# Power Sense Module questions **URL:** \ **Category:** Blue Robotics Products\ **Created:** [July 26, 2022, 3:43am UTC](https://discuss.bluerobotics.com/t/power-sense-module-questions/12604 "2022-07-26T03:43:59Z")\ **Posts on this page:** 7\ **Page:** 1
**Author:** ![HanJIK](https://avatars.discourse-cdn.com/v4/letter/h/858c86/32.png) [@HanJIK](https://discuss.bluerobotics.com/u/HanJIK)\ **Post date:** [July 26, 2022, 3:43am UTC](https://discuss.bluerobotics.com/t/power-sense-module-questions/12604/1 "2022-07-26T03:43:59Z")
In the case of blue rov’s power module, 25.2V 100A is used, and I would like to know what criteria was selected. For example, I want to know whether it is based on total power (W) or total current (A). Also, could the soldering part melt due to overheating of the power sensor module? ---
**Author:** ![EliotBR](https://sea1.discourse-cdn.com/flex019/user_avatar/discuss.bluerobotics.com/eliotbr/32/6937_2.png) [@EliotBR](https://discuss.bluerobotics.com/u/EliotBR)\ **Post date:** [July 27, 2022, 11:44am UTC](https://discuss.bluerobotics.com/t/power-sense-module-questions/12604/3 "2022-07-27T11:44:47Z")
Hi @HanJIK, I’ve moved these questions together here because they didn’t really fit where they were originally posted. I would expect the answers are “total current”, and “not with reasonable use”, but I’m not completely certain so I’ve asked internally to get confirmation / see if there’s something I’m missing. ---
**Author:** ![EliotBR](https://sea1.discourse-cdn.com/flex019/user_avatar/discuss.bluerobotics.com/eliotbr/32/6937_2.png) [@EliotBR](https://discuss.bluerobotics.com/u/EliotBR)\ **Post date:** [July 27, 2022, 11:27pm UTC](https://discuss.bluerobotics.com/t/power-sense-module-questions/12604/4 "2022-07-27T23:27:53Z")
> [@EliotBR](#): > > I’ve asked internally to get confirmation / see if there’s something I’m missing. Following up on this, > [@rjehangir](#): > > The current is what causes heating, and our power sense module was designed to handle an appropriate amount of current for the BlueROV2. > > If you run the module continuously above the current rating, then the solder joints could heat up enough to desolder. I see our ratings are kind of unclear because we only provide a non-continuous max rating. We don’t have a continuous rating right now, but we’ve tested extensively on BlueROV2s in different operating conditions and determined that it handles that use case well. ---
**Author:** ![HanJIK](https://avatars.discourse-cdn.com/v4/letter/h/858c86/32.png) [@HanJIK](https://discuss.bluerobotics.com/u/HanJIK)\ **Post date:** [August 2, 2022, 8:40am UTC](https://discuss.bluerobotics.com/t/power-sense-module-questions/12604/5 "2022-08-02T08:40:21Z")
> [@EliotBR](#): > > > [@](#): > > > > If you run the module continuously above the current rating, then the solder joints could heat up enough to desolder. I see our ratings are kind of unclear because we only provide a non-continuous max rating. We don’t have a continuous rating right now, but we’ve tested extensively on BlueROV2s in different operating conditions and determined that it handles that use case well. Thank for reply Let me ask you one more thing If 6 25.2V 24.5A thrusters are operated, how many volts and amps should the POWER SENSOR MODULE be used? ---
**Author:** ![EliotBR](https://sea1.discourse-cdn.com/flex019/user_avatar/discuss.bluerobotics.com/eliotbr/32/6937_2.png) [@EliotBR](https://discuss.bluerobotics.com/u/EliotBR)\ **Post date:** [August 2, 2022, 9:16am UTC](https://discuss.bluerobotics.com/t/power-sense-module-questions/12604/6 "2022-08-02T09:16:49Z")
> [@HanJIK](#): > > If 6 25.2V 24.5A thrusters are operated, how many volts and amps should the POWER SENSOR MODULE be used? The electrical characteristics of your power sensor depend mostly on the output capacity of your power supply. If your battery is 25.2 V then you need a power sensor that can handle at least that amount. If you’re expecting all 6 thrusters to have full throttle at once then you’ll have peak currents as high as 147 A (plus the current for your other electronics), and you’ll need your power sensor to at least be able to pass through that amount of current, and preferably also measure up to that amount. It may make more sense to determine the current limit based on the capacity of your power supply / battery, because you’ll need to be limiting throttle to within that level anyway (otherwise your control electronics may restart themselves due to under-powering). ---
**Author:** ![HanJIK](https://avatars.discourse-cdn.com/v4/letter/h/858c86/32.png) [@HanJIK](https://discuss.bluerobotics.com/u/HanJIK)\ **Post date:** [August 3, 2022, 12:47am UTC](https://discuss.bluerobotics.com/t/power-sense-module-questions/12604/7 "2022-08-03T00:47:48Z")
Thank you for answer. If the battery/power supply is decided around 24V 160A, how should the voltage and ampere range of the power sensor module be? This part is difficult. ---
**Author:** ![EliotBR](https://sea1.discourse-cdn.com/flex019/user_avatar/discuss.bluerobotics.com/eliotbr/32/6937_2.png) [@EliotBR](https://discuss.bluerobotics.com/u/EliotBR)\ **Post date:** [August 3, 2022, 8:13pm UTC](https://discuss.bluerobotics.com/t/power-sense-module-questions/12604/8 "2022-08-03T20:13:45Z")
> [@HanJIK](#): > > If the battery/power supply is decided around 24V 160A, how should the voltage and ampere range of the power sensor module be? You should be ok as long as your power sensor can handle the power supply capacity. For some extra robustness you can make sure it’s rated to a bit above, but if you’re operating outside the capacity of your supply then you likely have bigger issues than not being able to accurately measure exactly how much power you’re using