Originally Posted by JAM MaxAmps

If your power supply isn't giving enough power for the chargers you'll see a lower charge rate. If it's really underpowered you'll get an input voltage error. As for what Hyperion uses to test with it's likely an industrial power supply of sorts. This is a company that started in the RC plane side of the hobby so I highly doubt they are using a power supply that a racer would be using.

Jason