Sinrace Power Supply Technology (Shenzhen) Co., Ltd.

Here is a worst case : Power supplies in some electronic equipment will fall out of regulation. Errors, due to erratic power supply performance, may creep into computer operations. Marginally performing electronic or electric devices will cease operation. Electrical interference increases and may affect computer and communication operations.

Spikes generated by electrical machinery  greatly increase now. Such as air conditioners, refrigerators and other motorized devices will generate local spikes. Industrial machinery (often miles away) may create additional spikes which may find their way on to the electrical distribution network, and into your equipment.

The vast majority of low cost UPS units will continuously cycle between power line and internal battery operation. UPS batteries will soon discharge, unable to generate additional back up power. If the system has not been shut-down, the UPS and computer may snap back on when power rises slightly, only to shut down again when the power line voltage falls back into the brown-out zone. Such "ON-OFF" operational cycling is unhealthy for UPS, batteries and connected electronics.

More typically, milder cases of brownouts or voltage sags are often the cause of unexplained computer instabilities and the premature failure of components.