Blog - Micro-Inverters

The Micro-Inverter Safety and Operation FAQs

The Micro-Inverter Safety and Operation FAQs

09.Dec 2012
| Blog - Micro-Inverters

The Micro-Inverter Safety and Operation FAQs

Q: Can the Micro-Inverter work in off-grid mode (island mode)?

Answer: No. The Micro-Inverter is designed only as the grid-tied (or on-grid) inverter. It works simultaneously (in harmony) with the 230V AC grid.

Q: How will the Micro-Inverter behave when the grid is down?

Answer:  If the AC grid is turned off, perhaps because of fuse is blown, or there is some repair on the cables, the Micro-Inverter will shutdown immediately. This shutdown function is one of the parameters certified by EU standards for electric safety.

The shut-down function means the Micro-Inverter does not produce any electricity when the grid is turned off, even if the solar panels are at full sunshine.

The Micro-Inverter has the anti-islanding function and will not work without the AC grid voltage supplied.

Q: What will the Micro-Inverter do when there is short circuit on the AC power line?

Answer:  If the impedance of the power-line changes bellow a specified limit, the Micro-Inverter will stop working immediately.  Actually the Micro-Inverter may stop much faster than the ordinary B or C characteristic circuit-breaker.  This anti-short circuit protection is one of the parameters tested to comply with by the EU safety norms.

Q: The grid utility company in my country does not allow to connect any solar products tied with grid. They require full galvanic separation.

Answer: The Micro-Inverter is equipped with fully galvanic separation by means high-frequency transformers. This means that the DC solar panels are electrically disconnected from the grid and they are fully galvanic separated.  This requirement is again one of the essential safety standards by the EU norms and the Micro-Inverter is tested to comply with these standards.

Conclusion: the Micro-Inverters are tested to all safety standards and can be installed and work directly with the AC 230V grid in all  European countries.

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