Global calculator · Solar, battery & backup

Solar Self-Consumption Value Calculator

One solar kWh used in the home may offset a retail import, while an exported kWh may receive a different credit. Enter daily generation, same-time household use, import rate and export rate. The result caps self-consumption at the smaller of generation and daytime demand, preventing exported energy from being valued twice in one household planning scenario.

No account Formula visible Your rate and units

Use your evidence

What to have beside you

Use the current bill or tariff sheet, exact product label, location-specific solar estimate, or measured project dimensions. Example physical values teach the tool; zero money rates prevent an unsourced price from becoming a default claim.

USUSA GBUK AUAustralia AEUAE CACanada EUEU NZNew Zealand SGSingapore

Enter your details

Your values

Every input includes a simple explanation.

Simple wordsFormula shownPrivate inputs

Simple viewUsing editable example assumptions for technical settings.

Average solar generationUser-entered value — example shownThe electricity the solar array is expected to produce on an average day at your location.

kWh/day

Use during solar hoursUser-entered value — example shownThe electricity your home uses while the solar array is generating.

kWh/day

Days in periodUser-entered value — example shownHow many days are covered by the bill or comparison period.

days

Import rate avoidedUser-entered value — example shownThe price you pay for one kilowatt-hour of electricity. Copy it from your own bill or tariff sheet.

USD/kWh

Export creditUser-entered value — example shownThe amount credited for one kilowatt-hour exported to the grid.

USD/kWh

CurrencyUser-entered value — example shownThe currency used on your bill or quote. It changes the symbol, not the formula.

Helpful tip: Choose the currency printed on your bill or quote. No exchange-rate conversion is performed.

Private: calculations run in your browser; a saved scenario stays on this device.

Your result

Estimated solar energy value

$0.00

Self-consumed energy offsets the entered import rate; exported energy receives only the entered export rate.

Solar used at home300 kWh

Solar exported150 kWh

Avoided import value$0.00

Export value$0.00

How this was calculated

Formula used

Self-consumed solar = min(generation, daytime use); exported solar = max(generation − daytime use, 0); value = self-use × import rate + export × export rate

Your values in the formula

self-use = min(450, 300) = 300 kWh; export = 150 kWh; total value = $0.00 + $0.00 = $0.00

Assumptions and rounding

Generation and same-time demand are period averages.
No installation cost, degradation, tax or incentive is included.

This is an energy-value scenario. Shading, system losses, tariff rules, taxes, curtailment, financing and degradation can change real outcomes.

Was this calculation useful?

Report a formula, source or accessibility issue

What the result means

Use it as a scenario

This is an energy-value scenario. Shading, system losses, tariff rules, taxes, curtailment, financing and degradation can change real outcomes.

If 15 kWh is generated and 10 kWh is used at the same time, 10 kWh is self-consumed and 5 kWh is available for export.

What can change

Check before deciding

01PV production must come from a location-specific estimate or monitoring data.
02Export credit rules and settlement periods vary.

Formula and context sources

Verify this calculation

Source links establish context or measurement relationships. Your personal rate and project values remain your inputs.

USAsolar storage

PVWatts Calculator

National Renewable Energy Laboratory

Estimate location-specific PV production before entering a solar-generation scenario.

Open official resource

EUsolar storage

Photovoltaic Geographical Information System

European Commission Joint Research Centre

Location-specific PV production estimates for user-entered solar scenarios.

Open official resource

Australiasolar storage

Size your solar system

Australian Government

Official planning guidance for matching solar size to household use.

Open official resource

UAEsolar storage

Shams Dubai

Dubai Electricity and Water Authority

Official distributed-solar programme context.

Open official resource

New Zealandsolar storage

Plan your home solar system

Energy Efficiency and Conservation Authority

Independent solar planning guidance.

Open official resource

Plain-language guide

Why solar self-consumption matters more than total generation

Value solar electricity used at home separately from exported electricity with transparent rates.

Read the guide

Continue the decision

Related calculators

Working shownSolar, battery & backupHome Battery Energy-Shift Calculator

Estimate deliverable shifted energy and gross rate-spread value after round-trip losses

Open calculator Working shownEnergy bills & appliancesTime-of-Use Electricity Plan Comparison

Compare peak and off-peak energy charges with a flat-rate plan using the same electricity use

Open calculator

Written and maintained by Tilock SadhukhanReviewed 21 July 2026Version 1.0