Export and Metering

The approved method for measuring and settling energy exchanged with the grid.

Hybrid systems can be configured for export, limited export or zero export, but available modes depend on the inverter, meter placement, protection design and local utility rules. Billing settlement and physical backup operation are separate subjects.

Collect

Gather complete and legible inputs

Verify

Check the site, equipment and current process

Record

Keep confirmed decisions in the project file

Why It Matters

How this information affects design, approval, cost and project reliability.

The meter and settlement method determine how exported energy is recorded and valued.
Incorrect current-transformer direction or meter placement can make import/export data unreliable.
Zero-export control requires compatible measurement and inverter configuration.
Backup circuits must disconnect or operate according to the approved anti-islanding design during outages.

Complete Checklist

Everything that should be collected or confirmed for this readiness topic.

Applicable net, gross, net-billing or no-export arrangement.
Utility permission and agreement requirements.
Existing meter type and required replacement or additional meter.
Meter procurement, testing, charges and installation responsibility.
Approved inverter and anti-islanding configuration.
Export limit or zero-export setting where required.
Energy-meter or current-transformer location, phase mapping and communication.
Commissioning evidence for import, export and backup behavior.

Verification Process

The practical sequence used to review and confirm the information.

Confirm the settlement method from current utility instructions.
Review meter and agreement requirements before final electrical design.
Install measurement devices at the approved connection point.
Verify phase mapping and current-transformer direction.
Test import, export limitation and zero-export response as applicable.
Confirm anti-islanding and backup transfer behavior during commissioning.

Common Issues to Avoid

Frequent gaps that cause redesign, delay, rejection or unrealistic expectations.

Net metering is promised without checking consumer or system eligibility.
A monitoring meter is confused with the utility revenue meter.
Current transformers are installed in the wrong direction or on the wrong phases.
Zero-export control is configured but not functionally tested.
The owner assumes battery discharge to grid is allowed because solar export is allowed.

Records Produced

The documents or outputs that should remain in the final project file.

Approved metering and settlement summary.
Meter and current-transformer layout.
Net-metering or interconnection agreement where applicable.
Import/export commissioning test.
Final export-control setting record.
Utility commissioning certificate where issued.

Ready When

The completion conditions that allow the proposal to move forward confidently.

The applicable settlement method is confirmed.
Meter type, procurement and installation responsibilities are clear.
Export or zero-export mode matches utility approval.
Measurement direction and phase mapping are tested.
Grid outage and anti-islanding behavior are verified.

Important planning note

Export permission, billing settlement and battery discharge rules are utility-specific; do not infer one from another.

Start proposal review