Global decision workspace

Solar, battery & backup

Value self-consumed solar, exported energy, battery losses and backup runtime as separate decisions.

Answer first

Separate generation, timing, storage and backup

A solar or battery decision contains several different energy paths. Solar used immediately can avoid imported energy; solar exported may receive another credit; battery charging and discharging lose energy; backup reserve may not be available for daily rate shifting. Model each path once so the same kWh is never counted twice.

Decision boundary: Energy value is not project payback. Equipment price, finance, degradation, installation, incentives, power limits and safety design need current local evidence and professional checks.

Choose by outcome

Three useful starting paths

Open the path that matches the evidence you have and the decision you need to make.

01

Value solar self-use

Split household use, export and generation before assigning rates.

Open this path 02

Test battery rate shifting

Include charging input, delivered energy and round-trip loss.

Open this path 03

Estimate backup runtime

Reduce nominal storage by usable share and conversion efficiency.

Open this path
Check before using the answer

Common mistakes this workspace prevents

  1. 01

    Valuing one solar kWh as both avoided import and paid export.

  2. 02

    Multiplying battery nameplate capacity by cycles while ignoring losses and reserve.

  3. 03

    Using daylight hours as a location-specific solar yield estimate.

Local context

Continue with a country pack

Country pages connect the same formulas to local bill vocabulary, official sources and measurement conventions without selecting a tariff for you.

AUAustraliaUSUnited StatesAEUnited Arab EmiratesNZNew Zealand
Choose the closest question

3 transparent calculators

Working shownSolar, battery & backupSolar Self-Consumption Value Calculator

Separate solar electricity used at home from exports and value each with its own rate

Open calculator Working shownSolar, battery & backupHome Battery Energy-Shift Calculator

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

Open calculator Working shownSolar, battery & backupGlobal Battery Backup Runtime Calculator

Estimate backup runtime from voltage, amp-hours, usable discharge, conversion efficiency and load

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Learn the decision

Related global guides

Why solar self-consumption matters more than total generationValue solar electricity used at home separately from exported electricity with transparent rates.Home battery rate shifting after round-trip lossesEstimate delivered battery energy, charging input and gross tariff-spread value before payback claims.Australia solar export limits and curtailmentEstimate how an Australian solar export limit changes self-consumption, exported energy and curtailed generation using your monitoring data and rates.