Cycle Analyst Homepage - Ebike Amp-Hour and Watt Meter

Any comments on it pro or con?

If you’re using something else what is it, where did you get it and how do you like it’s performance?

Thanks for your time.

Paul

I have the same car. If your batteries are good the meter shouldn’t drop more than 5% at most in just one mile. I had one weak battery and it caused my meter to act like yours. Bob’s Battsix will show which battery is weak for sure. The old meter with good batteries seems to be right on… on my car. The meter reads the average battery voltage for the respective state of charge. I checked mine with a digital meter and it was right on. I find if I do a second charge right before leaving on a trip it will read 100% for several miles before it starts ticking down. I have six GC12s from Sam’s rated at 155 AH or 75 amps for 72 min…

I can’t be happier with my Battsix… I can see what the voltage of each battery any time… I have a dash unit and can even get a print out as well… I trust my charger but always look at the readings on the Battsix when I turn the key on to see that I have 100% charge… take a look at BATTSIX.COM

Bob

Bob,

Thanks for the Battsix info. I am also looking at the dash display rather than an app for the phone. I don’t have an “i” anything, I like to think I’m still smarter than my telephone:D

I can’t find a price on the unit or anyplace to order one. Where did you get yours?

Paul

Paul… contact Richard Briskin at rtbinvent@aol.com … use my name please … he will get back with you pretty quickly

Bob Andersen

Richard T. Briskin
BattSix Systems
Owner/Partner

(559) 360-4609

The BattSix is a great little tool but it is pricey. If you have the spare cash laying around it will provide you wil detailed info on your batteries. They also sell a dash display so you do not need a smart phone.

Here is their link - http://battsixsystems.com/

maybe but as my wife tells me… it’s the toys that makes the boy… and I paid with PayPal’s Bill Pay… used their money for 90 days

Bob

I went with the BATTSIX with the dash display, should have it in a couple of weeks, can’t wait to see the true condition of the pack at a glance.:slight_smile:

Paul

congrats Paul… I’m sure you will be happy… follow their directions on the wiring… I put the 'brain box in my glove compartmeny… doesn’t hake up a lot of room… I have an '05… not sure if yours is the same size… and the monitor on the front of the upper dashboard…think I’ve posted photos

Bob

Can someone tell me roughly how much a Batt-six with the dash display costs?

hi Jamieh… I’m not sure why prices aren’t published… I think Richard caters pricing to your needs… contact Richard Briskin at rtbinvent@aol.com … use my name please … he will get back with you pretty quickly

Bob Andersen

Richard T. Briskin
BattSix Systems
Owner/Partner

(559) 360-4609

Yes I purchased a Amp meter with 200Amp shunt from Westberg Mfg, 3400 Westach Way, Sonoma CA 95476 and a state of charge volt meter 62-80 Volt telephone number707-938-2121

I just ordered a BattSix on Tuesday. Hope it will be here soon

Battsix is having a 3 day sale with these units reduced 25% and an additional 5% if you pay using Paypal for anyone who has been considering getting one. So that’s 30% off total. The Bluetooth version is cheaper than the one with the dash display.
I’m going with the Bluetooth version so I can see it nice and big on my Nexus 7 tablet. Plus, I only need to check it now and then, not constantly.

[QUOTE=LuvMyTJ;14001]The BattSix is a great little tool but it is pricey. If you have the spare cash laying around it will provide you wil detailed info on your batteries. They also sell a dash display so you do not need a smart phone.

Here is their link - (see post above for URL)[/QUOTE]

Androidian… BattSix also was offering 12 of the new pack plotters… which only show the pack charge not each battery… for $123.00 delivered not the normal $200 regular price… see more on the BattSix link…

know you will be happy with the BattSix on your phone it is a tool that every GEM car or cart owner should have

Bob

I understand wanting to look at the information for the “gadget factor”, but full time monitoring of individual batteries is almost useless for taking care of your batteries IMHO. Spend less money on a good pack-level monitor like the Cycle Analyst, and occasionally hook up a cheap multimeter to each battery and go for a quick 60 second drive to test individual batteries.

Also, if you ever convert to lithium, the batt-six needs to be replaced anyway, or live with monitoring 4 cells each and losing individual cell monitoring.

Batt-six is “cool”, but other solutions would provide more actually useful information to the user.

