A school's supply, written up so it could be argued
After commissioning a 20 kW system at a school with its own transformer, we logged the supply for four days. Undervoltage and three-phase unbalance appeared through daylight hours and vanished after dark — solar export backfeeding the transformer, worsened by its tap setting. We put the alarm logs and a root-cause statement in writing so the school could take a documented case to its utility instead of an anecdote.


