# Centaur Charger charge voltage is too high and never enters the float stage

**URL:** <https://community.victronenergy.com/t/centaur-charger-charge-voltage-is-too-high-and-never-enters-the-float-stage/56034>\
**Category:** DIY\
**Tags:** lead-acid, marine, diy\
**Created:** [4 April 2026 17:29 UTC](https://community.victronenergy.com/t/centaur-charger-charge-voltage-is-too-high-and-never-enters-the-float-stage/56034 "2026-04-04T17:29:10Z")\
**Posts on this page:** 3\
**Page:** 1

<div class="post-metadata">

**Author:** ![robfield](https://avatars.discourse-cdn.com/v4/letter/r/e68b1a/32.png) [@robfield](https://community.victronenergy.com/u/robfield)\
**Post date:** [4 April 2026 17:29 UTC](https://community.victronenergy.com/t/centaur-charger-charge-voltage-is-too-high-and-never-enters-the-float-stage/56034/1 "2026-04-04T17:29:10Z")

</div>

I have a Centaur 12/40 battery charger that the charge voltage for LA batteries is too high. I have bench tested the unit with a single good deep cycle battery and the charge voltage was 14.82V @ 2A. I found a jumper between TP1 and TP3 near the blue pot on the circuit board and removed it. Then I bench tested again and the charge voltage was 13.82V @ 1A. In both cases the charge voltage never dropped to float voltage after the 4 hour timer at less than 70% charge current should have expired. Can someone please tell me what the jumper is for and what is the purpose of the 4 test points and remaining 6 pins near the blue pot. What could be stopping the charger from changing to float mode?

Thanks Rob

---

<div class="post-metadata">

**Author:** ![MikeD](https://dub1.discourse-cdn.com/victron/user_avatar/community.victronenergy.com/miked/32/1522_2.png) [@MikeD](https://community.victronenergy.com/u/MikeD)\
**Post date:** [4 April 2026 19:49 UTC](https://community.victronenergy.com/t/centaur-charger-charge-voltage-is-too-high-and-never-enters-the-float-stage/56034/2 "2026-04-04T19:49:21Z")

</div>

see [https://www.victronenergy.com/upload/documents/Manual-Centaur-charger-EN-NL-FR-DE-IT.pdf](https://www.victronenergy.com/upload/documents/Manual-Centaur-charger-EN-NL-FR-DE-IT.pdf)

 ![image](https://europe1.discourse-cdn.com/victron/original/3X/7/9/7936c67bf55c7591a0bb31dad57e1db133e640a6.png)  
seems that float voltage should be 13.5V

---

<div class="post-metadata">

**Author:** ![robfield](https://avatars.discourse-cdn.com/v4/letter/r/e68b1a/32.png) [@robfield](https://community.victronenergy.com/u/robfield)\
**Post date:** [5 April 2026 14:56 UTC](https://community.victronenergy.com/t/centaur-charger-charge-voltage-is-too-high-and-never-enters-the-float-stage/56034/3 "2026-04-05T14:56:21Z")

</div>

Thanks Mike, I already have the manual. The test points and jumper I am talking about are circled in the attached picture.

 ![20260405_114332](https://europe1.discourse-cdn.com/victron/original/3X/2/8/28aac0731f315dfdc844dddd5bf0c331fdacd883.jpeg)