# Battery equalizer

**URL:** <https://community.electricforum.com/t/battery-equalizer/14875>\
**Category:** GEM Forum\
**Created:** [November 7, 2018, 5:35am UTC](https://community.electricforum.com/t/battery-equalizer/14875 "2018-11-07T05:35:11Z")\
**Posts on this page:** 4\
**Page:** 1

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**Author:** ![Inwo](https://yyz2.discourse-cdn.com/flex030/user_avatar/community.electricforum.com/inwo/32/1067_2.png) [@Inwo](https://community.electricforum.com/u/Inwo)\
**Post date:** [November 7, 2018, 5:35am UTC](https://community.electricforum.com/t/battery-equalizer/14875/1 "2018-11-07T05:35:11Z")

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Seems like this is better than adding a 12v battery.  
 ![s-l400-28](https://canada1.discourse-cdn.com/flex030/uploads/electricforum/original/2X/5/532312a2f43570c48447707d5bb3fc35a38e5ab6.jpeg)

The new Gem taps into a 12v battery.  
This is a 20a balancer. You can charge all batteries from a single 12v charger or maintainer.  
48v, but 72v also available.

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**Author:** ![Inwo](https://yyz2.discourse-cdn.com/flex030/user_avatar/community.electricforum.com/inwo/32/1067_2.png) [@Inwo](https://community.electricforum.com/u/Inwo)\
**Post date:** [November 11, 2018, 10:58pm UTC](https://community.electricforum.com/t/battery-equalizer/14875/2 "2018-11-11T22:58:07Z")

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Have this one coming for my 48v gem.

 ![image](https://canada1.discourse-cdn.com/flex030/uploads/electricforum/original/2X/8/8a82f8ec833be23055be4e7936803d8157c27823.jpeg)

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<div class="post-metadata">

**Author:** ![Inwo](https://yyz2.discourse-cdn.com/flex030/user_avatar/community.electricforum.com/inwo/32/1067_2.png) [@Inwo](https://community.electricforum.com/u/Inwo)\
**Post date:** [November 11, 2018, 11:15pm UTC](https://community.electricforum.com/t/battery-equalizer/14875/3 "2018-11-11T23:15:49Z")

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The 72v version.  
This will let you use mismatched batteries. Helpful if one battery dies.  
Charge all with a 12v battery charger.

> **[Battery Equalizer 72V Batteries Voltage Balancer for Lead Acid Battery saver |...](https://www.ebay.com/itm/Battery-Equalizer-72V-Batteries-Voltage-Balancer-for-Lead-Acid-Battery-saver/283054280352?hash=item41e7598ea0:g:wYEAAOSw2yNbSF2k:rk:1:pf:0)**
>
> (need to modify the charging port wiring). Thermal runaway warning when the thermal runaway occurs, indicating that water should be filled. The definition of the equalizer working status When removing the equalizer, first remove the black line. |...

At 20amp rate it should also allow use of a 24v or 36v inverter.

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**Author:** ![MikeKC](https://avatars.discourse-cdn.com/v4/letter/m/90ced4/32.png) [@MikeKC](https://community.electricforum.com/u/MikeKC)\
**Post date:** [November 11, 2018, 11:58pm UTC](https://community.electricforum.com/t/battery-equalizer/14875/4 "2018-11-11T23:58:03Z")

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That is pretty cool!!!