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BESS

Size, simulate and finance battery storage — with confidence.

Model solar-hybrid, wind-hybrid or standalone battery projects: 15-minute dispatch simulation, DFR compliance, a 25-year financial model with IRR, NPV and payback, plus degradation and sensitivity analysis — right through to lender-grade metrics.

Get it free on the Microsoft StoreDownload installer (.exe)

Windows 10 / 11 · 64-bit · free to download and try

Built forStorage developersHybrid RE / FDRE bidsTender / DFR analysisInvestment committees
BESS decision-grade metrics — equity IRR, min DSCR, NPV, payback, MoIC and the path-to-payback cumulative cashflow curve
How it works

From download to deliverable.

01

Load generation

Feed a 15-minute solar / wind CSV for your site and period.

02

Configure system

Set contracted capacity, BESS energy & power, DFR targets and peak hours.

03

Simulate or optimise

Run the dispatch, or let it size solar / wind / BESS for best IRR.

04

Review & export

Read the dashboard, then export a PDF report, plots and DFR CSV.

See it work

Real output, straight from the app.

Not mockups — these are actual results the app generates, ready to export.

Analysis dashboard
BESS analysis dashboard — dispatch, DFR compliance and cashflow charts
Generation vs contracted capacity, state-of-charge, monthly DFR, revenue vs OPEX and cumulative cashflow — one view.
Single-variable sweep
Single-variable sensitivity sweep — IRR and NPV against solar capacity
Sweep any driver — here solar capacity — and watch IRR and NPV respond, with the full data table beside the curves.
2-variable IRR heatmap
Two-variable IRR heatmap across solar and wind capacity
Map IRR across two drivers at once — solar versus wind capacity — to find the bankable sweet spot at a glance.
Lender-grade report
BESS project analysis report — financial metrics and monthly DFR compliance
The numbers a lender checks — IRR, NPV, LCOE / LCOS, payback and MoIC — plus month-by-month DFR compliance.
Capabilities

From dispatch to bankability.

15-min dispatch simulation

Charge / discharge and state-of-charge across the whole year — 35,040 intervals.

DFR compliance

Monthly peak / off-peak targets, penalties and shortfalls, at the binding regime.

25-year financial model

Project / equity / post-tax IRR, NPV, payback, min & avg DSCR, LCOE / LCOS, MoIC.

Battery degradation

Linear or custom SoH curve with EOL replacement or augmentation.

Sensitivity & Monte Carlo

Single-variable sweep, tornado, 2-variable heatmap and breakeven solver.

Optimise sizing

Differential-evolution search to size solar / wind / BESS for a target IRR.

Bankable, not just MWh

Goes all the way to lender-grade metrics an IC and a lender can defend.

Single-line diagram

Auto-generated SLD with IEC symbols for the plant, exportable to DXF and KMZ.

Export PDF · CSV

Analysis report, plots and a DFR CSV for the record.

Model your storage project — free to try.

Download it and run your first simulation today.

Get it free on the Microsoft StoreDownload installer (.exe)

Windows 10 / 11 · 64-bit · free to download and try

Need the other app? Explore SolarLayout