Does this approve a DNSP export limit?

No. It compares user-entered values only. DNSP connection conditions, export controls and approvals remain external.

What is site load offset?

It is an entered load value that reduces the net export in this worksheet. Keep its source visible because it may be a planning assumption, not a guarantee.

Why can net export be zero?

If the entered site load offset is greater than inverter export, the worksheet does not report negative export.

How is three-phase current calculated?

The worksheet uses the entered voltage and the square root of 3 phase factor for three-phase export current.

Should I use this before inverter AC cable review?

Use it to record net export and current context, then keep cable voltage-rise review as a separate task.

Solar export limit worksheet calculator

NetExport = max(Pinv - Pload, 0); Margin = Elimit - NetExport; Curtailment = max(NetExport - Elimit, 0); Iexport = NetExport x 1000 / (Fphase x V)

DNSP export limit is entered by the user.
Site load offset is an entered planning value unless measured separately.
Three-phase current uses square root of 3 as the phase factor.
The worksheet does not approve network connection or inverter settings.

Formula variables
Variable	Meaning	Unit	Use
Pinv	Inverter export	kW	Entered inverter export capacity or comparison value.
Pload	Site load offset	kW	Entered site load offset used to reduce net export.
NetExport	Net export	kW	Inverter export minus site load offset, not below zero.
Elimit	Entered DNSP export limit	kW	User-entered DNSP or project export limit value.
Margin	Export margin	kW	Entered export limit minus net export.
Curtailment	Curtailment required	kW	Net export above the entered limit, not below zero.
Fphase	Phase factor	factor	Use 1 for single phase and square root of 3 for three phase.
V	Voltage	V	Entered 230 V or 400 V project basis.
Iexport	Export current	A	Net export converted to current using selected phase basis.

Solar export limit worksheet calculator technical guide

Compare entered inverter export, site load offset and DNSP export limit values for Australian solar export planning records.

Use this page when a solar project needs a traceable export-limit worksheet before discussing export control, inverter scheduling, AC cable review or DNSP documentation. The page compares entered values; it does not decide whether export is allowed.

Export Limit Boundary

This calculator does not approve network connection, DNSP export limits, inverter settings, protection settings, commissioning outcomes or product configurations. It records arithmetic from values entered by the user.

Export worksheet boundaries
Task	Use this page?	Why
Net export margin	Yes	This page owns inverter export minus site load offset compared with an entered limit.
Inverter sizing ratio	No	Use the inverter sizing record for DC/AC ratio.
AC cable voltage rise	No	Use inverter AC cable voltage drop once current and route data are known.
DNSP approval	No	Network rules and approval outcomes are external.
Inverter settings	No	Settings require product, commissioning and DNSP review.

Data Checklist

Export input sources
Value	Where it normally comes from	Stop if
Inverter export	Inverter schedule, product record or export-control basis	The capacity basis is unclear.
Site load offset	Planning record, measurement basis or control strategy	It is being treated as guaranteed without source.
DNSP export limit	DNSP condition, application note or project record	The value is not current or site-specific.
Phase and voltage	Supply context or project schedule	The current conversion basis is wrong.

Review Workflow

Identify the export worksheet reference from the DNSP application, inverter schedule or design note.
Select single-phase or three-phase context and confirm the voltage basis.
Enter inverter export and site load offset values from the source record.
Enter the DNSP export limit only as a user-supplied comparison value.
Read net export, margin, curtailment required and export current together.
If margin is negative, review export-control assumptions, DNSP requirements and inverter data outside this calculator.
Keep the exported worksheet with the DNSP source, site load offset source and reviewer details.

Worked Records

Export limit examples
Situation	Inputs	Result	Record use
Single-phase export review	8 kW inverter export, 2 kW site load offset, 5 kW limit, 230 V	6 kW net export, -1 kW margin, about 26.09 A	Stop for export-control and DNSP review.
Three-phase current record	15 kW inverter export, 3 kW load offset, 10 kW limit, 400 V	12 kW net export, about 17.32 A	Keeps current basis visible for downstream AC review.
Site load offset within limit	8 kW inverter export, 3.5 kW offset, 5 kW limit	4.5 kW net export, +0.5 kW margin	Inside the entered limit, subject to source review.

Stop Points

DNSP export limit source is missing or out of date.
Site load offset is not a reliable project value.
Export margin is negative.
Three-phase current is calculated with a single-phase voltage basis or vice versa.
The result is being used as network approval or inverter-setting approval.

Phase: Single phase
Inverter export: 8 kW
Site load offset: 2 kW
DNSP export limit: 5 kW

Net export6 kW
Export margin-1 kW
Export current26.09 A

Export margin-1 kW

Curtailment required from the entered values is 1 kW.

Net export exceeds the entered limit, so export-control and DNSP source records need review.

DNSP export limit is entered by the user.
Site load offset is a worksheet assumption.
The calculator does not approve network connection.

Phase: Three phase
Inverter export: 15 kW
Site load offset: 3 kW
DNSP export limit: 10 kW

Net export12 kW
Export margin-2 kW
Export current17.32 A

Export margin-2 kW

Curtailment required from the entered values is 2 kW.

The net export is above the entered limit and the current record should stay with phase basis attached.

Three-phase current uses the square root of 3 relationship.
Voltage is entered as line-to-line for this case.
Export approval remains external to the worksheet.

Phase: Single phase
Inverter export: 8 kW
Site load offset: 3.5 kW
DNSP export limit: 5 kW

Net export4.5 kW
Export margin0.5 kW
Export current19.57 A

Export margin0.5 kW

Curtailment required from the entered values is 0 kW.

The net export is within the entered limit, but source values and export controls still need project review.

Site load offset is not guaranteed in every operating condition.
The entered export limit is project-specific.
No inverter setting is selected.