High Voltage or Current in a Power System
The scope of this topic is going to be achieving the same power level in all comparisons. For example a 6s battery at 60 amps will provide the same power output of a 3s battery at 120 amps, about 1300 watts. Which setup is best?
There’s a 2 part answer to this question
Part 1 - If you have no limitations when building your power system, and are new to selecting power systems: it can be easier, safer and more reliable to run a higher voltage then a higher current.
Part 2 - For the rest of the setups out there a reliable setup can be had of either a high voltage or a high current setup. In many cases a higher current setup may be required and this is OK.
This is true as one would be able to select the appropriate components to suit the specific setup. If you have a high voltage setup, select the correct components that match the voltage specs. If you have a high current setup, select your power system to match the current. When power systems fail, the most common cause is too high of a load placed on the power system or a battery that is not suited for the task. This is where it appears that a higher voltage setup is the way to go. The difficult part about a high current setup is that it is not as predictable due to current being related to the load placed on a power system.
Factors that Contribute to Power system selection:
Racing Specifications
6s to 8s LiPo Limit on ESC’s suggesting higher costs to run a higher voltage setup.
There’s no weight advantage to either solution. 6s 45C 5000 (max amps 225) equal in weight to a 8s 45C 3750 (max amps 168.75A)
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