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Battery Analysis

Will the lights stay on? Prove it.

Powerlily simulates the selected battery bank against 8,760 hours of project production and customer usage, then explains backup duration, seasonal range and economic value in the same proposal workflow.

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Powerlily battery analysis with backup duration and storage value
Storage with evidence

Size the battery against the home and solar system.

A capacity label cannot answer when the battery will charge, how long it will support the house or what it may save. Powerlily resolves those questions hour by hour and carries the result into design, engineering and sale.

01

Model

Simulate a year of real operating conditions.

The battery is tested against the changing relationship between generation, consumption and equipment limits rather than a single daily average.

Production from the design The array and storage model share the same hourly foundation.
Load from the customer Consumption data grounds the other side of the analysis.
  1. 01.01

    8,760 hourly state-of-charge steps

    Charge from the solar design, serve the modeled load and carry the battery state through every hour of the year.

  2. 01.02

    Use the best customer data available

    Work from hourly consumption when available, with supported fallbacks to monthly usage or load-only analysis when the project has less detail.

  3. 01.03

    Production comes from the selected array

    Use the hourly solar result of the actual panel layout instead of a generic system-yield assumption.

  4. 01.04

    Respect power and efficiency constraints

    Apply charge limits, discharge limits and round-trip efficiency across the selected battery bank.

  5. 01.05

    Explain the result plainly

    Translate the simulation into customer-ready conclusions without hiding the inputs that produced them.

02

Prove backup

Test the outage, not the slogan.

Backup duration changes with the hour, season, solar availability and system architecture. Powerlily shows the range instead of promising one flattering number.

A year of changing conditions Backup expectations account for when an outage begins.
Equipment-specific sizing Selected storage limits remain part of the result.
  1. 02.01

    Worst-case outage sweep

    Start an outage at different hours across the modeled year to find the conditions that produce the shortest support duration.

  2. 02.02

    Seasonal min, average and max

    Summarize rolling 90-day windows so the customer can see how backup changes through winter, shoulder seasons and summer.

  3. 02.03

    Backup with and without solar

    Separate stored-energy duration from solar-assisted operation so daylight charging does not silently inflate the claim.

  4. 02.04

    Model coupling and readiness

    Represent the relevant AC- or DC-coupled behavior and call out the equipment assumptions needed for backup operation.

  5. 02.05

    Compare battery configurations

    Change the selected units and quantities, then rerun the same home and solar conditions before recommending a system.

03

Value and deliver

Connect resilience, economics and engineering.

The analysis supports both the customer's buying decision and the team's downstream documentation, using the same battery configuration throughout.

Rate-aware value Storage can be evaluated against when energy costs money.
Peak-demand analysis Commercial value gets its own operating logic.
  1. 03.01

    Time-of-use arbitrage

    Model charging and discharge against utility periods to estimate how storage can shift energy away from expensive hours.

  2. 03.02

    Demand-charge savings

    For applicable tariffs, test how battery dispatch may reduce peaks instead of treating every commercial load like a residential bill.

  3. 03.03

    A 30-year value view

    Carry modeled annual value into a longer-term storage story while keeping it distinct from backup performance.

  4. 03.04

    The same battery in the proposal

    Present the selected equipment, backup range and economics alongside the solar design instead of sending a separate calculator output.

  5. 03.05

    The same battery in engineering

    Carry the storage configuration into the SLD and permit plan set, including equipment documents tied to the catalog.

    Single-line diagrams

Sell the battery with a defensible answer.

Model backup and value against the actual home, solar design and equipment.

Get Started See the SLD editor
Pericles
Pericles
Powerlily assistant
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