An on-grid solar system switches off when the grid fails. This is a safety feature called anti-islanding: it stops your panels from sending power into lines that workers believe are dead. It is required by grid-connection standards.
What is islanding?
“Islanding” is when a solar system keeps powering a section of the grid that has been cut off from the main supply. It is dangerous for line workers and can damage equipment, so grid-tied inverters must detect a grid failure and stop exporting quickly.
Is this tested?
Yes. In India, IS 16169 covers islanding prevention for grid-connected inverters. Tenzor Supernova inverters are BIS registered (R-91022799) against it.
How do I keep power during cuts?
Use a hybrid inverter with a battery. The Hypernova disconnects from the grid when it fails, as required, and powers your backup loads from the battery instead, switching over in under 10 milliseconds. Solar keeps charging the battery during the day.
Which should I choose?
- Reliable grid, savings first: on-grid.
- Regular power cuts: hybrid with a Prime battery.
FAQs
Can I add a switch to keep my on-grid inverter running in a cut?
No. Bypassing anti-islanding is unsafe and against grid rules. Use a hybrid inverter for backup.
Does solar restart by itself after a cut?
Yes. An on-grid inverter reconnects automatically after the grid has been stable for a set time.