The most common myth: “I have solar, so I will be powered”
In reality, most standard photovoltaic installations shut down during a grid outage for safety reasons. The ability to hold an outage depends on the electrical architecture, not just the panels.
The 7 truths to remember
A standard installation does not continue automatically
Without a dedicated backup function, conventional solar power shuts down when the grid goes down.
Backup depends on architecture, not number of panels
More modules are not enough. Islanding or emergency exit logic is required from the design stage.
A battery often helps, but not always alone
Storage can play a central role, but only if the inverter and system are designed to maintain uninterrupted power.
You have to know what you want to rescue
Rescuing the entire house does not have the same logic as preserving a few critical circuits: fridge, internet, lighting, heat pump or dedicated socket.
The power available as backup is a real constraint
A backup system does not necessarily provide access to all the usual power of the building. We must prioritize uses.
Backup must be tested, not just sold
A sales promise is no substitute for a clear diagram, consistent commissioning and an understanding of what remains powered in practice.
The right project starts from a realistic outage scenario
If you are looking for real continuity, you must define in advance the targeted level of autonomy, the probable duration and the really priority circuits.