Input panel

Spot vs Fixed · your real year

Feed it your year.
It reads the verdict.

Two files in, one verdict out — what a full year of your real usage would have cost on wholesale spot versus your fixed retail plan.

The two readings

Two readings in.

Enter your plan's rates (or upload your bill), and add your meter data. The panel models both plans on the very same 5-minute intervals.

Your plan rates

Manual Copy these numbers straight off your latest electricity bill. Works for any retailer and any plan.

Find your current plan or type your rates directly below Your postcode (SA)

Home Small business

Retailer Plan

Usage rate c/kWh Daily supply charge c/day Solar feed-in tariff (0 if no solar) c/kWh

My bill shows these rates excluding GST (add 10%) Plan name (optional)

NEM12 meter data

CSV Your interval (5-minute) usage export — import and export channels. Request it from your distributor's portal (e.g. SA Power Networks). Drop a CSV or click to browse · required Drop a CSV file nem12.csv

Network tariff

Time of use (RTOU) Single rate (RSR) Small business single rate (BSR)

Your SAPN network tariff. It’s shown on your bill or SAPN portal. Most homes are on time of use; small businesses are usually on the single rate (BSR).

My meter has a controlled load (E2) channel

Controlled load rate on your current plan c/kWh inc GST Controlled load daily charge, if billed c/day inc GST

Only needed if your NEM12 file has an E2 channel — the run will ask if so. On the spot side, controlled load is priced at wholesale automatically.

Before you run it, tell us who you are.

Free tool from Blue Gold Energy. We store your name, email and company with the run time so we know who is finding it useful. No spam, no account.

Name

Work email

Company (optional)

Have an access code?

Access code

Modelled on real AEMO wholesale + SA Power Networks network rates. Nothing to configure.

Processing

Reading…

Reading your meter data…Step 1 of 3

Energy readout

Spot vs Fixed · your meter data

On a full year of real meter data, this household would have paid less on spot.

saved in a year on spot vs fixed 0% lower

Imported—

Solar export—

Period—

Interval coverage—

The comparison

Two plans, one year of usage.

Every five-minute interval priced twice — against AEMO wholesale plus the SAPN network, and against your fixed retail contract.

Fixed — your retail plan

Annual total, inc GST

↓ cheaper

Spot — wholesale + network

Annual total, inc GST

Cumulative cost across the year

What the bill totalled, month by month, on each plan.

Spot Fixed

The gap between the lines is the difference between the plans.

Show the working

Where the difference comes from.

The full cost stack, both plans, inc GST. No rounding on this layer — these are the figures the model produced.

Component	Fixed (retail)	Spot (wholesale)	Difference

Reading the split: a fixed retail plan bundles energy, network, metering and pass-through costs into a single rate; spot itemises them. Spot pass-through rates are the ones itemised on real Amber SA bills; the loss-factor MLF (~1.0) and the negative-price export-curtailment assumption are the only estimates. A positive difference means spot was cheaper on that component.

View the full report Download report pack (ZIP)