[QUOTE=bgeery;15310]I understand wanting to look at the information for the “gadget factor”, but full time monitoring of individual batteries is almost useless for taking care of your batteries IMHO. Spend less money on a good pack-level monitor like the Cycle Analyst, and occasionally hook up a cheap multimeter to each battery and go for a quick 60 second drive to test individual batteries.

Also, if you ever convert to lithium, the batt-six needs to be replaced anyway, or live with monitoring 4 cells each and losing individual cell monitoring.

Batt-six is “cool”, but other solutions would provide more actually useful information to the user.[/QUOTE]

The BattSix is pricy but I’m a person that values seeing the cells with real data under load. Going through the effort (on mine at least) of having to stop, remove the seat, remove the battery cover, hook up a DVM, put it all back together, go for a ride, write down the readings, return and repeat the process 5 more times isn’t something that’s going to happen very often in my world at least. I imagine I’m not alone in that.

On my shelf are 6 analog edge panel meters I bought to use before buying the BattSix and they would have worked fine, but in the end, I was not willing to devote the space needed for 6 panel meters stacked side by side for this purpose someplace inside the cab and making an external pack would have simply gotten lost in my garage. About the time I got the drill out to start making holes, I contacted BattSix and ordered the Android one. It wasn’t that expensive given his discounts.

Now it’s installed, and I get the information I need. Pain over, usability started. It only hurts once.
I’m sure there are other solutions out there. Mine would have been about $100 for the surplus meters a few relays and some wire, a switch and connectors.

For about twice that, everything was made for me, didn’t take up dash space I didn’t have to make holes, and gave me information essential to living with a battery array over time without removing the seat repeatedly after installation. There are a lot of folks out there that run golf carts and LSV’s that don’t know what a meter is. But having said that, there are plenty that do and money matters so people have to find their own comfort.

My parents would run it dead and call me unless I had something they could monitor that they could understand. They live 3200 miles away.

For the folks that know their stuff, it could be considered a gadget, I guess, but for those that don’t, this is a valuable aid in preventing problems and beneficial toward analyzing those problems when they do occur.

One other factor is Richard at BattSix is very responsive to all customer contact and support. This is a large benefit for many.

Indeed, I can see it having in uses under some circumstances, and a couple hundred bucks isn’t the end of the world. The Lee Hart Battery Bridge is another alternative that will let you know of a bad battery in the pack for a few of dollars in parts. When a problem is detected, you still have to check each of the batteries in that half of the pack, individually.

I’m not sure what your point is… we who have bought and like our Battsix units are happy with the product… it doesn’t work with all battery configurations… your car is almost an EV or the next generation of NEV
Bob

I’m sure owners of the Batt-Six are very happy with the purchase, and they got what they expected. I’m just pointing out the disadvantages of the Batt-Six and listing some of the other alternatives.

IMO, the Batt-Six is just a fancy Lee Hart Batt Bridge. It’s trying to deduce state of charge from voltage using software magic. The only true way to measure SoC accurately in all conditions and with different batteries is to count the amp-hours in and out of the battery using a shunt (preferably). If the Batt-Six is anymore accurate than the built-in GEM fuel gauge, it’s by pure coincidence that the assumptions made in the Batt-Six software equations happen to match your particular set of batteries better than the software equations used in the stock GEM fuel gauge. I believe the earlier years GEMs based the fuel gauge on only the voltage, but the later models track the amp-hours. They started tracking amp-hours because it gave a more accurate fuel gauge estimation.

The less expensive alternative, the Cycle Analyst, that the poster asked about originally, offers more information useful for battery maintenance, monitoring, state of charge, and range estimation (plus a heck of a lot more). Everything except battery balance information. And that feature can essentially be filled with an inexpensive Lee Hart Battery Bridge circuit, if desired. A Lee Hart Battery Bridge circuit can even be expanded to offer individual battery monitoring, just like the Batt-Six. The feature set of the Cycle Analyst is incredible, looking at the user manual.

Some will want the cool factor of the Batt-Six. Others will want the geek factor of the information provided by the Cycle Analyst. There are probably a few out there that will have to have one of each.

Another alternative is the e-meter (I forget that they are calling the current version) like I use on my GEM (because I had it on hand already.) Works fine for me, but I would not buy one today. For the price, the Cycle Analyst is way cheaper, offers more features, and is more accurate at these higher voltages. However, the e-meter does integrate well with the current GEM instrument cluster. Just one more option for someone looking for something more than the stock GEM fuel gauge.