Power Stations for Backup Power and UPS

A classic UPS (uninterruptible power supply) keeps computers running without interruption during a power cut. Power stations with a UPS or EPS function work in a similar way: they stay connected to the mains, pass the power through and switch to the battery during an outage. Depending on the model, the switchover time is usually between about 10 and 30 milliseconds. That is enough for routers, fridges and most power supplies; very sensitive servers or measuring equipment need an online UPS with true zero transfer time.

The advantage over an office UPS: the capacity is many times greater. Instead of a few minutes to shut down, you gain hours. Make sure the manufacturer explicitly supports continuous operation on the mains – not every model is designed for permanent pass-through.

For emergency preparedness, what counts most is which devices you want to power and for how long.

In a home office, a small UPS power station protects router, monitor and laptop against short outages. Aquarium keepers protect pumps and heaters. In detached houses with gas heating, a professionally connected power station can keep the heating controls and circulation pump running so the house does not cool down in winter. For preparedness, German authorities recommend being able to maintain lighting, information (radio) and communication for a few days without mains power – a medium-sized unit is often enough for that.

For basic preparedness – lights, radio, phone, router – a unit with 300 to 500 Wh is enough. If the fridge needs to last a day, plan for around 1,000 Wh. For heating controls, a chest freezer and several devices over a longer period, 2,000 Wh or more makes sense, ideally with a solar panel for recharging.