They have no money to pay for the test that is why it is so quiet.
Very possibly. However, they also PR'd that they would get preliminary numbers to the investors at the earliest possible moment.
Those numbers require
- wiring
- ammeter
- flow meter (or buckets of known volume)
- clock
- time to run system, with municipal water pressure applied, with electric cord attached at both ends, with water valve open, with electricity turned on
- time to record results
- time to repeat a few times
- time to average results
- posting to company website
in other words, an afternoon !