Batteria Domestica as Emergency Power: What Works During a Blackout?

Power outage: how vulnerable are you?

Nei Paesi Bassi, the average homeowner experiences around 20-30 minutes of interruzione di corrente all'anno. Sounds like very little, but with critical equipment — medical devices, fridge, internet router, heating pump — even a brief outage can have serious consequences. As the rete elettrica becomes more strained by electrification and congestione della rete, the risk of prolonged outages increases.

A batteria domestica can protect you — but not every system offers the same level of protection. In this article, we explain the difference between EPS (Emergency Power Supply) and full backup systems, so you know exactly what to expect.

EPS vs full emergency power: the crucial difference

Most batterie domestiche offer one or both forms of emergency power functionality:

EPS (alimentazione elettrica di emergenza)

EPS is a rapid switchover to batteria power during a grid outage. The switchover time is tipicamente 20-100 milliseconds — fast enough for most elettrodomestici, but too slow for sensitive electronics such as certain medical devices. EPS tipicamente powers one or two circuits (e.g. fridge + lighting).

Full backup (whole-home backup)

High-voltage systems such as the Anker SOLIX X1 or Huawei LUNA 2000 with backup module offer a seamless transition of less than 20ms. They support the entire home including pompa di calore, caricatore EV and all circuits. This requires professional installazione with a backup switchboard.

Which systems offer emergency power? Comparison

Not every sistema di batterie domestiche offers emergency power functionality. Here is an overview of the most popular systems and their emergency power capabilities:

How long can you last on your batteria domestica?

The autonomy time depends on the capacità della batteria and your consumption during the outage. As a rule of thumb:

• 5 kWh batteria + basic consumption (200W): ~25 hours (fridge, lighting, router)
• 10 kWh batteria + normal nucleo familiare (500W avg.): ~18-20 hours
• 15 kWh batteria + pompa di calore (2 kW): ~6-8 hours continuous use
• With pannelli solari added: unlimited as long as the sun shines and you don't consume more than you generate
• Medical equipment: a UPS (Uninterruptible Power Supply) with batteria is better suited for critical medical equipment due to the more immediate switchover

Installazione requirements for emergency power

Emergency power requires more than just a batteria. For a fully functional emergency power installazione, you need:

What do you need tecnicamente?

For EPS on specific circuits: a backup output on your inverter and separate wiring to an emergency power group in your quadro elettrico. For whole-home backup: an automatic transfer switch (ATS) that disconnects the home from the grid during an outage, so the batteria can safely supply power without feeding back to the grid.

Legislation and regulations

Nei Paesi Bassi, you are not permitted to feed back to the grid during a grid outage — this is dangerous for engineers working on the grid. Professional backup systems automatically disconnect the allacciamento alla rete (islanding protection). Always check that your installatore carries this out correctly in accordance with NEN 1010 and the requirements of your operatore di rete.

Which system suits your emergency power needs?

The choice depends on your priorities and budget. For basic protection (fridge, lighting, router), a system with EPS is sufficient. For full home protection including pompa di calore and caricatore EV, choose a high-voltage system with whole-home backup module.

Want to know which system best suits your situation and emergency power needs? Request free advice — our advisers know the technical details of every system in our range.