Synthesis

One kilowatt. Five realities.

A solar kilowatt is not one number. It begins as resource, passes through hardware and grid constraints, acquires a market price, then meets the uncertainty attached to every decision.

Reading order: Physical to accountable
Evidence domains: Five
Working example: One Perth kWp
Edition: 28 Jul 2026

Read in sequence

Keep the path visible.

These colours identify the kind of evidence in view. They do not imply performance, confidence or status. Signal Blue remains the cue for interaction and the focal datum.

Read from left to right. Each layer changes the meaning of the kilowatt and hands a smaller, more decision-ready quantity to the next. Never collapse unlike evidence into one unexplained score.

01 / ResourceWhat energy is physically available?
02 / TechnologyWhat converts and stores it?
03 / GridWhat can reach the point of use?
04 / MarketsWhat is the delivered energy worth?
05 / RiskHow much confidence should the decision carry?

01 / Resource and climate

1,793

kWh/kWp

The sky sets the opening quantity.

For Perth, the maintained TOPCon year-one P50 is the physical starting point: expected annual production from one installed kilowatt-peak.

It already carries the modeled production stack, but it is not revenue, delivered energy or a promise. Heat, cloud, wind, smoke, soiling and year-to-year irradiance variation determine how much energy is physically available before the network or tariff enters the decision.

Passes forward

Pass forward an explicit yield basis, location and weather window.

Open the climate passport Read the climate state

Source basis: Production Climate Passport snapshot, Perth TOPCon P50, verified 28 July 2026.

02 / Technology and assets

architectures

Hardware decides how much resource becomes output.

The maintained cross-market yield basis distinguishes PERC, TOPCon and HJT rather than treating every nameplate kilowatt as interchangeable.

Module efficiency, temperature response, degradation and storage conversion change the path from sunlight to usable electricity. The differences can be smaller than market pricing, but they are real, and they belong in the technology layer rather than being hidden inside a blended score.

Passes forward

Pass forward a named architecture, loss basis and asset boundary.

Inspect the yield method Read the technology scenarios

Source basis: Solar Analytica methodology and the maintained PERC, TOPCon and HJT yield baseline.

03 / Grid and delivery

8,760

intervals

The grid decides where each hour can go.

The WA Value Under Constraint ledger retains one row for every hour of a representative year.

Generation can serve on-site load, export under a network envelope or be curtailed. An annual total cannot reveal that allocation. Delivery evidence keeps time, connection limits and operating conditions visible so physical production is not mistaken for energy that reaches a paying use.

Passes forward

Pass forward delivered, self-consumed, exported and curtailed energy separately.

Open the interval model See the operating record

Source basis: Value Under Constraint method edition, with an open 8,760-row default ledger.

04 / Markets and value

cities

Price decides what delivered energy is worth.

The residential electricity panel covers 92 cities, exposing a spread in tariffs far wider than the spread in modeled solar yield.

One kilowatt-hour can offset a retail tariff, earn an export rate, settle at a wholesale price or have no value when curtailed. Market structure supplies the multiplier, which is why the sunniest location is not automatically the highest-value location.

Passes forward

Pass forward the price basis, customer position, tariff period and currency.

Compare market value Read the price evidence

Source basis: Global Residential Electricity Prices, 92-city panel with a 2025 price-to-yield join.

05 / Risk and accountability

1,756

kWh/kWp

Confidence decides how firmly the number can be used.

Perth's P90 planning floor is lower than its P50 opening case because a one-in-ten resource year must remain visible.

This P90 covers measured 2001 to 2023 irradiance variability only. Availability, curtailment, soiling and degradation uncertainty remain outside it. The disciplined result is not one universal risk score, but a stated boundary and a traceable record of what the number does and does not protect.

Passes forward

Pass forward the confidence level, excluded risks, source vintage and revision path.

Understand P50 and P90 Inspect the trust register

Source basis: Production Climate Passport, Perth P90 from measured resource variability only.

The synthesis rule

The number is useful when its path stays visible.

Start with the decision, follow only the evidence it needs, and preserve the handoff between physical resource, asset, delivery, value and confidence.

Open the Decision Atlas Explore the reports