Anti-Islanding Evidence for Microinverters: What Distributors Should Verify

“Anti-islanding included” is not enough evidence for a distributor listing a microinverter in a new market. The buyer must connect the exact model, firmware or country profile, applicable grid rule, test evidence and network-operator process.

Anti-islanding protection is intended to stop a grid-connected generating system from continuing to energize an unintended island after the network supply is lost. Test methods and acceptance settings depend on the market framework. IEEE 1547 addresses interconnection and interoperability in the United States, IEC 62116 provides a test procedure for islanding prevention measures, and national rules can add different documentation or registration routes.

Ask for the evidence chain

The review should link five items:

1. Exact inverter model and suffix on the sales unit
2. Hardware and relevant firmware or country-profile revision
3. Applicable grid-code or test standard edition
4. Laboratory report, certificate or register entry covering that identity
5. Local utility application or notification requirement

A report for a related family is acceptable only when its scope or technical construction file clearly includes the offered model.

Do not confuse separate compliance questions

Question	Typical evidence
Can the product disconnect under island conditions?	Model-linked test evidence
Are voltage/frequency settings correct?	Country profile and grid-code report
Is the equipment electrically safe?	Applicable product-safety evidence
Is EMC addressed?	EMC report and technical file
May it connect at this site?	Utility/DNO process and project approval

The EMC importer checklist and grid voltage and phase guide cover two of these adjacent questions. Passing one does not imply the others.

Control the country profile

Document who selects the country profile, how access is controlled and how commissioning verifies the active settings. Avoid generic instructions that tell an installer to choose the “closest” country. Protection thresholds and response functions must match the approved route.

If remote configuration is possible, define authorization, logging and the effect of firmware updates. A product certificate can lose practical value if the installed settings do not match its evaluated configuration.

Check the local connection path

Some markets use equipment registers, type-test forms or capacity-based notification routes. Others require project review. Confirm the responsible network operator and the applicable edition at quotation time. Do not present a national certificate as automatic permission for every site.

For India-bound orders, the India BIS/QCO supplier checklist connects IS 16169 anti-islanding evidence to BIS registration, IS 16221 safety evidence, laboratory scope and shipment controls.

For the grid-tied APHV Series, request the exact market evidence during configuration review. Send the destination, network operator, model, capacity, firmware/profile requirement and connection route through TMG Contact. The response should identify evidence supplied, open approvals and settings to verify during commissioning.