# Lifepo 4 Charger Over Voltage **URL:** \ **Category:** Do It Yourself (DIY)\ **Created:** [January 31, 2021, 2:09pm UTC](https://community.electricforum.com/t/lifepo-4-charger-over-voltage/20742 "2021-01-31T14:09:21Z")\ **Posts on this page:** 3\ **Page:** 1
**Author:** ![hadawayj](https://avatars.discourse-cdn.com/v4/letter/h/898d66/32.png) [@hadawayj](https://community.electricforum.com/u/hadawayj)\ **Post date:** [January 31, 2021, 2:09pm UTC](https://community.electricforum.com/t/lifepo-4-charger-over-voltage/20742/1 "2021-01-31T14:09:21Z")
Over Voltage Problem - I built a new Lifepo4 battery pack for my 2015 Gem Car. Using 24, 3.2v, 150Ah cells in series for 72 volts. This is fine but when I started looking for a 72-volt charger for the system I found the following for the charger 72v Lifopo4 - 24s - 87.6volts at 12amps. Is there a way around the 84 volt limit on the GEM car and is that safe. Any other suggestions? ---
**Author:** ![hadawayj](https://avatars.discourse-cdn.com/v4/letter/h/898d66/32.png) [@hadawayj](https://community.electricforum.com/u/hadawayj)\ **Post date:** [January 31, 2021, 2:15pm UTC](https://community.electricforum.com/t/lifepo-4-charger-over-voltage/20742/2 "2021-01-31T14:15:09Z")
After thinking about this some more I believe that a couple of years ago I bought something from Inwo that inserted in the harness, I believe pin 1, that allowed the GEM to get more than 84 volts and run safely. ??? ---
**Author:** ![MikeKC](https://avatars.discourse-cdn.com/v4/letter/m/90ced4/32.png) [@MikeKC](https://community.electricforum.com/u/MikeKC)\ **Post date:** [January 31, 2021, 5:14pm UTC](https://community.electricforum.com/t/lifepo-4-charger-over-voltage/20742/3 "2021-01-31T17:14:25Z")
Yes, this is called a spoof, they can be built for whatever your needs maybe. IE if you are running 100v then you would need at least a 15v spoof. 86v is the max voltage for a T-5 controller I believe. In your case you would need a 3v - 5v spoof to get you under 86v. @Inwo