# R2 power sensor module and voltage multiplier not work

**URL:** <https://discuss.bluerobotics.com/t/r2-power-sensor-module-and-voltage-multiplier-not-work/9096>\
**Category:** Batteries and Chargers\
**Created:** [February 18, 2021, 12:07am UTC](https://discuss.bluerobotics.com/t/r2-power-sensor-module-and-voltage-multiplier-not-work/9096 "2021-02-18T00:07:28Z")\
**Posts on this page:** 3\
**Page:** 1

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**Author:** ![linzhao](https://avatars.discourse-cdn.com/v4/letter/l/34f0e0/32.png) [@linzhao](https://discuss.bluerobotics.com/u/linzhao)\
**Post date:** [February 18, 2021, 12:07am UTC](https://discuss.bluerobotics.com/t/r2-power-sensor-module-and-voltage-multiplier-not-work/9096/1 "2021-02-18T00:07:28Z")

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Hi, I am using R2 PSM in my ROV. But the battery monitor is not right, I’ve tested for coupled days. The most recent test is shown here:

 ![r2_selection](https://us1.discourse-cdn.com/flex019/uploads/bluerobotics/original/2X/6/6a7bd319cd432144b0ebc0c39ee68f4bb8772dd9.png)  
It’s only about 5.57v, the truth is around 14.5V. Then I change the voltage multiplier after I type 14.5V. After 3 hours running(bot running the motor), the result is shown below:  
 ![after_3h](https://us1.discourse-cdn.com/flex019/uploads/bluerobotics/original/2X/7/715af2691c15e129f37f5be59eef1f573c2ff86b.png)  
It didn’t change, but the truth is around 14.1V. This test not draw a lot of power, but I tested full charged battery with 16.7V after 2V used, still shown 16.7V in Qgroundcontrol.

Appreciated for any suggestions. Thanks.

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**Author:** ![patrickelectric](https://sea1.discourse-cdn.com/flex019/user_avatar/discuss.bluerobotics.com/patrickelectric/32/2162_2.png) [@patrickelectric](https://discuss.bluerobotics.com/u/patrickelectric)\
**Post date:** [February 23, 2021, 11:04am UTC](https://discuss.bluerobotics.com/t/r2-power-sensor-module-and-voltage-multiplier-not-work/9096/2 "2021-02-23T11:04:51Z")

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Hi @Lin,

I would recommend to set the default parameters to make sure that your ROV is configured correctly for the battery, or follow our configuration guide for the power sensor:

> **[Power Sense Module (PSM) Installation](https://bluerobotics.com/learn/power-sense-module-psm-installation/)**
>
> Learn how to install and setup a Power Sense Module on your BlueROV2 or other underwater project!

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**Author:** ![linzhao](https://avatars.discourse-cdn.com/v4/letter/l/34f0e0/32.png) [@linzhao](https://discuss.bluerobotics.com/u/linzhao)\
**Post date:** [February 25, 2021, 12:39am UTC](https://discuss.bluerobotics.com/t/r2-power-sensor-module-and-voltage-multiplier-not-work/9096/3 "2021-02-25T00:39:14Z")

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Thanks for your reply. I just doubled check this guide. I believed all the connection is right, also all the setup is same to the Software Setup. Also, this is the brand new PSM(we brought a new one is test this wired situation).

Could you give more suggestions?